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Science MCQs for TET

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1, An ordinary tube light used for lighting purposes contains

(a) fluorescent material and an inert gas

(b) one filament, reflective material and mercury vapour

(c) fluorescent material and mercury vapour

(d) two filaments, fluorescent material and mercury vapour

2. The term ‘Black Box’ is more commonly used in relation to which of the following?

(a) It is a box in which high grade uranium is kept to prevent radiation.

(b) It is a time capsule in which records of important events are kept to be opened at a

later date,

(c) It is a flight recorder in an aero plane.

(d)None of these

3. The lightning conductor used in building, protects the building by

(a) dissipating the electric charge away from the building

(b) conducting the lightning safely to the ground

(c) absorbing the electric charge

(d) None of these

4. Sodium vapour lamps are preferred over incandescent lamp because of

(a) higher tolerance to voltage fluctuation (b) higher intensity of illumination

(c) easy installation (d) None of these

5. The principle of working of periscope is based on

(a) reflection only (b) refraction only

(c) reflection and refraction (d) reflection and interference

6. The working of the quartz crystal in the watch is based on

(a) Johnson effect (b) Photoelectric effect

(c)Edison effect (d) Piezo electric effect

7. A handwritten message can be instantly transmitted as such to any part of the

world through

(a) Speed post (b) Telex (c)Electronic mail d) FAX


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8. Which of the following combinations of aperture and shutter speed of a camera will

allow the maximum exposure?

(a) F-5.6,1/l000

(b) F-8,l/250

(c) F-16,l/l25

(d) F-22,1/60

9. Hardware is related to?

(a) calculator

(b) computers

(c) acids

(d) heavy metals

10. Which of the following best explains the phenomenon ‘Simple Harmonic Motion’?

(a) Cylinder

(b) Disc

(c) Pendulum

(d) None of these

11. Jet engines are

(a) rotary engines

(b) turbine engines

(c) external combustion engines

(d) reaction engines

12. In an engine run on diesel, ignition is caused through

(a)friction

(b) automatic starter

(c)spark plug

(d) compression

13. In an electronic watch, the component corresponding to the pendulum of a

pendulum clock is

(a)Transistor

(b) Balance Wheel


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(c) Crystal Oscillator

(d) Diode

14. The hydraulic brakes used in automobiles is a direct application of ?

(a) Archimedes’ Principle

(b) Toricellian law

(c) Bernoulli’s theorem

(d) Pascal’s law

15. Which of the following statements is correct?

(a) Dynamo converts electrical energy into heat energy and electric motor converts

mechanical energy into electrical energy.

(b) Dynamo converts mechanical energy into electrical energy and electric motor

converts electrical energy into mechanical energy.

(c) Both dynamo and electric motor convert electrical energy into mechanical energy.

(d) Both dynamo and electric motor convert mechanical energy into electrical energy.

16. An electron microscope gives higher magnification than an optical microscope

because

(a) it uses more powerful lenses.

(b) the velocity of electrons is smaller than that of visible light.

(c) the electrons have more energy than the light particles.

(d) the wavelength of electrons is smaller as compared to the wavelength of visible

light.

17. The conversion of electrical energy into chemical energy is observed in ?

(a) fan

(b) storage battery

(c) heater

(d) incandescent bulb

18. The most efficient engine is ?

(a) Petrol

(b) Diesel

(c) Electric


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(d) Steam

19. The tape of a tape recorder is coated with

(a) Zinc oxide

(b) Copper sulphate

(c) Mica

(d) Ferromagnetic powder

20. When a coil is rotated in magnetic field, induced current is generated in the coil.

This principle is used in making ?

(a) electromagnet

(b) electric motor

(c) electric generator

(d) electric watt meter

21. Distant objects can be seen with the help of

(a) chronometer

(b) microscope

(c)telescope

(d) spectroscope

22. The safety fuse should have

(a) high resistance and high melting point

(b) high resistance and low melting point

(c) low resistance and high melting point

(d) low resistance and low melting point

23. Greenhouse is?

(a) a building chiefly of glass in which the temperature is very low.

(b) a building in which green plants are cultivated.

(c) a building chiefly of glass in which the temperature is maintained within the

desired range.

(d) None of these

23. Given below are some of the home appliances:


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1. 1/8 H.P. Water pump, 2. Fluorescent tubelight 3. Room heater 4. Night lamp

Which of the following is the correct sequence in decreasing order of the wattage of the

above?

(a) 2,1,3,4 (b) 3,1,2,4 (c)3,2,1,4 (d) 4,2,1,3

25. Which of the following is/are true regarding the third (thicker) pin in a 3-pin plug?

1. It ensures better electrical contact.

2. It is connected to the body of the electrical device.

3. It is connected to the earth terminal.

4. It is connected to the neutral terminal.

(a) 1 and2 (b) 2 and 3 (c) 1 and3 (d) 4only

26. Consider the following statements about a thermos flask:

1. It is a practical device in which the beat flowing into or out of the system by

conduction, convection or radiation is reduced as much as possible.

2. It consists of a double – walled glass vessel.

3. The heat transfer by convection is minimized by silvering the surfaces and the

radiation is minimized by evacuating the space between the walls.

Of these, the correct ones are

(a) l and 2

(b) 2 and 3

(c) l and 3

(d) l,2 and 3

27. Which of the following are true regarding the compact fluorescent tubes now

available in market for home use?

1. They use less power (about 20%) compared to filament type bulbs for same amount

of light.

2. They operate at higher voltages.

3. They are narrower and shorter than common fluorescent tubes.

(a) l and 2

(b) 2 and 3

(c) 1 and 3

(d) 1,2 and 3


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28. In an ordinary dry cell, the electrolyte is

(a) sulphuric acid

(b) manganese dioxide

(c) ammonium chloride

(d) zinc

29. Which of the following pairs of materials serves as electrodes in chargeable

batteries commonly used in devices such as torch lights, electric shavers etc. ?

(a) Iron and cadmium

(b) Nickel and cadmium

(c) Lead peroxide and lead

(d) Zinc and carbon

30. The mixed oxide fuel is used for which of the following?

(a) Nuclear Reactors

(b) Aero planes

(c) Cryogenic Engines

(d) PSLV rockets

31. Conversion of chemical energy into electrical energy occurs in ?

(a)dynamos

(b) electric heaters

(c)battery

(d) atomic bombs

32. In the ordinary fire extinguisher, carbon dioxide is generated by the reaction of ?

(a) marble powder and dilute HCL

(b) magnesite and dilute HCL

(c) limestone and dilute Sulphuric Acid

(d) sodium bicarbonate and dilute Sulphuric Acid

33. Which of the following take place when the subject speaks untruth while being

tested by the polygraph instrument?

1.. His blood pressure goes up.


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2. His pulse quickens.

3. His skin darkens.

4. He sneezes.

(a) l and 2

(b) 3 and 4

(c) l,2 and 3

(4) 2,3 and 4

34. What is the function of a microprocessor in a computer?

(a) It allows the key board to write on the computer.

(b) It allows the outputs to be taken from a computer.

(c) It performs all the functions of a CPU (Central Processing Unit).

(d) None of these

35.Teletext means?

(a) the process of convening black & white TV sets into coloured ones.

(b) flashing of telephone conversation on TV screen.

(c) flashing the text of the message on the telex machine.

(d) flashing of the text of news and information on the TV screen.

36. Which of the following statements about a refrigerator is/are correct?

1. It converts electrical energy into heat energy.

2. It converts electrical energy into mechanical energy.

3. It transfers heat from a high temperature to a low temperature.

4. It transfers heat from a low temperature to a high temperature.

(a) 1 and3 (b)2 and 3 (c) 1 and 4 (d) 4 only

37. Which of the following statements are true regarding transmission of television

programmes?

1. Picture is transmitted with velocity of light.

2. Sound is transmitted with velocity of sound.

3. Sound is transmitted with velocity of light.

4. Different colours of the picture.are transmitted with different velocities.

(a) l and 3 (b) 1,2 and 3 (c) 2,3 and 4 (d) l,3 and 4


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38. The anode in a dry cell consists of

(a) graphite b) zinc (c) copper (d)cadmium

39. The technique used to transmit audio signals in television broadcasts is

(a) Amplitude Modulation (b) Frequency Modulation

(c) Pulse Code Modulation (d) Time Division Multiplexing

40 Floppy disc in a computer system is

(a) compiler (b) core memory (c) software (d) device for storing and retrieving data

41. The best colour (s) for a sun umbrella will be

(a)black

(b) black on top and white on the inside

(c)white on top and black on the inside

(d) printed with all the seven colours of rainbow

42. Which one of the following can be used to confirm whether drinking water contains

a gamma emitting isotope or not?

(a) Spectrophotometer (b) Microscope (c) Scintillation counter (d) Lead plate

43. The following processes take place during the launching of a rocket:

1. Rocket fuel is burnt.

2. Gases are produced.

3. Rocket moves in the forward direction.

4. Gases come out with momentum in back ward direction.

The correct sequential order in which the above processes occur, is

(a) 1,2,3,4

(b) 1,3,2,4

(c) 1,2,4,3

(d) 1,3,4,2

44. A computer can be freely programmable

(a) if it is of a digital type (b) if it is controlled synchronously

(c) if it contains a read only memory (ROM) (d) if it contains a random access

memory(RAM)


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45. Which of the following polymers is widely used for making bullet proof material?

(a) Polyethylene (b) Polyamides (c) Polyvinyl chloride (d) Polycarbonates

46. What is a flow chart in computer terminology?

(a) A graphical representation of a sequence of operations in a computer program

(b) A circular chart used for computer languages

(c) A debugging programme.

(d) None of these

47. A transistor is most likely to be found in a

(a)wrist watch (b) fuse c)hearing aid (d) fluorescent lamp

48. Ball bearings are used to reduce friction by

(a) applying lubricants to the balls used

(b) reducing the area of contact with the use of metallic balls

(c) increasing the area of contact with the use of metallic balls

(d)None of these

49. Aviation fuel for jet aeroplanes consists of purified

(a)petrol (b) kerosene (c)gasoline (d) diesel

50. Recoil of a gun is an example of

(a) conservation of mass (b) conservation of energy

(c) conversion of Potential Energy into Kinetic Energy

(d) conservation of linear momentum

SCIENTIFIC INSTRUMENTS

• Hydrometer measures humidity

• Barometer measures atmospheric pressure

• Purity of milk is measured by lactometer

• Fathometer measures the depth of oceans.

• Sextant is used for measuring altitude of Sun and other heavenly bodies

• Chronometer records accurate time on ships


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• Algesimeter indicates the degree of sensitiveness of skin

• Altimeter measures altitudes

• Ammeter measures current

• Anemometer records velocity of wind

• Cyamometer measures blueness of sky or ocean

• Dasymeter measures density of gas

• Galvanometer measures small electric current

• Hydrometer measures relative density of liquids

• Hygrometer measures humidity in atmosphere

• Hypsometer measures atmospheric pressure to ascertain elevations by determining

boiling point of liquid. Or Hypsometer is an instrument for measuring the height above

sea level.

• Manometer measures pressure of gases

• Micrometer measures minute distances

• Periscope is used for viewing objects above eye level

• Cyclotron is used for electromagnetic acceleration of charged atoms

• Geiger counter is used for detecting and recording radioactivity. It was invented by

Hans Geiger (1882-1945)

• Pyrometer measures high temperatures

• Refrectometer measures refractive index of a substance

• Seismograph measures intensity of earthquake

• Telstar transmits wireless or T.V broadcast

• Viscometer measures viscosity of liquids

• Spiro graph records the movement of lungs

• Photometer measures rate of transpiration

• Scotograph is used for enbling blind to write

• Eratosthenes measures distance round the earth

• Kaldio-scopes have proved helpful in finding the amount of dampness in soil

• Mohr’s scale measures degree of hardness of minerals

• RBC and WBC is bloods are counted by Hemocytometer.

• Manometer is the instrument of measuring gas pressure.

• Spectrometer instrument for measuring the spectrum of light.


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• The variation in the blood flow can be heard with an instrument called _

stethoscope_

• What is measured by an interferometer-Wavelength of light

• Hydrophone is used for measuring sound under water.

• Magnometer is an instrument designed to compare the magnetic movement and

field.

• Potometer is used to measure the rate of respiration in animal and plants.

• For measuring solar radiation we use pyrheliometer.

• Actimometer measures direct heating power of the Sun.

• Ammeter is use for measuring current strength.

• Manometer is the instrument of measuring gas pressure.

• Spectrometer instrument for measuring the spectrum of light.

• The measurement of rainfall is made by an instrument known as rain gauge

• What is measured with an ombrometer-Rainfall

• The instrument used to measure very high temperature: Infrared pyrometers

• Mechanical energy into electrical energy: Generator

• Heat energy into mechanical energy: Heat engine or steam engine.

• Electrical energy into mechanical energy: Electrical Motor

• Electrical energy into sound energy: Loudspeaker

• Sound energy into electrical energy: Microphone

• The device used to measure radioactivity: Geiger-Muller tube

• The device which converts the chemical energy into electrical energy: Battery

• The device used to measure radioactivity. Geiger counter

• Hygrometer is instrument used for measuring humidity of air.

• Heliscope is used for viewing the sun.

• What does a potometer measure- Water intake

• Clinical thermometer usually measures in Fahrenheit.

• Actimometer measures direct heating power of the Sun.

• Ammeter is use for measuring current strength

• Voltammeter is an electrolytic cell for conducting electrolytic dissociation of

electrolyte.

• What does a drosomoter measure: Dew

• Relative density of an atmosphere is measured by hygrometer.


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Spirograph is an apparatus used for recording the movement of the lungs.

The maximum limit of sound beyond which a person can become deaf is 129 lbs.

Charles K Rhodes developed an X-Ray emitting laser in 1990.

Sono meter is an instrument used to study the behavior of vibrating string.

The instrument used for measuring the velocity of wind is known as anemometer.

Altimeter: an apparatus used in aircraft for measuring altitudes.

Ammeter: is used for to measure intensity of sound.

Anemometer: is an instrument for measuring the force and velocity of wind.

Audiometer: an instrument to measure intensity of sound.

Audiophone: is an instrument required for improving imperfect sense of hearing.

Barograph: for continuous recording of atmospheric pressure.

Barometer: is an apparatus used for measuring the atmospheric pressure.

Binoculars: is an instrument used for seeing distant objects, the rays of light are twice

reflected by means of right-angled prisms.

Callipers: a compass with legs for measuring the inside or outside diameter of bodies.

Calorimeter: an instrument used for measuring quantities of heat.

Carburettor: is an apparatus for charging air with petrol vapours in an internal

combustion engine.

Cardiogram: a medical instrument used for tracing the movements of the heart.

Cardiograph: is a medical instrument for tracing heart movements.

Chronometer: is an instrument kept on board the ships for measuring accurate time.

Cinematograph: It consists of a series of lenses arranged to throw on a screen an

enlarged image of photographs. The lens system which forms the image on the screen

is termed the focusing lens.

Commutator: split ring which forms the main part of a D.C. Dynamo.


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Compass needle: for knowing approximately the North-South direction at a place.

Crescograph: is an instrument for use in recording growth of plants; invented by J.C.

Bose.

Dip Circle: It is an instrument used to determine the angle between the direction of

the resultant intensity of earth’s field and the horizontal component at a place. This

particular angle is know as the dip of that place.

Drinker’s apparatus: to help breathing in infantile paralysis.

Dynamo: The origin of electricity in a Dynamo is the transformation of mechanical

energy into electrical energy. It depends on the principle of electro-magnetic induction

whereby a current is produced on traversing a magnetic field.

Electroencephalograph (EEG): It is the technique of recording and interpreting the

electrical activity of the brain. Records of the electrical activity of the brain, commonly

known as “brain waves”, are called electroencephalograms or electroencephalographs.

EEG is the common abbreviation for both the technique and the records.

Epidiascope: for projecting films as well as images of opaque articles on a screen.

Eudiometer: It is a glass tube for measuring volume changes in chemical reactions

between gases.

Fathometer: is an instrument used for measuring depth of the ocean.

Galvanometer: an instrument for measuring currents of small magnitude.

G.M. Counter (Geiger Muller Counter): This special device is used for detecting the

presence of radiation and counting certain atomic particles.

Gramophone: an instrument with which we can reproduce the sound recorded by a

suitable recording apparatus. It is fitted with a special type of apparatus known as

sound box invented by Berliner.


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Gravimeter: is an instrument for recording measurement under water and to

determine the presence of oil deposits under water.

Gyroscope: is an instrument used to illustrate dynamics of rotating bodies. It is a type

of spinning wheel fixed to the axle.

Hydrometer: is an instrument used for measuring the specific gravity of liquids.

Hydrophone: is an instrument used for recording sound under water.

Hygrometer: is an instrument used for measuring humidity in air.

Kymograph: is an instrument used to record graphically various physiological

movements i.e., blood pressure, heart beating, study of lungs etc in living beings.

Lactometer: is an apparatus used for measuring the purity of milk.

Manometer: for determining the pressure of a gas.

Mariner’s Compass: is an apparatus which is used to guide the sailors. The needle

always points north-south.

Micrometer: is an instrument used for converting sound i.e., fraction of the lowest

division of a given scale.

Microphone: is an instrument used for converting sound waves into electrical

vibrations.

Microscope: is an instrument which is used for magnifying minute objects by a lens

system.

Microtome: is used for cutting an object into thin parts for microscopic inspection.

Odometer: is an instrument by virtue of which the distance covered by wheeled

vehicles is recorded.

Periscope: It is usually used by the crew of a submarine to survey the ships etc, on the

surface of the sea while the submarine is under water. It also enables the sailors to

observe objects on the other side of an obstacle without exposing themselves.


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Phonograph: is an instrument used for reproducing sound.

Photometer: is an apparatus used to compare the illuminating power of two sources of

light.

Pipette: It is a glass tube with the aid of which a definite volume of liquid may be

transferred.

Potentiometer: is used for comparing the e.m.f.s, of cells, measurements of the

thermal e.m.f.s, large potential differences and currents. It is also used for measuring

low resistances.

Psychrometer: is an instrument for measurement of the humidity of the atmosphere.

Pyrometer: is an instrument for recording high temperatures from a great distance

(i.e., for recording temperature of the sun etc.) by making use of the laws of radiation.

Radar: Radio, Angle, Detection And Range is used to detect the direction and range of

an approaching aeroplane by means of radio microwaves.

Rain Gauge: is an apparatus for recording of rainfall at a particular place.

Radiometer: is an instrument for measuring the emission of radiant energy.

Refractometer: is an instrument to measure refractive indices.

Saccharimeter: is an instrument for determining the amount of sugar in a solution. It

is used in breweries.

Seismometer or Seismograph: is an instrument used for recording earthquake shocks.

Sextant: is an instrument invented by John Hadley used for measuring the altitude of

the sun and of other inaccessible heavenly bodies.

Spectrometer: (1) It is a type of spectroscope suitable for the precise measurements of

refractive indices. (2) An instrument for measuring the energy distribution of a

particular type of radiation.

Speedometer: is an instrument which indicates speed at which a vehicle is moving.


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Spherometer: is an instrument for measuring curvature of surfaces.

Sphygmomanometer: an instrument used for measuring arterial blood-pressure.

Sphygmophone: an instrument, with the help of which a pulse beat makes a sound.

Sphygmoscope: an instrument, by virtue of which, arterial pulsations become visible.

Stereoscope: It is a special type of binocular, through which a double photograph

snapped from two different angles by a two-lensed camera is viewed in solid relief.

Stethoscope: is an instrument to hear and analyse movements of heart and lungs.

Stop watch: for recording small intervals of time in the laboratory, in races and other

events.

Stroboscope: is an instrument for viewing objects moving rapidly with a periodic

motion and to see them as if they were at rest.

Tachometer: is an instrument for determining speeds of aeroplanes and motor boats.

Telephone: a device by virtue of which two persons at two different places can

communicate. It consists of two main parts (i) a microphone and (ii) a receiver.

Teleprinter: an instrument which prints automatically messages sent from one place

to another, on telegraph lines.

Telescope: is an apparatus used for observing distant objects.

Theodolite: is an instrument for measuring horizontal and vertical angles.

Thermocouple: an instrument based on thermo-electricity used for measuring

temperatures.

Thermometer: is an apparatus used for measuring temperature.

Thermostat: It is an instrument used to regulate the temperature to a particular

degree.

Viscometer: is an instrument to measure viscosity.


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SCIENCE MCQS: NEXT LEVEL

1. The energy released on account of the motion of a body is termed as the:

A. potential energy B. kinetic energy C. relative velocity D. None of these

Answer: (B)

2. Kilowatt is the measuring unit of:

A. power B. current C. work D. energy

Answer: (A)

3. In which unit can we measure food energy?

A. Calorie B. Kelvin C. Joule D. Erg

Answer: (A) 4. The conservation of energy principle refers to the fact that:

A. it is essential not to waste natural gas and oil, for these are limited in supply

B. solar heating makes use of the sun’s energy, which would otherwise be wasted

C. energy can neither be created nor destroyed

D. nuclear-power plants recycle spent fuel

Answer: (C)

5. One HP is equal to ___ kg per meter per second.

A. 25 B. 50 C. 75 D. 10

Answer: (C)

6. When a constant force is applied to a body, it moves with uniform:

A. Speed B. Velocity C. Acceleration D. Momentum

Answer: (B)

7. ‘Parsec’ is a unit of:

A. weight B. time C. speed D. distance

Answer: (D)

8. Knot is unit of speed of which of the following?

A. Ship B. Aeroplane C. Light rays D. Sound waves

Answer: (A)


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9. Assume that - A denotes narrow wheel, A wider wheel, B denotes small free wheel,

B larger free wheel, C denotes small gear wheel, C larger gear wheel, - in a rural area

where there are sandy tracts, it will be advisable to use a bicycle with :

A. A, B, C B. A, B, C C. A, B, C D. A, B, C

Answer: (B)

10. A wheel that has 6 cogs is meshed with a larger wheel of 14 cogs. When the

smaller wheel has made 21 revolutions, the number of revolutions made by the larger

wheel is:

A. 12 B. 49 C. 9 D. 4

Answer: (C)

11. If rubber tyres replace wheels in bullock carts then:

1. speed of bullock cart increases 2. load carrying capacity increases 3. the

capacity of bullock to pull the cart at a stretch increases 4. None of the above

A. 1 & 3correct B. 2 & 3correct C. 1 & 2correct D. 1, 2 & 3correct

Answer: (D)

12. Rolling a drum is easier than pulling it along a road because:

A. rolling causes less friction B. friction is more when the object is rolled

C. pulling willl damage the drum D. None of the above

Answer: (A)

13. Walking on ice is more difficult than walking on concrete because ice:

A. gives less friction B. gives more friction C. is very cold and as such

blood gets frozen up D. being soft, one can get bogged down into it while walking

Answer: (A)

14. What should be done by a car driver if he is caught on the way by a severe

thunder storm and lightening?

A. He should leave the wheel and lie down on the ground B. He should remain

inside the car with its window glasses all pulled up C. Park the car

beneath a tall tree D. Just bite a piece of cotton firmly in between the two

rows of teeth

Answer: (A)


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15. Ball bearings are used in cycles and scooters to:

A. reduce the area of contact between the two surfaces in contact

B. reduce friction between wheel and axle

C. increase friction between wheel and axle

D. reduce friction between ground and vehicle

Answer: (B)

16. How do the centripetal forces pull a body?

A. Upward B. Downward C. Inwards D. Outwards

Answer: (C)

17. When milk is churned, the cream separates from it due to the:

A. cohesive force B. frictional force C. centrifugal force D. gravitational force

Answer: (C)

18. A body in circular motion requires:

A. centrifugal force B. centripetal force C. inertial force D. gravitational

force

Answer: (B)

19. The rising of ink to the point of nib in a fountain pen is due to:

A. surface tension B. capillary action C. gravitational attraction D. None of the

above

Answer: (B)

20. As one goes up the mountain one suffers from nose bleeding sometimes. The

reason is thatA. blood pressure decreases at high altitudes

B. blood pressure increases at high altitudes

C. as one starts going up, the pressure of the blood capillaries becomes higher than

the outside pressure D. None of the above

Answer: (C)

21. Birds get thrust (forward motion) and lift (upward motion) from:

A. flapping of wings B. twisting of feathers C. shape of wings which is similar to

aeroplane blades D. air sacs


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Answer: (A)

22. Small rain-drops are spherical in shape because of:

A. surface-tension B. gravity C. atmospheric pressure D. evaporation

Answer: (A)

23. The cross-section of the water column in the given figure is circular. The diameter

of the bigger limb is 4 cm and that of the smaller limb 2 cm. A force of 40kg is placed

at the bigger end. What force will be required at the smaller end to keep the level of

water balanced?

A. 20 kg B. 80 kg C. 160 kg D. 10 kg

Answer: (D)

24. A body partially floats in water when:

A. the volume of the displaced water is greater than the volume of the body

B. a body immersed in fluid loses as much in weight as the weight of the displaced

volume of the fluid

C. the mass of the displaced water is greater than the mass of the body

D. None of the above

Answer: (B)

25. Which of the following is used in diesel engine? 1. Cylinder, 2. Spark plug 3.

Piston: Choose your answer from the codes given below :

A. 1, 2 and 3 B. 1 and 2 C. 2 and 3 D. 1 and 3

Answer: (D)

26. Iron is heavier than water, still the ship floats on the sea because__

A. weight of the ship is less than the weight of water in the sea

B. weight of the ship is more than sea water

C. weight of the ship is less than the weight of water that the ship displaces

D. weight of ship is equal to the weight of water that ship displaces

Answer: (C)

27. The volume of an object will be maximum when it is:

A. spherical B. rectangular C. cone shaped D. triangular

Answer: (A)


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28. The mass of the body is different from its weight because:

A. mass is variable quantity whereas weight is constant

B. mass is constant but weight increases as the body moves from the poles to the

Equator

C. mass varies very little at different places where as weight varies a lot

D. mass is a measure of the quantity of matter where as weight is a force

Answer: (D)

29. Which one of the following is a vector quantity?

A. volume B. mass C. weight D. density

Answer: (C)

30. The weight of a body at the centre of the earth is:

A. increased B. neutralized C. decreased D. the same

Answer: (B)

31. A certain amount of cold air will weigh heavier than the same amount of dry air

because of the:

A. greater number of molecules at low temperature

B. lesser number of molecules at high temperature

C. greater energy of molecules at high temperature

D. lesser energy of molecules at high temperature

Answer: (A)

32. A free-floating astronaut ‘A’ pushes another free-floating astronaut ‘B’ in space.

The mass of ‘A’ is greater than that of ‘B’. The force exerted by astronaut ‘A’ on

astronaut ‘B’ will be:

A. equal to zero

B. equal to the force exerted by ‘B’ on ‘A’

C. greater than the force exerted by ‘B’on ‘A’

D. less than the force exerted by ‘B’ on ‘A’

Answer: (A)

33. On the lunar surface:

A. weight remains same but mass varies B. mass remains same but weight varies


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C. both of them vary D. None of the above is true

Answer: (B)

34. The effect of circular movements on a person in a satellite around the earth is

that:

A. his mass becomes nil while the weight remains the same

B. his mass remains constant while weight becomes zero

C. his mass goes up while the weight remains unchanged

D. None of the above

Answer: (B)

35. A wooden block is floating in water. If 4/5 of its volume is immersed in water and

volume of the water displaced is 800ml, the volume of the block is:

A. 1140 ml B. 200 ml C. 800 ml D. 100 ml

Answer: (D)

36. A balloon filled with air is weighted (W) so that it just floats in water. When it is

further pushed a short distance in water it will:

A. sink to the bottom

B. stay at the depth where it stands submerged

C. not come back to its original position

D. sink down a little further but will not reach the bottom

Answer: (D)

37. Oil, water and gas can be present in a well in the ascending order of:

A. water, oil, gas B. gas, water, oil C. water, gas, oil D. oil, water,

gas

Answer: (A)

38. Mercury is preferred to water in barometer because:

A. mercury is good conductor of heat

B. It is bright and hence its level can be easily read

C. mercury is available in pure form

D. It has high density and low surface tension

Answer: (D)


23

39. An aeroplane rises up:

A. on account of upward thrust of air

B. as the air over the aeroplane is denser than that under the plane

C. as the pressure over its wings is more than the pressure under them

D. as its nose is pointed upwards

Answer: (A)

40. A boat filed with some stones is floating in water. If the stones are dropped into the

water, the level of the water will:

A. rise B. decrease C. remain the same D. insufficient data to

predict

Answer: (B)

41. When a ship enters sea from a river, its level:

A. remains same B. rises C. may or may not change D. decreases

Answer: (C)

42. There is a hole in the boat through which water is seeping into the boat. Just

before the boat capsizes :

A. water level in the boat will increase B. water level will decrease

C. water level will remain constant D. None of these

Answer: (A)

43. An ice cube is floating in a glass of water. How will the water level be affected

when the ice cube melts?

A. The level of water will go up B. The level of water will go down

C. The level of water will remain unchanged

D. In the beginning the level will go up but later on the level will go down

Answer: (C)

44. Fathom is the unit of:

A. sound B. depth C. distance D. frequency

Answer: (B)

45. Ordinary clocks lose time during summer. It is so because the length of their

pendulum:


24

A. increases and so does the length of time

B. increases and therefore its duration of time decreases

C. decreases and therefore the length of time increases

D. decreases and therefore the length of time decreases

Answer: (A)

46. A body is attached to a spring balance suspended from a stand. The reading on

the balance is 0.5 kg. The two together are detached from the stand and allowed to fall

through a height. While falling the reading in the balance will be:

A. zero B. less than 0.5kg but not zero

C. more than 0.5 kg depending on the height D. 0.5 kg

Answer: (A)

47. Two bars of gold and silver are weighed by spring balance and read 200 gms each.

These bars are then suspended in a liquid and weighed by using the same balance.

What could be derived?

A. Gold will weigh more than silver

B. Silver will weigh more than gold

C. Both the bars will be equal in weight

D. Nothing can be said, unless the density of the liquid is known

Answer: (A)

48. Which one of the following will take place when a watch based on oscillating

spring is taken to a deep mine?

A. It will become slow C. It will indicate the same time as on earth

B. It will become fast D. It will stop working

Answer: (A)

49. Very small-time intervals are accurately measured by the:

A. pulsars B. while dwarfs C. atomic clocks D. quartz clocks

Answer: (C)

50. Match the following:

List I List II

a. Cusec 1. Pressure

b. Byte 2. Intensity of Earthquake


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c. Ricter 3. Rate of Flow

d. Bar 4. Computer Memory

A. a4, b1, c2, d3

B. a2, b4, c3, d1

C. a3, b4, c2, d1

D. a3, b2, c1, d4

Answer: (C)

If you do not hope, you will not find what is beyond your hopes.

All the best

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