Science & Technology Questions for IAS Perlims - Set 4

Science & Technology Questions for IAS Perlims - Set 4


1. The mass of a body is different from its weight because

a. Mass is a variable quantity whereas weight is constant.

b. Mass varies very little at different places whereas weight varies a lot.

c. Mass is constant but weight decreases as the body moves from the poles to the equator.

d. Weight is measure of the quantity of matter whereas mass is a force.

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ANSWER: c. Mass is constant but weight decreases as the body moves from the poles to the equator.



2. The science dealing with the study of phenomena at very low temperature is known as

a. Refrigenics
b. Cytogenics
c. Frozenics
d. Cryogenics

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ANSWER: d. Cryogenics



3. Which of the following is Not a primary colour

a. Blue
b. Yellow
c. Red
d. Green

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ANSWER: b. Yellow



4. To an astronaut, the outer space appears

a. White
b. Blue
c. Yellow
d. Black

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ANSWER: d. Black



5. Which of the following statements are Not correct

a. Value of g decreases with height or depth from earth's surface
b. g is maximum at poles
c. g Is minimum at equator
d. g increases due to rotation of earth

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ANSWER: d. g increases due to rotation of earth



6. Frequency of audible sound is

a. 20 Hz -2000Hz
b. 20 Hz to 20000 Hz
c. 200Hz to 20000Hz
d. Above 20000 Hz

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ANSWER: b. 20 Hz to 20000 Hz



7. Which of the following is not a mode of transmission of heat

a. Evaporation
b. Conduction
c. Convection
d. Radiation

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ANSWER: a. Evaporation



8. Ohm is the unit of

a. Voltage
b. Current
c. Resistance
d. Conductance

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ANSWER: c. Resistance



9. Optical fibres works on the principle of

a. Total Internal Reflection of light
b. Refraction of light
c. Reflection of light
d. Dispersion of light

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ANSWER: a. Total Internal Reflection of light



10. Two isotopes have

a. Same number of neutrons
b. Same number of protons
c. Same mass number
d. None of the above

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ANSWER: b. Same number of protons


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