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ISRO 2023 Quiz 27 Revision

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Question 1

In the following question, select the related letters from the given alternatives.

ROCK : VSGO : : BELT : ?

Question 2

A solid copper ball of mass 0.5 kg when quenched in a water bath at 30⁰C, cools from 530⁰C to 430⁰C in 10 seconds. What will be the temperature (⁰C) of the ball after the next 10 seconds?

Question 3

If the temperature of the sun is doubled, the rate of energy received on earth will be increased by a factor of

Question 4

Which one of the following have a highest thermal conductivity

Question 5

A wall of 0.5 m thickness is to be constructed from a material which has an average thermal conductivity of 1.4 W/m-K. The wall is to be insulated with a material having an average thermal conductivity of 0.35 W/m-K so that the heat loss per square metre will not exceed 1450 W. Assuming that the inner and outer surface temperature are 1200 °C and 15 °C respectively. The thickness of insulation required is ____ metre.

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ESE & GATE ME General

Dec 5ESE & GATE ME