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Chapter 1: Heat and Temperature MCQ-8 (in Hindi)
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In this lesson discuss the Heat and temperature most important MCQ's for Railway examinations.

Vishal Garg
Mechanical Engineer | Unacademy Plus Educator | Railway Category Expert | Follow me to learn Reasoning |

U
Unacademy user
Sir, Many many thanks aapnake
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  4. 40. Temperature of core of earth is equal to 3727 C. This temperature in Kelvins is equal to (a) 4000K (c) 3454HK Boiling point of mercury is equal to 630 K. This temperature in Celsius is equal to (a) 357 C (c) 903 0 (b) 3727K (d) None of above 41. (b) 630 0C (d) None of above


  5. 42. Heat capacity of a substance is (a) inversely proportional to change in temperature (b) directly proportional to change in temperature (c) inversely proportional to square of change in temperature (d) independent of change in temperature Heat capacity of a substance is defined as (a) amount of heat required to raise temperature of a 43. substance by 1 K (b) amount of heat required to raise temperature of a substance by 1 C (c) specific heat capacity x mass of substance (d) All of above


  6. Heat applied to a piece of metal will cause (a) (b) (c) (d) Heat capacity of a substance is equal to (a) amount of heat required to raise temperature ofa 1 kg 44. increase in its mass increase in its volume increase in its density increase in its internal energy 45. (b) amount of heat required to raise temperature of a (c) amount of heat required to change phase of a (d) amount of heat required to change phase of a of a substance by 1 K substance by 1 K substance from solid to liquid without any change in temperature substance from liquid to gas without any change in temperature


  7. The form of energy that flows from a hot objec object is called_ (a) Temperature (b) Thermometeir (c) Heat (d) Light One litre of water at 30 C is mixed with one litre ofwatera 50 C. The temperature ofthe mixture will be (a) 80 0c (b) more than 50 C but less than 80 C (c) 20 C (d) between 30 C and 50 C 46. t to a cold 47.


  8. 48. An iron ball at 40 C is dropped in a mug containing water ar 40 C. The heat will (a) flow firom iron ball to water (b) not flow from iron ball to water or from water to iron ball flow from water to iron ball increase the temperature of both (c) (d) Higher the temperature of the body energy of the molecules of that body? (a) higher (c) same A polished silvery surface is (a) A polished silvery surface is (b) good reflector of heat (c) poor reflector ofheat (d) None of these 49. is the kineti (b) lower (d) none of thesee 50.