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- Heating & Welding Mcqs - Set 5
MCQs 1: Heat is transferred simultaneously by condition, convection and radiation_____________?
inside boiler furnaces
during melting of ice
through the surface of the insulted pipe carrying steam
from refrigerator coils to freezer of a refrigerator
MCQs 2: For the transmission of heat from one body to another__________?
temperature of the two bodies must be different
both bodies must be solids
both bodies must be in contact
at least one of the bodies must have some source of heating
MCQs 3: A perfect black body is one that_____________?
transmits all incident radiations
absorbs all incident radiations
reflects all incident radiations
absorbs, reflects and transmits all incident radiations
MCQs 4: When a body reflects entire radiation incident on it, then it is known as____________?
MCQs 5: is used for heating non-conducting materials?
MCQs 6: _________ has the highest value of thermal conductivity?
MCQs 7: Which of the following heating methods has maximum power factor ?
MCQs 8: Which of the following is an advantage of heating by electricity ?
MCQs 9: method has leading power factor____________?
MCQs 10: Which of the following methods of heating is not dependent on the frequency of supply ?
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