Class 7 Science MCQs - Chapter 11
Heat Transfer Quiz Questions & Answers PDF Download - 15
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Heat Transfer Exam Questions and Answers PDF Download: Test 15
The loss of heat in winter is a major waste of
- fuel
- electricity
- power
- energy
Low 'infrared waves'
- cannot pass through glass
- can pass through glass
- cannot pass through walls
- can pass through walls
Electric companies use thermal imaging camera to identify
- the resistivity of a wire
- the resistivity of a resistor
- overheating of wires and power lines
- the heat released by electrical appliance
At night, the convection current of land and sea
- remains same
- stops
- is reversed
- is converted to radiation current
When heating element from cooker is turned out, at first it emits
- heat energy
- gamma rays
- infrared waves
- radio waves
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