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PHYSICS MCQ

Unit - 5.4 Transmission Of Heat · ICSE STD 7 (ICSE - English Medium). 5 questions.

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5 questions · timed · auto-graded

MCQ 11 Mark
The process by which impure and warm air inside the room is continuously replaced by fresh air is known as :
  • ✓
    convection
  • B
    ventilation
  • C
    radiation
  • D
    thermal expansion
Answer
Correct option: A.
convection
A
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MCQ 21 Mark
The only liquid at room temperature in which conduction is possible is :
  • A
    water
  • ✓
    mercury
  • C
    benzene
  • D
    alcohol
Answer
Correct option: B.
mercury
B
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MCQ 31 Mark
The fastest mode of transmission of heat is
  • A
    conduction
  • B
    convection
  • ✓
    radiation
  • D
    both (b) and (c)
Answer
Correct option: C.
radiation
C
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MCQ 41 Mark
A loose woolen cloth keeps us warm in winter because :
  • A
    it produces a large amount of heat
  • ✓
    it prevents heat radiation from our body by conduction
  • C
    it prevents heat radiation from our body by convection
  • D
    it prevents heat radiation by the process of radiation
Answer
Correct option: B.
it prevents heat radiation from our body by conduction
B
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MCQ 51 Mark
During day time air becomes warm due to the process of
  • A
    conduction
  • ✓
    convection
  • C
    expansion
  • D
    radiation
Answer
Correct option: B.
convection
B
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MCQ - PHYSICS STD 7 Questions - Vidyadip