# ONLINE MCQ ME-Heat Transfer 1

Q1. Unit of thermal conductivity in M.K.S. units is
A.  kcal/kg m2 °C
B.  kcal-m/hr m2 °C
C.  kcal/hr m2 °C
D.  kcal-m/hr °C
E.  kcal-m/m2 °C.
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Q2. Unit of thermal conductivity in S.I. units is
A.  J/m2 sec
B.  J/m °K sec
C.  W/m °K
D.  (a) and (c) above
E.  (b) and (c) above.
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Q3. Thermal conductivity of solid metals with rise in temperature normally
A.  increases
B.  decreases
C.  remains constant
D.  may increase or decrease depending on temperature
E.  unpredictable.
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Q4. Thermal conductivity of non-metallic amorphous solids with decrease in temperature
A.  increases
B.  decreases
C.  remains constant
D.  may increase or decrease depending on temperature
E.  unpredictable.
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Q5. When
heat is transferred from one particle of hot body to another by actual
motion of the heated particles, it is referred to as heat transfer by
A.  conduction