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ONLINE MCQ ME-Heat Transfer 1

Harikesh Yadav
Q1. Unit of thermal conductivity in M.K.S. units is
 A.  kcal/kg m2 °C
 [Wrong Answer]		  B.  kcal-m/hr m2 °C
 [Correct Answer]
 C.  kcal/hr m2 °C
 [Wrong Answer]		  D.  kcal-m/hr °C
 [Wrong Answer]
 E.  kcal-m/m2 °C.
 [Wrong Answer]
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Q2. Unit of thermal conductivity in S.I. units is
 A.  J/m2 sec
 [Wrong Answer]		  B.  J/m °K sec
 [Wrong Answer]
 C.  W/m °K
 [Wrong Answer]		  D.  (a) and (c) above
 [Wrong Answer]
 E.  (b) and (c) above.
 [Correct Answer]
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Q3. Thermal conductivity of solid metals with rise in temperature normally
 A.  increases
 [Wrong Answer]		  B.  decreases
 [Correct Answer]
 C.  remains constant
 [Wrong Answer]		  D.  may increase or decrease depending on temperature
 [Wrong Answer]
 E.  unpredictable.
 [Wrong Answer]
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Q4. Thermal conductivity of non-metallic amorphous solids with decrease in temperature
 A.  increases
 [Wrong Answer]		  B.  decreases
 [Correct Answer]
 C.  remains constant
 [Wrong Answer]		  D.  may increase or decrease depending on temperature
 [Wrong Answer]
 E.  unpredictable.
 [Wrong Answer]
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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
 [Correct Answer]		  B.  convection
 [Wrong Answer]
 C.  radiation
 [Wrong Answer]		  D.  conduction and convection
 [Wrong Answer]
 E.  convection and radiation.
 [Wrong Answer]
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