Heat Transfer MCQ with Answer.

Check below heat transfer mcq with answer for exam preperation.

Q.no.1 The heat is transferred in the direction of decreasing temperature is a statement of

A : First law of thermodynamic
B : Second law of thermodynamic
C : Third law of thermodynamic
D : Law of consrvation of mass

Q.no 2. If average heat transfer co-efficient is ha and the local coefficient at the end of the plate is hl then in case of heat transfer to a fluid flowing over a flat plate, heated over its entire length

A : ha= hl
B : ha= 2hl
C : ha= 0.5hl
D : ha= 0.75hl

Q.no 3. For an ideal black body

A : Absorptivity =1
B : Reflectivity =1
C : Emissivity = 0
D : Transmitivity =1

Q.no 4. Nusselt number for full developed, laminar, constant property flow in a pipe at uniform heat flux is

A : 0.72
B : 4.364
C : 18
D : 83

Q.no 5. Which of the following is concerned with both heat and mass transfer

A : Lewis relationship
B : Nusselt number
C : Kutateladze number
D : Froude number

Q.no 6. Radiation shape factor is also known as

A : View factor
B : Friction factor
C : Angle factor
D : None of these

Q.no 7. According to Reynolds analogy, Stanton number is equal to (where, f = Fanning friction factor)

A : 2f
B : f
C : f/2
D : f/4

Q.no 8. The characteristic dimensionless groups for heat transfer to a fluid flowing through a pipe in laminar flow are

A : Re.Gz
B : Nu, Pr
C : Nu, Pr, Re
D : Nu, Gz

Q.no 9. For flow over a flat plate, the ratio of thermal boundary layer thickness, δt’ to hydrodynamic boundary layer thickness ‘δ’ is proportional to (where, NPr = Prandtl number)

A : NPr
B : NPr1/3
C : NPr-1
D : NPr-1/3

Answer for Question No 1. is b
Answer for Question No 2. is b
Answer for Question No 3. is a
Answer for Question No 4. is b
Answer for Question No 5. is a
Answer for Question No 6. is a
Answer for Question No 7. is c
Answer for Question No 8. is d
Answer for Question No 9. is d
Answer for Question No 10. is c