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Dear candidates you will find MCQ questions of Heat Transfer here. Learn these questions and prepare yourself for coming examinations and interviews. You can check the right answer of any question by clicking on any option or by clicking view answer button.

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Mr. Dubey • 51.47K Points
Coach

Q. 591) Trap is used to remove __________ from steam pipe lines.

(A) Steam
(B) Condensate
(C) Non-condensable
(D) None of these
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M

Mr. Dubey • 51.47K Points
Coach

Q. 592) Prandtl number is given by

(A) CP µ/a
(B) hD/k
(C) CP µ/k
(D) µ/h CP
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Mr. Dubey • 51.47K Points
Coach

Q. 593) Pick out the wrong statement:

(A) With change in temperature, the radiant energy emitted by a black body remains unchanged
(B) Absorptivity of a body approaches unity in case of diffuse reflection
(C) Absorptivity of a perfectly black body is unity
(D) Value of Stefan-Boltzmann constant is 4.876 × 10-8 KCal/m2 .hr.°K4
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M

Mr. Dubey • 51.47K Points
Coach

Q. 594) Prandtl number is the ratio of

(A) Momentum diffusivity to mass diffusivity
(B) Momentum diffusivity to thermal diffusivity
(C) Thermal diffusivity to mass diffusivity
(D) Thermal diffusivity to momentum diffusivity
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Mr. Dubey • 51.47K Points
Coach

Q. 595) In the free convection regime of pool boiling, the heat flux is proportional to

(A) Δt1/2
(B) Δt2
(C) Δt5/4
(D) Δt
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Mr. Dubey • 51.47K Points
Coach

Q. 596) Radiation heat losses from satisfactorily insulated high pressure boiler may be about __________ percent.

(A) 1
(B) 7
(C) 18
(D) 26
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Mr. Dubey • 51.47K Points
Coach

Q. 597) When vaporisation takes place through a blanketting film of gas, the phenomenon is termed as __________ boiling.

(A) Pool
(B) Nucleate
(C) Transition
(D) Film
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Mr. Dubey • 51.47K Points
Coach

Q. 598) In SI units, fouling factor is expressed in

(A) m2°K/W
(B) W/m2°K
(C) m2°K
(D) m°K/W
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Mr. Dubey • 51.47K Points
Coach

Q. 599) Kg of liquid evaporated per hour in an evaporator is defined as its

(A) Capacity
(B) Economy
(C) Steam load
(D) None of these
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Mr. Dubey • 51.47K Points
Coach

Q. 600) The left face of a one dimensional slab of thickness 0.2 m is maintained at 80°C and the right face is exposed to air at 30°C. The thermal conductivity of the slab is 1.2 W/m.K and the heat transfer co-efficient from the right face is 10 W/m2 .K. At steady state, the temperature of the right face in °C is

(A) 77.2
(B) 71.2
(C) 63.8
(D) 48.7
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