Top 1000+ Solved Heat Transfer (HT) MCQ Questions Answer

a. Peclet

b. Prandtl

c. Stanton

d. Nusselt

a. Basket type

b. Horizontal tube

c. Calandria

d. None of these

a. Flow of fluid on the tube and shell sides

b. Oscillations in the flow of shell/tube sides fluid

c. Vibrations transmitted through piping and/or supports due to external reasons

d. All (A), (B) and (C)

a. Orifice baffles are never used in a shell and tube heat exchanger

b. Pressure drop on the shell side of a heat exchanger depends upon tube pitch also

c. In a horizontal tube evaporator, surface blanketing by air is avoided

d. Split ring type and pull through type floating heads are two commonly used floating heads is heat exchangers

a. 1

b. > 1

c. < 1

d. 0.1

a. 50 -100 Kcal/hr.m2.°C

b. 50 -100 W/m2.°K

c. 50 -100 BTU/hr. ft.2°F

d. 1000 - 1500 BTU/hr. ft.2°F

a. 1

b. 1.74

c. 6.1

d. 37

a. Increase the cross-section of the shell side liquid

b. Force the liquid to flow parallel to the bank

c. Increase the shell side heat transfer co-efficient

d. Decrease the shell side heat transfer co-efficient

a. Dirhing's

b. Heisler's

c. Mollier's

d. Cox

a. 10-50

b. 100-500

c. 1000-1500

d. 5000-15000

a. No

b. The least

c. The largest

d. Lower

a. Facilitate the cleaning of outer tube surface

b. Enhance turbulence

c. Hold the tubes in position

d. All 'a', 'b' & 'c'

a. The capacity of an evaporator is reduced by the boiling point elevation

b. Corrosive liquid is normally passed through the tubes in a shell and tube heat exchanger

c. Steam jet ejector is used for vapor compression in a thermal recompression evaporator

d. Heat sensitive materials should be concentrated in high pressure evaporators

a. Increases rapidly with temperature rise

b. Decreases rapidly with temperature rise

c. In independent of pressure

d. Both (B) and (C)

a. Lewis relationship

b. Nusselt number

c. Kutateladze number

d. Froude number