Question: Corrosiveness of steam condensate is due to the presence of
[A].CO2
dissolved O2
both (a) & (b)
neither (a) nor (b)
[A].
[B].
[C].
[D].
Answer: Option C
Explanation:
No answer description available for this question.
In a shell and tube heat exchanger, the tube side heat transfer co-efficient just at the entrance of the tube is
Question: In a shell and tube heat exchanger, the tube side heat transfer co-efficient just at the entrance of the tube is
[A].infinity.
zero.
same as average heat transfer co-efficient for tube side.
none of these.
[A].
[B].
[C].
[D].
Answer: Option A
Explanation:
No answer description available for this question.
The average heat transfer co-efficient for laminar film condensation on vertical surface is inversely proportional to (where, ΔT = Temperature drop across condensate film )
Question: The average heat transfer co-efficient for laminar film condensation on vertical surface is inversely proportional to (where, ΔT = Temperature drop across condensate film )
[A].(ΔT)2
ΔT
(ΔT)1/4
(ΔT)3/2
[A].
[B].
[C].
[D].
Answer: Option C
Explanation:
No answer description available for this question.
At what value of Prandtl number, the hydrodynamic and thermal boundary layers are identical ?
Question: At what value of Prandtl number, the hydrodynamic and thermal boundary layers are identical ?
[A].0.5
1
1.5
80
[A].
[B].
[C].
[D].
Answer: Option B
Explanation:
No answer description available for this question.
Conductance is given by(where, x = thickness, A = heat flow area, K = thermal conductivity.)
Question: Conductance is given by(where, x = thickness, A = heat flow area, K = thermal conductivity.)
[A].x/KA
KA/x
K/Ax
A/Kx
[A].
[B].
[C].
[D].
Answer: Option B
Explanation:
No answer description available for this question.
In SI units, fouling factor is expressed in
Question: In SI units, fouling factor is expressed in
[A].m2°K/W
W/m2°K
m2°K
m°K/W
[A].
[B].
[C].
[D].
Answer: Option A
Explanation:
No answer description available for this question.
In SI units, thermal conductivity is expressed in
Question: In SI units, thermal conductivity is expressed in
[A].Watt/m.°K
Watt/m2. °K
Watt/m2. °K
Watt/m4. °K
[A].
[B].
[C].
[D].
Answer: Option A
Explanation:
No answer description available for this question.
Circulation pump is located below the evaporater to
Question: Circulation pump is located below the evaporater to
[A].avoid cavitation.
avoid frequent priming.
create more suction head.
none of these.
[A].
[B].
[C].
[D].
Answer: Option C
Explanation:
No answer description available for this question.
Evaporator tubes are generally
Question: Evaporator tubes are generally
[A].horizontal
vertical
inclined
random
[A].
[B].
[C].
[D].
Answer: Option B
Explanation:
No answer description available for this question.
LMTD can’t be used as such without a correction factor for the
Question: LMTD can’t be used as such without a correction factor for the
[A].multipass heat exchanger.
baffled heat exchanger.
condensation of mixed vapour in a condenser.
all (a) (b) and (c).
[A].
[B].
[C].
[D].
Answer: Option D
Explanation:
No answer description available for this question.