1363. Prandtl number for most of dry gases is about
0.001
0.72
70
150
✅ The correct answer is option B.
1366. Heat flux, as defined in heat flow is analogous to __________ in electricity flow.
Current
Voltage
Resistance
None of these
✅ The correct answer is option A.
1369. Circulation pump is located below the evaporater to
Avoid cavitation
Avoid frequent priming
Create more suction head
None of these
✅ The correct answer is option C.
1334. In a liquid-liquid heat exchanger, for the same process temperature, the ratio of the LMTD in parallel flow to the LMTD in counter flow is always
< 1
> 1
1
∞
✅ The correct answer is option A.
1337. For a fluid flowing in an annulus space, the wetted perimeter for heat transfer and pressure drop are
Same
Different
Never different
Linearly related
✅ The correct answer is option B.
1340. Fouling factor
Is a dimensionless quantity
Does not provide a safety factor for design
Accounts for additional resistances to heat flow
None of these
✅ The correct answer is option C.
1342. To reduce the tube side pressure drop for the same flow rate, the heat exchanger recomended is
1-2 heat exchanger
1-1 heat exchanger
3-2 heat exchanger
2-4 heat exchanger
✅ The correct answer is option B.
1344. Electro-magnetic spectrum range, which is important for radiation varies from __________ microns.
1 to 100
0.5 to 50
10 to 100
100 to 1000
✅ The correct answer is option B.
1346. The steam ejector is used to
Remove condensate from the steam pipelines
Create vacuum
Superheat the steam
None of these
✅ The correct answer is option B.
1348. In the free convection regime of pool boiling, the heat flux is proportional to
Δt1/2
Δt2
Δt5/4
Δt
✅ The correct answer is option C.