Our website is made possible by displaying online advertisements to our visitors. Please consider supporting us by whitelisting our website.

Chemical Heat Transfer

A backward feed multiple effect evaporator is better than forward feed for concentrating cold feed, because it provides __________________?

Chemical Heat Transfer /
A backward feed multiple effect evaporator is better than forward feed for concentrating cold feed, because it provides __________________?

A. Higher economy
B. Lower capacity
C. Both A. & B.
D. Lower economy

A backward feed multiple effect evaporator is better than forward feed for concentrating cold feed, because it provides __________________? Read More »

Chemical Heat Transfer

1000 Kg of liquid at 30°C in a well stirred vessel has to be heated to 120°C, using immersed coils carrying condensing steam at 150°C. The area of the steam coils is 1.2 m2 and the overall heat transfer co-efficient to the liquid is 1500 W/m2.°C. Assuming negligible heat loss to the surrounding and specific heat capacity of the liquid to be 4 kJ/kg.°C, the time taken for the liquid to reach desired temperature will be__________________?

Chemical Heat Transfer /
1000 Kg of liquid at 30°C in a well stirred vessel has to be heated to 120°C, using immersed coils carrying condensing steam at 150°C. The area of the steam coils is 1.2 m2 and the overall heat transfer co-efficient to the liquid is 1500 W/m2.°C. Assuming negligible heat loss to the surrounding and specific heat capacity of the liquid to be 4 kJ/kg.°C, the time taken for the liquid to reach desired temperature will be__________________?

A. 15 min
B. 22 min
C. 44 min
D. 51 min

1000 Kg of liquid at 30°C in a well stirred vessel has to be heated to 120°C, using immersed coils carrying condensing steam at 150°C. The area of the steam coils is 1.2 m2 and the overall heat transfer co-efficient to the liquid is 1500 W/m2.°C. Assuming negligible heat loss to the surrounding and specific heat capacity of the liquid to be 4 kJ/kg.°C, the time taken for the liquid to reach desired temperature will be__________________? Read More »

Chemical Heat Transfer

If air (a non-condensing gas) is present in a condensing vapor stream, it will ______________ the condensation rate of vapor?

Chemical Heat Transfer /
If air (a non-condensing gas) is present in a condensing vapor stream, it will ______________ the condensation rate of vapor?

A. Increase
B. Decrease
C. Not affect
D. Increase the condensing film co-efficient as well as

If air (a non-condensing gas) is present in a condensing vapor stream, it will ______________ the condensation rate of vapor? Read More »

Chemical Heat Transfer

A fluid is flowing inside the inner tube of a double pipe heat exchanger with diameter ‘d’. For a fixed mass flow rate, the tube side heat transfer co-efficient for turbulent flow conditions is proportional to_____________________?

Chemical Heat Transfer /
A fluid is flowing inside the inner tube of a double pipe heat exchanger with diameter ‘d’. For a fixed mass flow rate, the tube side heat transfer co-efficient for turbulent flow conditions is proportional to_____________________?

A. d0.8
B. d-0.2
C. d-1
D. d-1.8

A fluid is flowing inside the inner tube of a double pipe heat exchanger with diameter ‘d’. For a fixed mass flow rate, the tube side heat transfer co-efficient for turbulent flow conditions is proportional to_____________________? Read More »

Chemical Heat Transfer

Heat transfer co-efficient (h) for a fluid flowing inside a clean pipe is given by h = 0.023 (K/D) (DVρ/μ)0.8 (CP.μ/k)0.4. This is valid for the value of NRe equal to_______________?

Chemical Heat Transfer /
Heat transfer co-efficient (h) for a fluid flowing inside a clean pipe is given by h = 0.023 (K/D) (DVρ/μ)0.8 (CP.μ/k)0.4. This is valid for the value of NRe equal to_______________?

A. 4000
D. > 10000

Heat transfer co-efficient (h) for a fluid flowing inside a clean pipe is given by h = 0.023 (K/D) (DVρ/μ)0.8 (CP.μ/k)0.4. This is valid for the value of NRe equal to_______________? Read More »

Chemical Heat Transfer