1. (tc1 – tc2)/(th1 – th2)
2. (th2 – tc2)/(th1 – tc1)
3. (th1 – th2)/(th1 – tc1)
4. (tc2 – tc1)/(th1 – tc1)
(th1 – th2)/(th1 – tc1)
1. 100%
2. 75%
3. 50%
4. Between 25% and 45%
50\%
1. Glazed surface
2. Smooth surface
3. Oil surface
4. Coated surface
Oil surface
1. Parallel flow
2. Counter flow
3. Cross flow
4. Same in all above
Same in all above
1. Equal to that for current flow
2. Greater than that for counter flow
3. Smaller than that for counter flow
4. Very much smaller than that for counter flow
Equal to that for current flow
1. The outlet temperature of the fluid streams is not known as a priori
2. Outlet temperature of the fluid stream is known as a pair
3. The Outlet temperature of the hot fluid stream is known but that of the cold fluid stream is not known as a priori
4. Inlet temperature of the fluid streams is known as a priori
The outlet temperature of the fluid streams is not known as a priori
1. Prevent the stagnation of shell side fluid
2. Improve heat transfer
3. Provide support for tubes
4. All of these
All of these
1. 1 and 2 are correct
2. 2 and 4 are correct
3. 1 and 3 are correct
4. 3 and 4 are correct-
1 and 3 are correct
1. 10 μ
2. 5 μ
3. 0.25 μ
4. 0.025 μ
5 μ
1. To increase overall heat transfer coefficient water side velocity can be increased if water is on the tube side
2. Condenser can act as a storage unit for condensed steam
3. Rate of condensation of stem is invariably smaller than the mass flow rate of cooling water
4. It is easier to maintain vacuum on the shell side than on the tube side
To increase overall heat transfer coefficient water side velocity can be increased if water is on the tube side