1. 0.16
2. 0.58
3. 0.72
4. 1.0
0.58
1. Condenses and boilers in steam plants
2. Radiators
3. Intercoolers and pre heaters
4. Condenses and evaporators in refrigerators and air conditioners
5. All of these
All of these
1. Maximum possible
2. Minimum possible
3. Zero
4. Constant
Maximum possible
1. More
2. Less
3. Same
4. None of these
More
1. Counter flow type
2. Parallel flow type
3. Cross flow type
4. Regenerator type
Cross flow type
1. Condition when change in temperature of one steam numerically equals the average driving force
2. Section heat exchanger having surface area 1 m2
3. Section heat exchanger having temperature drop of 10 C
4. None of these
Condition when change in temperature of one steam numerically equals the average driving force
1. Increase pressure drop
2. Decrease pressure drop
3. Regular the flow
4. Avoid deformation of tubes due to thermal expansion
Avoid deformation of tubes due to thermal expansion
1. (thi – tho)/( tci – tco)
2. (thi – tho)/( thi – tci)
3. (tho – thi)/( tci – tco)
4. (tco – thi)/( tci – tco)
(thi – tho)/( thi – tci)
1. tm=Δ t1-Δt2/loge(Δ t1/ Δt2)
2. tm=loge(Δ t1/ Δt2)/ Δ t1-Δt2
3. tm=(Δ t1-Δt2)loge(Δ t1/ Δt2)
4. tm=loge(Δ t1/ Δt2)/ Δ t1/Δt2
tm=Δ t1-Δt2/loge(Δ t1/ Δt2)
1. Direct contact exchanger
2. Regenerator
3. Parallel flow exchanger
4. All of these
Parallel flow exchanger