Power Engineering 3B2 - Chapter 3 Questions With
Complete Solutions
A _____ works on the principle of cool air contacting and
removing heat from warm water.
a. Shell and tube exchanger.
b. Circulating pump.
c. Cooling tower.
d. Evaporator.
e. Deaerator. Correct Answers C
A condenser is most efficient when:
1. Only sensible heat is removed.
2. Only latent heat is removed.
3. No sensible heat is removed.
4. No latent heat is removed.
5. A combination of latent and sensible heat is removed.
a. 1, 2
b. 2, 3
c. 3, 4
d. 3, 4
e. 5 Correct Answers B
A condenser shell may be fitted with an expansion joint if the:
a. Expected temperature differentials will be greater than 20 C.
b. Condenser tubes are U-shaped.
c. Condenser is of welded construction.
d. Condenser tubes are expanded into the tube sheets.
e. Tube sheets are made of Admiralty brass. Correct Answers D
,A condenser's tube arrangement that makes it possible to reheat
and deaerate the condensate with available steam in the
condenser is termed
a. Regenerative.
b. Degenerative.
c. Progressive.
d. Cumulative.
e. Administrative. Correct Answers A
A group title "heat exchanger" would include:
1. Air heaters.
2. Oil coolers.
3. Oil burners.
4. Chimney.
5. Air heater.
6. Electrostatic precipitator.
7. Forced draft fan.
8. Deaerator.
a. 3, 5, 7.
b. 4, 6, 8.
c. 1, 2, 5, 8.
d. 1, 3, 6, 8.
e. 2, 4, 5, 7. Correct Answers C
A high condensate level:
a. Is difficult to detect.
b. Decreases the backpressure of the turbine.
c. Could cause non-condensable gases to accumulate in the
condenser.
d. Is caused by faulty extraction pumps.
, e. Could be caused by a malfunctioning rupture disc. Correct
Answers C
A pressure relief valve is fitted to the water, side of a feedwater
heater in case:
a. The level control on the deaerator shuts-off.
b. Of expansion of the water when the waterside is isolated.
c. The temperature of the water becomes excessive.
d. The level in feed water heater is too high.
e. The steam pressure is excessive. Correct Answers B
A safety valve is fitted on the _____ side of a feedwater heater.
a. Under
b. Water
c. Water and steam
d. Top of the water
e. Steam Correct Answers E
A surface condenser may be ________________ .
1) oval
2) triangular
3) cylindrical
4) rectangular
5) hexagon
a. 1, 2, 3
b. 2, 3, 4
c. 3, 4, 5
d. 1, 2, 5
e. 1, 3, 4 Correct Answers E
Complete Solutions
A _____ works on the principle of cool air contacting and
removing heat from warm water.
a. Shell and tube exchanger.
b. Circulating pump.
c. Cooling tower.
d. Evaporator.
e. Deaerator. Correct Answers C
A condenser is most efficient when:
1. Only sensible heat is removed.
2. Only latent heat is removed.
3. No sensible heat is removed.
4. No latent heat is removed.
5. A combination of latent and sensible heat is removed.
a. 1, 2
b. 2, 3
c. 3, 4
d. 3, 4
e. 5 Correct Answers B
A condenser shell may be fitted with an expansion joint if the:
a. Expected temperature differentials will be greater than 20 C.
b. Condenser tubes are U-shaped.
c. Condenser is of welded construction.
d. Condenser tubes are expanded into the tube sheets.
e. Tube sheets are made of Admiralty brass. Correct Answers D
,A condenser's tube arrangement that makes it possible to reheat
and deaerate the condensate with available steam in the
condenser is termed
a. Regenerative.
b. Degenerative.
c. Progressive.
d. Cumulative.
e. Administrative. Correct Answers A
A group title "heat exchanger" would include:
1. Air heaters.
2. Oil coolers.
3. Oil burners.
4. Chimney.
5. Air heater.
6. Electrostatic precipitator.
7. Forced draft fan.
8. Deaerator.
a. 3, 5, 7.
b. 4, 6, 8.
c. 1, 2, 5, 8.
d. 1, 3, 6, 8.
e. 2, 4, 5, 7. Correct Answers C
A high condensate level:
a. Is difficult to detect.
b. Decreases the backpressure of the turbine.
c. Could cause non-condensable gases to accumulate in the
condenser.
d. Is caused by faulty extraction pumps.
, e. Could be caused by a malfunctioning rupture disc. Correct
Answers C
A pressure relief valve is fitted to the water, side of a feedwater
heater in case:
a. The level control on the deaerator shuts-off.
b. Of expansion of the water when the waterside is isolated.
c. The temperature of the water becomes excessive.
d. The level in feed water heater is too high.
e. The steam pressure is excessive. Correct Answers B
A safety valve is fitted on the _____ side of a feedwater heater.
a. Under
b. Water
c. Water and steam
d. Top of the water
e. Steam Correct Answers E
A surface condenser may be ________________ .
1) oval
2) triangular
3) cylindrical
4) rectangular
5) hexagon
a. 1, 2, 3
b. 2, 3, 4
c. 3, 4, 5
d. 1, 2, 5
e. 1, 3, 4 Correct Answers E
