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Power Engineering 5

Instructions:

Answer 40 questions in 15 minutes.
If you are not ready to take this test, you can study here.
Match each statement with the correct term.
Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.

1. The jet condenser is so named because...
A controlled process of removing heat from a substance
Calcium chloride
It sprays jets of cooling water into the exhaust steam to condense it
1. imperfect injection 2. worn injectors 3. injection timed too early 4. improper grade of fuel

2. In a dual shaft gas turbine the load is driven by a
Low pressure turbine
Level
Forged steel
1. little or no water requirements 2. low installation cost 3. high power to mass ratio

3. The free piston gas generator in a gas turbine cycle will take the place of...
Not mix with mineral oils
1. RPM's decrease 2. centrifugal force on governor decreases 3. spring causes governor flyballs to move inward4. governor linkage causes steam valve to open 5. more steam is admitted 6. RPM's increase
1. rotate the turbine shaft periodically to prevent it from sagging 2. rotate the shaft at slow speed when the turbine is not in service
The compressor and combustor

4. The component that allows for the switching from heating to cooling mode on an air heat pump is called a/an __________ valve?
To rid the system of non - condensable gases
B2
Reversing
Calcium chloride

5. The condenser extraction (condensate) pump normally supplies cooling Water to the...
1. RPM's decrease 2. centrifugal force on governor decreases 3. spring causes governor flyballs to move inward4. governor linkage causes steam valve to open 5. more steam is admitted 6. RPM's increase
The liquid refrigerant absorbs heat and boils
1. Turbine casing drain coolers 2. gland steam condensers 3. air ejectors
1. high temperature application 2. where chemical contamination is possible 3. on electrical equipment

6. In order to keep the gas pass of a gas turbine clean - the following must be done
1. decrease steam pressure 2. increase steam
B2
1. imperfect injection 2. worn injectors 3. injection timed too early 4. improper grade of fuel
1. inspect and clean air intake filters 2. inspect and clean air intake ducts 3. water wash the compressor blades 4. use good quality fuel

7. The purpose of the expansion valve is to...
At least as large as the compressor intake
1. little or no water requirements 2. low installation cost 3. high power to mass ratio
Regulate the flow of refrigerant to the evaporator
Not mix with mineral oils

8. During the start- up of some reaction steam turbines - the thrust block is pushed against a stop in the direction of the inlet for...
Is corrosive to non - ferrous metals in the presence of water
To remove heat from the condensing water
Maximum axial seal clearance
1. little or no water requirements 2. low installation cost 3. high power to mass ratio

9. NH3 (R-717) refrigerant
Cooling and aerating the steam in a steam condenser
The fuel is injected into the cylinder by the injector
Is corrosive to non - ferrous metals in the presence of water
1. what the relative humidity is. 2. what the dew point is. 3. how much moisture is in the air. 4. what the dryness factor is.

10. The purpose of a thrust bearing is to...
Not mix with mineral oils
The liquid refrigerant absorbs heat and boils
Calcium chloride
Prevent the shaft from moving axially with the thrust

11. Ammonia refrigerant will
Not mix with mineral oils
Solenoid valves
1. increases the pressure 2. retards heat transfer 3. is cooled before being removed
1. sliding vane 2. rotary lobe 3. rotary screw

12. Connecting rods are usually made of...
1. rotate the turbine shaft periodically to prevent it from sagging 2. rotate the shaft at slow speed when the turbine is not in service
Generator - condenser - receiver - expansion valve - evaporator - absorber - aqua pump.
Forged steel
B2

13. In the internal combustion engine - the purpose of the rocker arm is to operate
Level
The inlet valves
To rid the system of non - condensable gases
1. increases the pressure 2. retards heat transfer 3. is cooled before being removed

14. Of all the positive displacement air compressors - the ______ compressor can deliver the highest discharge pressure.
B2
The compressor and combustor
To rid the system of non - condensable gases
Reciprocating

15. The main purpose of a cooling tower is to...
The fuel is injected into the cylinder by the injector
1. RPM's decrease 2. centrifugal force on governor decreases 3. spring causes governor flyballs to move inward4. governor linkage causes steam valve to open 5. more steam is admitted 6. RPM's increase
To remove heat from the condensing water
1. little or no water requirements 2. low installation cost 3. high power to mass ratio

16. Three different designs of rotary compressors are...
1. what the relative humidity is. 2. what the dew point is. 3. how much moisture is in the air. 4. what the dryness factor is.
1. decrease steam pressure 2. increase steam
To rid the system of non - condensable gases
1. sliding vane 2. rotary lobe 3. rotary screw

17. Condenser cooling water is usually controlled by...
Calcium chloride
Solenoid valves
The inlet valves
To rid the system of non - condensable gases

18. Surging of dynamic air compressors can produce severe shock to the system and may be violent enough to damage the...
Blading - shaft - and seals
Regulate the flow of refrigerant to the evaporator
It sprays jets of cooling water into the exhaust steam to condense it
1. Turbine casing drain coolers 2. gland steam condensers 3. air ejectors

19. The deaerator is usually operated to maintain constant
1. high temperature application 2. where chemical contamination is possible 3. on electrical equipment
Not mix with mineral oils
The liquid refrigerant absorbs heat and boils
Level

20. Compressed air is not used for...
Cooling and aerating the steam in a steam condenser
1. little or no water requirements 2. low installation cost 3. high power to mass ratio
1. sliding vane 2. rotary lobe 3. rotary screw
Maximum axial seal clearance

21. Barring or turning gears are used to...
To remove heat from the condensing water
Regulate the flow of refrigerant to the evaporator
1. rotate the turbine shaft periodically to prevent it from sagging 2. rotate the shaft at slow speed when the turbine is not in service
B2

22. For a particular air sample - wet and dry bulb temperatures when plotted on a psychometric chart will help determine
Is corrosive to non - ferrous metals in the presence of water
1. what the relative humidity is. 2. what the dew point is. 3. how much moisture is in the air. 4. what the dryness factor is.
The compressor and combustor
Solenoid valves

23. Air in a surface condenser
To remove heat from the condensing water
1. design - construction and installation of refrigerating systems 2. operation and inspection of refrigerating systems
1. Drain the condensate from steam line and turbine casing. 2. Check oil level in bearing sumps or reservoir.
1. increases the pressure 2. retards heat transfer 3. is cooled before being removed

24. Refrigeration systems are purged
A controlled process of removing heat from a substance
Solenoid valves
To rid the system of non - condensable gases
At least as large as the compressor intake

25. Refrigeration may be defined as...
A controlled process of removing heat from a substance
At least as large as the compressor intake
1. fuel costs are high 2. the operating noise level is high 3. low thermal efficiency
1. inspect and clean air intake filters 2. inspect and clean air intake ducts 3. water wash the compressor blades 4. use good quality fuel

26. In the common rail system used for injection of fuel into the diesel engine cylinder
The fuel is injected into the cylinder by the injector
Blading - shaft - and seals
1. imperfect injection 2. worn injectors 3. injection timed too early 4. improper grade of fuel
Reaction turbine

27. Ammonia (R-717) is classified in Safety Group
B2
Regulate the flow of refrigerant to the evaporator
Cooling and aerating the steam in a steam condenser
1. design - construction and installation of refrigerating systems 2. operation and inspection of refrigerating systems

28. Solid lubricants are used for...
Reciprocating
Maximum axial seal clearance
1. high temperature application 2. where chemical contamination is possible 3. on electrical equipment
1. decrease steam pressure 2. increase steam

29. Steam turbine stationary nozzles serve to...
1. decrease steam pressure 2. increase steam
A controlled process of removing heat from a substance
Level
1. rotate the turbine shaft periodically to prevent it from sagging 2. rotate the shaft at slow speed when the turbine is not in service

30. Brine used in ammonia indirect systems is usually made with
Blading - shaft - and seals
To rid the system of non - condensable gases
Calcium chloride
Reciprocating

31. CSA B-52 applies to...
1. imperfect injection 2. worn injectors 3. injection timed too early 4. improper grade of fuel
1. design - construction and installation of refrigerating systems 2. operation and inspection of refrigerating systems
Reaction turbine
1. increases the pressure 2. retards heat transfer 3. is cooled before being removed

32. A gas turbine would be chosen where these characteristics are advantageous
Low pressure turbine
Calcium chloride
Is corrosive to non - ferrous metals in the presence of water
1. little or no water requirements 2. low installation cost 3. high power to mass ratio

33. The disadvantages of a gas turbine include
1. fuel costs are high 2. the operating noise level is high 3. low thermal efficiency
1. inspect and clean air intake filters 2. inspect and clean air intake ducts 3. water wash the compressor blades 4. use good quality fuel
1. high temperature application 2. where chemical contamination is possible 3. on electrical equipment
Generator - condenser - receiver - expansion valve - evaporator - absorber - aqua pump.

34. A pressure drop created across the turbine blades by the expanding steam is the basic operating principle of the...
Reaction turbine
1. Turbine casing drain coolers 2. gland steam condensers 3. air ejectors
1. little or no water requirements 2. low installation cost 3. high power to mass ratio
B2

35. The evaporator is where
At least as large as the compressor intake
1. Turbine casing drain coolers 2. gland steam condensers 3. air ejectors
The liquid refrigerant absorbs heat and boils
The inlet valves

36. If the speed of a turbine decreases due to additional generator loading - the correct sequence of events that occurs in the speed governor is as follows

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37. Rough running of a diesel engine is caused by...
B2
Not mix with mineral oils
1. decrease steam pressure 2. increase steam
1. imperfect injection 2. worn injectors 3. injection timed too early 4. improper grade of fuel

38. The main components of an lithium bromide absorption refrigeration system are...
Maximum axial seal clearance
Reaction turbine
Generator - condenser - receiver - expansion valve - evaporator - absorber - aqua pump.
1. Drain the condensate from steam line and turbine casing. 2. Check oil level in bearing sumps or reservoir.

39. Before starting a small non - condensing turbine which of the following procedures would be performed?
Solenoid valves
Prevent the shaft from moving axially with the thrust
1. increases the pressure 2. retards heat transfer 3. is cooled before being removed
1. Drain the condensate from steam line and turbine casing. 2. Check oil level in bearing sumps or reservoir.

40. The inlet pipe to the compressor must be...
At least as large as the compressor intake
Maximum axial seal clearance
1. rotate the turbine shaft periodically to prevent it from sagging 2. rotate the shaft at slow speed when the turbine is not in service
Reversing