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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. Solid lubricants are used for...
B2
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
1. high temperature application 2. where chemical contamination is possible 3. on electrical equipment
Blading - shaft - and seals

2. Brine used in ammonia indirect systems is usually made with
1. sliding vane 2. rotary lobe 3. rotary screw
A controlled process of removing heat from a substance
Not mix with mineral oils
Calcium chloride

3. For a particular air sample - wet and dry bulb temperatures when plotted on a psychometric chart will help determine
The liquid refrigerant absorbs heat and boils
Regulate the flow of refrigerant to the evaporator
Low pressure turbine
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.

4. Ammonia (R-717) is classified in Safety Group
Is corrosive to non - ferrous metals in the presence of water
B2
1. Turbine casing drain coolers 2. gland steam condensers 3. air ejectors
Generator - condenser - receiver - expansion valve - evaporator - absorber - aqua pump.

5. Compressed air is not used for...
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
Cooling and aerating the steam in a steam condenser
The compressor and combustor
Not mix with mineral oils

6. Barring or turning gears are used to...
Forged steel
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
Not mix with mineral oils
Reversing

7. CSA B-52 applies to...
1. design - construction and installation of refrigerating systems 2. operation and inspection of refrigerating systems
Generator - condenser - receiver - expansion valve - evaporator - absorber - aqua pump.
Regulate the flow of refrigerant to the evaporator
The inlet valves

8. Refrigeration systems are purged
Blading - shaft - and seals
To rid the system of non - condensable gases
Cooling and aerating the steam in a steam condenser
The compressor and combustor

9. The main components of an lithium bromide absorption refrigeration system are...
Generator - condenser - receiver - expansion valve - evaporator - absorber - aqua pump.
Blading - shaft - and seals
Level
At least as large as the compressor intake

10. Before starting a small non - condensing turbine which of the following procedures would be performed?
1. sliding vane 2. rotary lobe 3. rotary screw
The inlet valves
1. Drain the condensate from steam line and turbine casing. 2. Check oil level in bearing sumps or reservoir.
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

11. Refrigeration may be defined as...
Reaction turbine
The liquid refrigerant absorbs heat and boils
B2
A controlled process of removing heat from a substance

12. The component that allows for the switching from heating to cooling mode on an air heat pump is called a/an __________ valve?
1. Drain the condensate from steam line and turbine casing. 2. Check oil level in bearing sumps or reservoir.
Reversing
Generator - condenser - receiver - expansion valve - evaporator - absorber - aqua pump.
1. Turbine casing drain coolers 2. gland steam condensers 3. air ejectors

13. Surging of dynamic air compressors can produce severe shock to the system and may be violent enough to damage the...
The liquid refrigerant absorbs heat and boils
1. design - construction and installation of refrigerating systems 2. operation and inspection of refrigerating systems
Reciprocating
Blading - shaft - and seals

14. During the start- up of some reaction steam turbines - the thrust block is pushed against a stop in the direction of the inlet for...
Maximum axial seal clearance
Reaction turbine
Prevent the shaft from moving axially with the thrust
Forged steel

15. Connecting rods are usually made of...
Forged steel
1. Drain the condensate from steam line and turbine casing. 2. Check oil level in bearing sumps or reservoir.
The fuel is injected into the cylinder by the injector
To remove heat from the condensing water

16. Air in a surface condenser
Blading - shaft - and seals
1. increases the pressure 2. retards heat transfer 3. is cooled before being removed
Reversing
Solenoid valves

17. The disadvantages of a gas turbine include
1. fuel costs are high 2. the operating noise level is high 3. low thermal efficiency
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
Prevent the shaft from moving axially with the thrust
Reaction turbine

18. Steam turbine stationary nozzles serve to...
Level
Low pressure turbine
1. little or no water requirements 2. low installation cost 3. high power to mass ratio
1. decrease steam pressure 2. increase steam

19. A gas turbine would be chosen where these characteristics are advantageous
1. fuel costs are high 2. the operating noise level is high 3. low thermal efficiency
1. high temperature application 2. where chemical contamination is possible 3. on electrical equipment
Level
1. little or no water requirements 2. low installation cost 3. high power to mass ratio

20. Ammonia refrigerant will
1. little or no water requirements 2. low installation cost 3. high power to mass ratio
It sprays jets of cooling water into the exhaust steam to condense it
Not mix with mineral oils
1. Drain the condensate from steam line and turbine casing. 2. Check oil level in bearing sumps or reservoir.

21. In the common rail system used for injection of fuel into the diesel engine cylinder
B2
Reciprocating
To remove heat from the condensing water
The fuel is injected into the cylinder by the injector

22. Of all the positive displacement air compressors - the ______ compressor can deliver the highest discharge pressure.
Cooling and aerating the steam in a steam condenser
Reciprocating
Regulate the flow of refrigerant to the evaporator
1. Drain the condensate from steam line and turbine casing. 2. Check oil level in bearing sumps or reservoir.

23. The evaporator is where
The liquid refrigerant absorbs heat and boils
1. design - construction and installation of refrigerating systems 2. operation and inspection of refrigerating systems
Calcium chloride
1. sliding vane 2. rotary lobe 3. rotary screw

24. In order to keep the gas pass of a gas turbine clean - the following must be done
The fuel is injected into the cylinder by the injector
Reciprocating
The compressor and combustor
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

25. NH3 (R-717) refrigerant
To remove heat from the condensing water
1. little or no water requirements 2. low installation cost 3. high power to mass ratio
Solenoid valves
Is corrosive to non - ferrous metals in the presence of water

26. 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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27. The main purpose of a cooling tower is to...
Not mix with mineral oils
Maximum axial seal clearance
To remove heat from the condensing water
1. Turbine casing drain coolers 2. gland steam condensers 3. air ejectors

28. The deaerator is usually operated to maintain constant
1. design - construction and installation of refrigerating systems 2. operation and inspection of refrigerating systems
Level
Is corrosive to non - ferrous metals in the presence of water
To remove heat from the condensing water

29. The inlet pipe to the compressor must be...
Is corrosive to non - ferrous metals in the presence of water
At least as large as the compressor intake
Solenoid valves
1. increases the pressure 2. retards heat transfer 3. is cooled before being removed

30. In the internal combustion engine - the purpose of the rocker arm is to operate
1. sliding vane 2. rotary lobe 3. rotary screw
1. little or no water requirements 2. low installation cost 3. high power to mass ratio
1. Turbine casing drain coolers 2. gland steam condensers 3. air ejectors
The inlet valves

31. The purpose of a thrust bearing is to...
It sprays jets of cooling water into the exhaust steam to condense it
Prevent the shaft from moving axially with the thrust
Generator - condenser - receiver - expansion valve - evaporator - absorber - aqua pump.
The fuel is injected into the cylinder by the injector

32. The purpose of the expansion valve is to...
To rid the system of non - condensable gases
Regulate the flow of refrigerant to the evaporator
1. Drain the condensate from steam line and turbine casing. 2. Check oil level in bearing sumps or reservoir.
It sprays jets of cooling water into the exhaust steam to condense it

33. Three different designs of rotary compressors are...
1. Turbine casing drain coolers 2. gland steam condensers 3. air ejectors
The inlet valves
Regulate the flow of refrigerant to the evaporator
1. sliding vane 2. rotary lobe 3. rotary screw

34. The free piston gas generator in a gas turbine cycle will take the place of...
The compressor and combustor
Reciprocating
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. Drain the condensate from steam line and turbine casing. 2. Check oil level in bearing sumps or reservoir.

35. A pressure drop created across the turbine blades by the expanding steam is the basic operating principle of the...
Reaction turbine
It sprays jets of cooling water into the exhaust steam to condense it
To rid the system of non - condensable gases
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

36. Condenser cooling water is usually controlled by...
Solenoid valves
1. imperfect injection 2. worn injectors 3. injection timed too early 4. improper grade of fuel
Cooling and aerating the steam in a steam condenser
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

37. Rough running of a diesel engine is caused by...
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
Blading - shaft - and seals
Prevent the shaft from moving axially with the thrust
1. imperfect injection 2. worn injectors 3. injection timed too early 4. improper grade of fuel

38. The jet condenser is so named because...
The liquid refrigerant absorbs heat and boils
1. Turbine casing drain coolers 2. gland steam condensers 3. air ejectors
It sprays jets of cooling water into the exhaust steam to condense it
1. Drain the condensate from steam line and turbine casing. 2. Check oil level in bearing sumps or reservoir.

39. The condenser extraction (condensate) pump normally supplies cooling Water to the...
Reaction turbine
1. Turbine casing drain coolers 2. gland steam condensers 3. air ejectors
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
To remove heat from the condensing water

40. In a dual shaft gas turbine the load is driven by a
Solenoid valves
Low pressure turbine
Blading - shaft - and seals
Calcium chloride