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Power Engineering 5

Instructions:

Answer 40 questions in 15 minutes.
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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 disadvantages of a gas turbine include
The fuel is injected into the cylinder by the injector
1. fuel costs are high 2. the operating noise level is high 3. low thermal efficiency
Blading - shaft - and seals
Reciprocating

2. Steam turbine stationary nozzles serve to...
1. decrease steam pressure 2. increase steam
Regulate the flow of refrigerant to the evaporator
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.
Prevent the shaft from moving axially with the thrust

3. The deaerator is usually operated to maintain constant
The compressor and combustor
1. imperfect injection 2. worn injectors 3. injection timed too early 4. improper grade of fuel
Level
Reversing

4. Brine used in ammonia indirect systems is usually made with
The fuel is injected into the cylinder by the injector
Maximum axial seal clearance
1. fuel costs are high 2. the operating noise level is high 3. low thermal efficiency
Calcium chloride

5. Surging of dynamic air compressors can produce severe shock to the system and may be violent enough to damage the...
Level
The fuel is injected into the cylinder by the injector
Not mix with mineral oils
Blading - shaft - and seals

6. In a dual shaft gas turbine the load is driven by a
Maximum axial seal clearance
Cooling and aerating the steam in a steam condenser
Low pressure turbine
B2

7. The main components of an lithium bromide absorption refrigeration system are...
1. little or no water requirements 2. low installation cost 3. high power to mass ratio
Reciprocating
Generator - condenser - receiver - expansion valve - evaporator - absorber - aqua pump.
The inlet valves

8. Air in a surface condenser
Prevent the shaft from moving axially with the thrust
1. increases the pressure 2. retards heat transfer 3. is cooled before being removed
At least as large as the compressor intake
The compressor and combustor

9. The purpose of the expansion valve is to...
Regulate the flow of refrigerant to the evaporator
Level
Maximum axial seal clearance
Generator - condenser - receiver - expansion valve - evaporator - absorber - aqua pump.

10. The inlet pipe to the compressor must be...
Solenoid valves
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
At least as large as the compressor intake
1. fuel costs are high 2. the operating noise level is high 3. low thermal efficiency

11. Refrigeration systems are purged
The fuel is injected into the cylinder by the injector
Blading - shaft - and seals
To rid the system of non - condensable gases
1. sliding vane 2. rotary lobe 3. rotary screw

12. In order to keep the gas pass of a gas turbine clean - the following must be done
Reciprocating
It sprays jets of cooling water into the exhaust steam to condense it
Calcium chloride
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

13. The evaporator is where
Generator - condenser - receiver - expansion valve - evaporator - absorber - aqua pump.
It sprays jets of cooling water into the exhaust steam to condense it
Is corrosive to non - ferrous metals in the presence of water
The liquid refrigerant absorbs heat and boils

14. Ammonia refrigerant will
Not mix with mineral oils
To rid the system of non - condensable gases
Low pressure turbine
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

15. During the start- up of some reaction steam turbines - the thrust block is pushed against a stop in the direction of the inlet for...
The compressor and combustor
Reaction turbine
The liquid refrigerant absorbs heat and boils
Maximum axial seal clearance

16. The condenser extraction (condensate) pump normally supplies cooling Water to the...
1. Drain the condensate from steam line and turbine casing. 2. Check oil level in bearing sumps or reservoir.
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
1. increases the pressure 2. retards heat transfer 3. is cooled before being removed

17. Solid lubricants are used for...
Forged steel
1. design - construction and installation of refrigerating systems 2. operation and inspection of refrigerating systems
To remove heat from the condensing water
1. high temperature application 2. where chemical contamination is possible 3. on electrical equipment

18. The jet condenser is so named because...
1. high temperature application 2. where chemical contamination is possible 3. on electrical equipment
It sprays jets of cooling water into the exhaust steam to condense it
To remove heat from the condensing water
1. Drain the condensate from steam line and turbine casing. 2. Check oil level in bearing sumps or reservoir.

19. Connecting rods are usually made of...
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
Forged steel
1. Drain the condensate from steam line and turbine casing. 2. Check oil level in bearing sumps or reservoir.
Is corrosive to non - ferrous metals in the presence of water

20. Three different designs of rotary compressors are...
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
Cooling and aerating the steam in a steam condenser
A controlled process of removing heat from a substance
1. sliding vane 2. rotary lobe 3. rotary screw

21. The free piston gas generator in a gas turbine cycle will take the place of...
The compressor and combustor
The inlet valves
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.

22. Compressed air is not used for...
Cooling and aerating the steam in a steam condenser
Regulate the flow of refrigerant to the evaporator
To rid the system of non - condensable gases
1. design - construction and installation of refrigerating systems 2. operation and inspection of refrigerating systems

23. Condenser cooling water is usually controlled by...
Solenoid valves
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
Is corrosive to non - ferrous metals in the presence of water

24. CSA B-52 applies to...
Reciprocating
1. design - construction and installation of refrigerating systems 2. operation and inspection of refrigerating systems
Is corrosive to non - ferrous metals in the presence of water
1. high temperature application 2. where chemical contamination is possible 3. on electrical equipment

25. Barring or turning gears are used to...
Not mix with mineral oils
A controlled process of removing heat from a substance
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
Regulate the flow of refrigerant to the evaporator

26. Before starting a small non - condensing turbine which of the following procedures would be performed?
1. Drain the condensate from steam line and turbine casing. 2. Check oil level in bearing sumps or reservoir.
Maximum axial seal clearance
The fuel is injected into the cylinder by the injector
1. design - construction and installation of refrigerating systems 2. operation and inspection of refrigerating systems

27. A pressure drop created across the turbine blades by the expanding steam is the basic operating principle of the...
1. imperfect injection 2. worn injectors 3. injection timed too early 4. improper grade of fuel
It sprays jets of cooling water into the exhaust steam to condense it
Reaction turbine
Maximum axial seal clearance

28. The main purpose of a cooling tower is to...
1. fuel costs are high 2. the operating noise level is high 3. low thermal efficiency
A controlled process of removing heat from a substance
Prevent the shaft from moving axially with the thrust
To remove heat from the condensing water

29. In the common rail system used for injection of fuel into the diesel engine cylinder
Not mix with mineral oils
Maximum axial seal clearance
The fuel is injected into the cylinder by the injector
Blading - shaft - and seals

30. Of all the positive displacement air compressors - the ______ compressor can deliver the highest discharge pressure.
1. increases the pressure 2. retards heat transfer 3. is cooled before being removed
Is corrosive to non - ferrous metals in the presence of water
Reciprocating
Forged steel

31. In the internal combustion engine - the purpose of the rocker arm is to operate
The fuel is injected into the cylinder by the injector
B2
The inlet valves
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

32. Refrigeration may be defined as...
A controlled process of removing heat from a substance
It sprays jets of cooling water into the exhaust steam to condense it
Regulate the flow of refrigerant to the evaporator
To remove heat from the condensing water

33. Ammonia (R-717) is classified in Safety Group
The fuel is injected into the cylinder by the injector
B2
1. increases the pressure 2. retards heat transfer 3. is cooled before being removed
Reaction turbine

34. The purpose of a thrust bearing is to...
Prevent the shaft from moving axially with the thrust
Reaction turbine
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

35. 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

36. For a particular air sample - wet and dry bulb temperatures when plotted on a psychometric chart will help determine
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
Blading - shaft - and seals
Prevent the shaft from moving axially with the thrust
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.

37. A gas turbine would be chosen where these characteristics are advantageous
The inlet valves
To rid the system of non - condensable gases
The liquid refrigerant absorbs heat and boils
1. little or no water requirements 2. low installation cost 3. high power to mass ratio

38. Rough running of a diesel engine is caused by...
Not mix with mineral oils
Prevent the shaft from moving axially with the thrust
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. imperfect injection 2. worn injectors 3. injection timed too early 4. improper grade of fuel

39. The component that allows for the switching from heating to cooling mode on an air heat pump is called a/an __________ valve?
1. design - construction and installation of refrigerating systems 2. operation and inspection of refrigerating systems
The inlet valves
Reversing
A controlled process of removing heat from a substance

40. NH3 (R-717) refrigerant
Reciprocating
Is corrosive to non - ferrous metals in the presence of water
Not mix with mineral oils
The liquid refrigerant absorbs heat and boils

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Power Engineering 5

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After Effects Keyboard Shortcuts

Agile Development

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