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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. A pressure drop created across the turbine blades by the expanding steam is the basic operating principle of the...
Reaction turbine
To remove heat from the condensing water
Level
1. design - construction and installation of refrigerating systems 2. operation and inspection of refrigerating systems

2. The free piston gas generator in a gas turbine cycle will take the place of...
1. high temperature application 2. where chemical contamination is possible 3. on electrical equipment
Forged steel
The compressor and combustor
Maximum axial seal clearance

3. In the internal combustion engine - the purpose of the rocker arm is to operate
Low pressure turbine
To remove heat from the condensing water
1. fuel costs are high 2. the operating noise level is high 3. low thermal efficiency
The inlet valves

4. The purpose of a thrust bearing is to...
1. high temperature application 2. where chemical contamination is possible 3. on electrical equipment
B2
Prevent the shaft from moving axially with the thrust
Cooling and aerating the steam in a steam condenser

5. The purpose of the expansion valve is to...
1. decrease steam pressure 2. increase steam
Regulate the flow of refrigerant to the evaporator
Reversing
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

6. For a particular air sample - wet and dry bulb temperatures when plotted on a psychometric chart will help determine
The compressor and combustor
Low pressure turbine
To remove heat from the condensing 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.

7. Refrigeration may be defined as...
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.
Is corrosive to non - ferrous metals in the presence of water
A controlled process of removing heat from a substance
1. fuel costs are high 2. the operating noise level is high 3. low thermal efficiency

8. CSA B-52 applies to...
1. design - construction and installation of refrigerating systems 2. operation and inspection of refrigerating systems
1. Turbine casing drain coolers 2. gland steam condensers 3. air ejectors
At least as large as the compressor intake
Low pressure turbine

9. In order to keep the gas pass of a gas turbine clean - the following must be done
1. decrease steam pressure 2. increase steam
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
1. increases the pressure 2. retards heat transfer 3. is cooled before being removed

10. Solid lubricants are used for...
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
1. high temperature application 2. where chemical contamination is possible 3. on electrical equipment
Regulate the flow of refrigerant to the evaporator

11. Compressed air is not used for...
Calcium chloride
1. Turbine casing drain coolers 2. gland steam condensers 3. air ejectors
A controlled process of removing heat from a substance
Cooling and aerating the steam in a steam condenser

12. 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

13. The component that allows for the switching from heating to cooling mode on an air heat pump is called a/an __________ valve?
Cooling and aerating the steam in a steam condenser
Reversing
To remove heat from the condensing water
Blading - shaft - and seals

14. 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
1. Turbine casing drain coolers 2. gland steam condensers 3. air ejectors
To remove heat from the condensing water
A controlled process of removing heat from a substance

15. Ammonia refrigerant will
1. Drain the condensate from steam line and turbine casing. 2. Check oil level in bearing sumps or reservoir.
Not mix with mineral oils
Blading - shaft - and seals
The inlet valves

16. Rough running of a diesel engine is caused by...
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
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

17. In the common rail system used for injection of fuel into the diesel engine cylinder
Forged steel
The fuel is injected into the cylinder by the injector
Not mix with mineral oils
It sprays jets of cooling water into the exhaust steam to condense it

18. Barring or turning gears are used to...
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
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

19. Of all the positive displacement air compressors - the ______ compressor can deliver the highest discharge pressure.
Reciprocating
To rid the system of non - condensable gases
Low pressure turbine
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

20. Three different designs of rotary compressors are...
Reversing
1. increases the pressure 2. retards heat transfer 3. is cooled before being removed
1. sliding vane 2. rotary lobe 3. rotary screw
The compressor and combustor

21. NH3 (R-717) refrigerant
1. little or no water requirements 2. low installation cost 3. high power to mass ratio
Is corrosive to non - ferrous metals in the presence of water
Reciprocating
1. imperfect injection 2. worn injectors 3. injection timed too early 4. improper grade of fuel

22. The inlet pipe to the compressor must be...
Not mix with mineral oils
The compressor and combustor
Reversing
At least as large as the compressor intake

23. A gas turbine would be chosen where these characteristics are advantageous
1. little or no water requirements 2. low installation cost 3. high power to mass ratio
Reversing
Not mix with mineral oils
Low pressure turbine

24. Brine used in ammonia indirect systems is usually made with
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.
Level
The compressor and combustor
Calcium chloride

25. Ammonia (R-717) is classified in Safety Group
The liquid refrigerant absorbs heat and boils
B2
Blading - shaft - and seals
Level

26. During the start- up of some reaction steam turbines - the thrust block is pushed against a stop in the direction of the inlet for...
1. fuel costs are high 2. the operating noise level is high 3. low thermal efficiency
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. Steam turbine stationary nozzles serve to...
Regulate the flow of refrigerant to the evaporator
1. decrease steam pressure 2. increase steam
It sprays jets of cooling water into the exhaust steam to condense it
Cooling and aerating the steam in a steam condenser

28. Refrigeration systems are purged
The liquid refrigerant absorbs heat and boils
1. fuel costs are high 2. the operating noise level is high 3. low thermal efficiency
To rid the system of non - condensable gases
Blading - shaft - and seals

29. The evaporator is where
The liquid refrigerant absorbs heat and boils
The fuel is injected into the cylinder by the injector
1. imperfect injection 2. worn injectors 3. injection timed too early 4. improper grade of fuel
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. The main components of an lithium bromide absorption refrigeration system are...
Reciprocating
Maximum axial seal clearance
Generator - condenser - receiver - expansion valve - evaporator - absorber - aqua pump.
A controlled process of removing heat from a substance

31. Connecting rods are usually made of...
Forged steel
Cooling and aerating the steam in a steam condenser
To remove heat from the condensing water
Prevent the shaft from moving axially with the thrust

32. Air in a surface condenser
The inlet valves
Cooling and aerating the steam in a steam condenser
1. increases the pressure 2. retards heat transfer 3. is cooled before being removed
The liquid refrigerant absorbs heat and boils

33. Before starting a small non - condensing turbine which of the following procedures would be performed?
At least as large as the compressor intake
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.
To remove heat from the condensing water

34. Surging of dynamic air compressors can produce severe shock to the system and may be violent enough to damage 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
Blading - shaft - and seals
Generator - condenser - receiver - expansion valve - evaporator - absorber - aqua pump.
1. little or no water requirements 2. low installation cost 3. high power to mass ratio

35. In a dual shaft gas turbine the load is driven by a
A controlled process of removing heat from a substance
1. Drain the condensate from steam line and turbine casing. 2. Check oil level in bearing sumps or reservoir.
Low pressure turbine
Regulate the flow of refrigerant to the evaporator

36. The deaerator is usually operated to maintain constant
Level
Maximum axial seal clearance
1. Turbine casing drain coolers 2. gland steam condensers 3. air ejectors
1. design - construction and installation of refrigerating systems 2. operation and inspection of refrigerating systems

37. The disadvantages of a gas turbine include
1. Drain the condensate from steam line and turbine casing. 2. Check oil level in bearing sumps or reservoir.
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
Prevent the shaft from moving axially with the thrust

38. The condenser extraction (condensate) pump normally supplies cooling Water to the...
The fuel is injected into the cylinder by the injector
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. 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

39. The jet condenser is so named because...
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
It sprays jets of cooling water into the exhaust steam to condense it
Low pressure turbine
1. little or no water requirements 2. low installation cost 3. high power to mass ratio

40. Condenser cooling water is usually controlled by...
A controlled process of removing heat from a substance
1. design - construction and installation of refrigerating systems 2. operation and inspection of refrigerating systems
Solenoid valves
B2