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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. Steam turbine stationary nozzles serve to...
At least as large as the compressor intake
Forged steel
1. decrease steam pressure 2. increase steam
To rid the system of non - condensable gases

2. A pressure drop created across the turbine blades by the expanding steam is the basic operating principle of the...
B2
Prevent the shaft from moving axially with the thrust
Low pressure turbine
Reaction turbine

3. The free piston gas generator in a gas turbine cycle will take the place of...
The compressor and combustor
The fuel is injected into the cylinder by the injector
B2
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

4. For a particular air sample - wet and dry bulb temperatures when plotted on a psychometric chart will help determine
A controlled process of removing heat from a substance
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.
Not mix with mineral oils
To remove heat from the condensing water

5. Refrigeration may be defined as...
A controlled process of removing heat from a substance
1. imperfect injection 2. worn injectors 3. injection timed too early 4. improper grade of fuel
Regulate the flow of refrigerant to the evaporator
1. increases the pressure 2. retards heat transfer 3. is cooled before being removed

6. The main purpose of a cooling tower is to...
Solenoid valves
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.
To remove heat from the condensing water
1. imperfect injection 2. worn injectors 3. injection timed too early 4. improper grade of fuel

7. In the internal combustion engine - the purpose of the rocker arm is to operate
A controlled process of removing heat from a substance
Cooling and aerating the steam in a steam condenser
The compressor and combustor
The inlet valves

8. The inlet pipe to the compressor must be...
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
At least as large as the compressor intake
1. imperfect injection 2. worn injectors 3. injection timed too early 4. improper grade of fuel
To rid the system of non - condensable gases

9. Rough running of a diesel engine is caused by...
Cooling and aerating the steam in a steam condenser
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
1. design - construction and installation of refrigerating systems 2. operation and inspection of refrigerating systems

10. The condenser extraction (condensate) pump normally supplies cooling Water to the...
Is corrosive to non - ferrous metals in the presence of water
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
1. sliding vane 2. rotary lobe 3. rotary screw

11. In order to keep the gas pass of a gas turbine clean - the following must be done
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
Low pressure turbine
Generator - condenser - receiver - expansion valve - evaporator - absorber - aqua pump.
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

12. 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. 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
Not mix with mineral oils
Maximum axial seal clearance
Reciprocating

13. In the common rail system used for injection of fuel into the diesel engine cylinder
Reaction turbine
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
1. imperfect injection 2. worn injectors 3. injection timed too early 4. improper grade of fuel

14. 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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15. Solid lubricants are used for...
1. high temperature application 2. where chemical contamination is possible 3. on electrical equipment
The inlet valves
Reaction turbine
The compressor and combustor

16. Compressed air is not used for...
Blading - shaft - and seals
Not mix with mineral oils
Cooling and aerating the steam in a steam condenser
Regulate the flow of refrigerant to the evaporator

17. Barring or turning gears are used to...
B2
Not mix with mineral oils
Is corrosive to non - ferrous metals in the presence of water
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

18. Three different designs of rotary compressors are...
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
Reciprocating
1. sliding vane 2. rotary lobe 3. rotary screw

19. Refrigeration systems are purged
The fuel is injected into the cylinder by the injector
Prevent the shaft from moving axially with the thrust
1. Drain the condensate from steam line and turbine casing. 2. Check oil level in bearing sumps or reservoir.
To rid the system of non - condensable gases

20. The component that allows for the switching from heating to cooling mode on an air heat pump is called a/an __________ valve?
Regulate the flow of refrigerant to the evaporator
At least as large as the compressor intake
Reversing
The compressor and combustor

21. The purpose of the expansion valve is to...
1. fuel costs are high 2. the operating noise level is high 3. low thermal efficiency
Regulate the flow of refrigerant to the evaporator
Not mix with mineral oils
1. high temperature application 2. where chemical contamination is possible 3. on electrical equipment

22. Before starting a small non - condensing turbine which of the following procedures would be performed?
At least as large as the compressor intake
1. Drain the condensate from steam line and turbine casing. 2. Check oil level in bearing sumps or reservoir.
Not mix with mineral oils
1. high temperature application 2. where chemical contamination is possible 3. on electrical equipment

23. In a dual shaft gas turbine the load is driven by a
1. Drain the condensate from steam line and turbine casing. 2. Check oil level in bearing sumps or reservoir.
B2
Maximum axial seal clearance
Low pressure turbine

24. Condenser cooling water is usually controlled by...
Forged steel
Blading - shaft - and seals
1. imperfect injection 2. worn injectors 3. injection timed too early 4. improper grade of fuel
Solenoid valves

25. The jet condenser is so named because...
Solenoid valves
It sprays jets of cooling water into the exhaust steam to condense it
Regulate the flow of refrigerant to the evaporator
At least as large as the compressor intake

26. Air in a surface condenser
Reversing
Prevent the shaft from moving axially with the thrust
1. decrease steam pressure 2. increase steam
1. increases the pressure 2. retards heat transfer 3. is cooled before being removed

27. The evaporator is where
Reciprocating
1. fuel costs are high 2. the operating noise level is high 3. low thermal efficiency
Calcium chloride
The liquid refrigerant absorbs heat and boils

28. NH3 (R-717) refrigerant
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
A controlled process of removing heat from a substance
Is corrosive to non - ferrous metals in the presence of water
Regulate the flow of refrigerant to the evaporator

29. Connecting rods are usually made of...
Maximum axial seal clearance
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
B2

30. 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
The inlet valves
At least as large as the compressor intake
Maximum axial seal clearance

31. Ammonia (R-717) is classified in Safety Group
The compressor and combustor
It sprays jets of cooling water into the exhaust steam to condense it
B2
Blading - shaft - and seals

32. CSA B-52 applies to...
To remove heat from the condensing water
Generator - condenser - receiver - expansion valve - evaporator - absorber - aqua pump.
It sprays jets of cooling water into the exhaust steam to condense it
1. design - construction and installation of refrigerating systems 2. operation and inspection of refrigerating systems

33. The disadvantages of a gas turbine include
1. fuel costs are high 2. the operating noise level is high 3. low thermal efficiency
The compressor and combustor
1. imperfect injection 2. worn injectors 3. injection timed too early 4. improper grade of fuel
Forged steel

34. Brine used in ammonia indirect systems is usually made with
Not mix with mineral oils
Is corrosive to non - ferrous metals in the presence of water
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

35. 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
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
Reversing

36. The deaerator is usually operated to maintain constant
Is corrosive to non - ferrous metals in the presence of water
A controlled process of removing heat from a substance
Level
Solenoid valves

37. The purpose of a thrust bearing is to...
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
Prevent the shaft from moving axially with the thrust
Low pressure turbine

38. Ammonia refrigerant will
Reciprocating
Not mix with mineral oils
Blading - shaft - and seals
The compressor and combustor

39. Of all the positive displacement air compressors - the ______ compressor can deliver the highest discharge pressure.
Reciprocating
B2
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.

40. The main components of an lithium bromide absorption refrigeration system are...
Generator - condenser - receiver - expansion valve - evaporator - absorber - aqua pump.
1. imperfect injection 2. worn injectors 3. injection timed too early 4. improper grade of fuel
1. increases the pressure 2. retards heat transfer 3. is cooled before being removed
Reciprocating