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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. 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
1. fuel costs are high 2. the operating noise level is high 3. low thermal efficiency
B2
Generator - condenser - receiver - expansion valve - evaporator - absorber - aqua pump.

2. 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.
Is corrosive to non - ferrous metals in the presence of water
1. increases the pressure 2. retards heat transfer 3. is cooled before being removed
Cooling and aerating the steam in a steam condenser

3. Solid lubricants are used for...
1. high temperature application 2. where chemical contamination is possible 3. on electrical equipment
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. sliding vane 2. rotary lobe 3. rotary screw
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. 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
Reversing
Low pressure turbine

5. Surging of dynamic air compressors can produce severe shock to the system and may be violent enough to damage the...
Reversing
Low pressure turbine
Cooling and aerating the steam in a steam condenser
Blading - shaft - and seals

6. The main purpose of a cooling tower is to...
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
Low pressure turbine
1. Turbine casing drain coolers 2. gland steam condensers 3. air ejectors

7. The purpose of the expansion valve is to...
Not mix with mineral oils
Regulate the flow of refrigerant to the evaporator
To rid the system of non - condensable gases
Reciprocating

8. The evaporator is where
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. little or no water requirements 2. low installation cost 3. high power to mass ratio
The liquid refrigerant absorbs heat and boils
Not mix with mineral oils

9. Ammonia refrigerant will
Generator - condenser - receiver - expansion valve - evaporator - absorber - aqua pump.
Not mix with mineral oils
Is corrosive to non - ferrous metals in the presence of water
Low pressure turbine

10. Brine used in ammonia indirect systems is usually made with
1. design - construction and installation of refrigerating systems 2. operation and inspection of refrigerating systems
Calcium chloride
B2
The inlet valves

11. The condenser extraction (condensate) pump normally supplies cooling Water to the...
1. Turbine casing drain coolers 2. gland steam condensers 3. air ejectors
Is corrosive to non - ferrous metals in the presence of water
To rid the system of non - condensable gases
1. little or no water requirements 2. low installation cost 3. high power to mass ratio

12. The main components of an lithium bromide absorption refrigeration system are...
1. high temperature application 2. where chemical contamination is possible 3. on electrical equipment
A controlled process of removing heat from a substance
B2
Generator - condenser - receiver - expansion valve - evaporator - absorber - aqua pump.

13. For a particular air sample - wet and dry bulb temperatures when plotted on a psychometric chart will help determine
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
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.

14. Refrigeration may be defined as...
Reaction 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
A controlled process of removing heat from a substance
1. sliding vane 2. rotary lobe 3. rotary screw

15. 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
B2
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

16. In the internal combustion engine - the purpose of the rocker arm is to operate
The inlet valves
1. design - construction and installation of refrigerating systems 2. operation and inspection of refrigerating systems
1. fuel costs are high 2. the operating noise level is high 3. low thermal efficiency
The fuel is injected into the cylinder by the injector

17. The jet condenser is so named because...
B2
It sprays jets of cooling water into the exhaust steam to condense it
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
Reaction turbine

18. The disadvantages of a gas turbine include
To rid the system of non - condensable gases
1. fuel costs are high 2. the operating noise level is high 3. low thermal efficiency
Not mix with mineral oils
Reciprocating

19. The inlet pipe to the compressor must be...
Reciprocating
At least as large as the compressor intake
1. design - construction and installation of refrigerating systems 2. operation and inspection of refrigerating systems
Not mix with mineral oils

20. The deaerator is usually operated to maintain constant
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
Solenoid valves
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

21. A gas turbine would be chosen where these characteristics are advantageous
It sprays jets of cooling water into the exhaust steam to condense it
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. little or no water requirements 2. low installation cost 3. high power to mass ratio
1. imperfect injection 2. worn injectors 3. injection timed too early 4. improper grade of fuel

22. CSA B-52 applies to...
1. design - construction and installation of refrigerating systems 2. operation and inspection of refrigerating systems
Reversing
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

23. During the start- up of some reaction steam turbines - the thrust block is pushed against a stop in the direction of the inlet for...
Solenoid valves
1. high temperature application 2. where chemical contamination is possible 3. on electrical equipment
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
Maximum axial seal clearance

24. Compressed air is not used for...
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. inspect and clean air intake filters 2. inspect and clean air intake ducts 3. water wash the compressor blades 4. use good quality fuel
Cooling and aerating the steam in a steam condenser
Prevent the shaft from moving axially with the thrust

25. Condenser cooling water is usually controlled by...
Regulate the flow of refrigerant to the evaporator
Solenoid valves
At least as large as the compressor intake
1. little or no water requirements 2. low installation cost 3. high power to mass ratio

26. In a dual shaft gas turbine the load is driven by a
Solenoid valves
Generator - condenser - receiver - expansion valve - evaporator - absorber - aqua pump.
Level
Low pressure turbine

27. NH3 (R-717) refrigerant
Is corrosive to non - ferrous metals in the presence of water
Low pressure turbine
At least as large as the compressor intake
1. decrease steam pressure 2. increase steam

28. Air in a surface condenser
1. sliding vane 2. rotary lobe 3. rotary screw
Regulate the flow of refrigerant to the evaporator
1. increases the pressure 2. retards heat transfer 3. is cooled before being removed
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

29. Barring or turning gears are used to...
Cooling and aerating the steam in a steam condenser
1. design - construction and installation of refrigerating systems 2. operation and inspection of refrigerating systems
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
Maximum axial seal clearance

30. Connecting rods are usually made of...
Forged steel
Blading - shaft - and seals
1. sliding vane 2. rotary lobe 3. rotary screw
1. design - construction and installation of refrigerating systems 2. operation and inspection of refrigerating systems

31. Refrigeration systems are purged
To rid the system of non - condensable gases
1. Drain the condensate from steam line and turbine casing. 2. Check oil level in bearing sumps or reservoir.
Blading - shaft - and seals
It sprays jets of cooling water into the exhaust steam to condense it

32. Of all the positive displacement air compressors - the ______ compressor can deliver the highest discharge pressure.
1. Drain the condensate from steam line and turbine casing. 2. Check oil level in bearing sumps or reservoir.
Reciprocating
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

33. 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

34. In order to keep the gas pass of a gas turbine clean - the following must be done
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. Turbine casing drain coolers 2. gland steam condensers 3. air ejectors
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

35. Steam turbine stationary nozzles serve to...
1. decrease steam pressure 2. increase steam
Reversing
Prevent the shaft from moving axially with the thrust
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. A pressure drop created across the turbine blades by the expanding steam is the basic operating principle of the...
A controlled process of removing heat from a substance
Reciprocating
Reaction turbine
1. imperfect injection 2. worn injectors 3. injection timed too early 4. improper grade of fuel

37. The purpose of a thrust bearing is to...
Level
The liquid refrigerant absorbs heat and boils
Prevent the shaft from moving axially with the thrust
Low pressure turbine

38. The component that allows for the switching from heating to cooling mode on an air heat pump is called a/an __________ valve?
Reaction turbine
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
Reversing

39. Ammonia (R-717) is classified in Safety Group
It sprays jets of cooling water into the exhaust steam to condense it
The compressor and combustor
The liquid refrigerant absorbs heat and boils
B2

40. Three different designs of rotary compressors are...
A controlled process of removing heat from a substance
1. sliding vane 2. rotary lobe 3. rotary screw
To remove heat from the condensing water
The compressor and combustor