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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. 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. inspect and clean air intake filters 2. inspect and clean air intake ducts 3. water wash the compressor blades 4. use good quality fuel
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.

2. Three different designs of rotary compressors are...
1. imperfect injection 2. worn injectors 3. injection timed too early 4. improper grade of fuel
1. sliding vane 2. rotary lobe 3. rotary screw
The inlet valves
A controlled process of removing heat from a substance

3. The evaporator is where
1. fuel costs are high 2. the operating noise level is high 3. low thermal efficiency
Prevent the shaft from moving axially with the thrust
The liquid refrigerant absorbs heat and boils
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 refrigerant will
Not mix with mineral oils
The compressor and combustor
It sprays jets of cooling water into the exhaust steam to condense it
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.

5. During the start- up of some reaction steam turbines - the thrust block is pushed against a stop in the direction of the inlet for...
Is corrosive to non - ferrous metals in the presence of water
To remove heat from the condensing water
Forged steel
Maximum axial seal clearance

6. The deaerator is usually operated to maintain constant
1. Drain the condensate from steam line and turbine casing. 2. Check oil level in bearing sumps or reservoir.
Reciprocating
B2
Level

7. Condenser cooling water is usually controlled by...
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. 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
Solenoid valves

8. Brine used in ammonia indirect systems is usually made with
Solenoid valves
Level
Calcium chloride
The inlet valves

9. Of all the positive displacement air compressors - the ______ compressor can deliver the highest discharge pressure.
Not mix with mineral oils
Reciprocating
1. decrease steam pressure 2. increase steam
Calcium chloride

10. NH3 (R-717) refrigerant
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
The fuel is injected into the cylinder by the injector
Is corrosive to non - ferrous metals in the presence of water
It sprays jets of cooling water into the exhaust steam to condense it

11. The condenser extraction (condensate) pump normally supplies cooling Water to the...
1. Turbine casing drain coolers 2. gland steam condensers 3. air ejectors
B2
It sprays jets of cooling water into the exhaust steam to condense it
To remove heat from the condensing water

12. Connecting rods are usually made of...
The inlet 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.
Forged steel
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. A gas turbine would be chosen where these characteristics are advantageous
Prevent the shaft from moving axially with the thrust
1. little or no water requirements 2. low installation cost 3. high power to mass ratio
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. fuel costs are high 2. the operating noise level is high 3. low thermal efficiency

14. 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
1. design - construction and installation of refrigerating systems 2. operation and inspection of refrigerating systems
Prevent the shaft from moving axially with the thrust
Reversing

15. Ammonia (R-717) is classified in Safety Group
It sprays jets of cooling water into the exhaust steam to condense it
B2
Generator - condenser - receiver - expansion valve - evaporator - absorber - aqua pump.
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.

16. The free piston gas generator in a gas turbine cycle will take the place of...
The compressor and combustor
Level
Solenoid valves
Low pressure turbine

17. 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

18. CSA B-52 applies to...
1. sliding vane 2. rotary lobe 3. rotary screw
The inlet valves
Maximum axial seal clearance
1. design - construction and installation of refrigerating systems 2. operation and inspection of refrigerating systems

19. Barring or turning gears are used to...
1. high temperature application 2. where chemical contamination is possible 3. on electrical equipment
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
Reciprocating
Level

20. Refrigeration may be defined as...
It sprays jets of cooling water into the exhaust steam to condense it
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.
A controlled process of removing heat from a substance
To rid the system of non - condensable gases

21. In order to keep the gas pass of a gas turbine clean - the following must be done
Maximum axial seal clearance
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
1. imperfect injection 2. worn injectors 3. injection timed too early 4. improper grade of fuel

22. The purpose of the expansion valve is to...
1. design - construction and installation of refrigerating systems 2. operation and inspection of refrigerating systems
1. little or no water requirements 2. low installation cost 3. high power to mass ratio
Regulate the flow of refrigerant to the evaporator
Solenoid valves

23. A pressure drop created across the turbine blades by the expanding steam is the basic operating principle of the...
Cooling and aerating the steam in a steam condenser
Prevent the shaft from moving axially with the thrust
Reaction turbine
Calcium chloride

24. In the common rail system used for injection of fuel into the diesel engine cylinder
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.
Level
The fuel is injected into the cylinder by the injector

25. Steam turbine stationary nozzles serve to...
Reversing
Reaction turbine
1. decrease steam pressure 2. increase steam
Level

26. The purpose of a thrust bearing is to...
Regulate the flow of refrigerant to the evaporator
Blading - shaft - and seals
It sprays jets of cooling water into the exhaust steam to condense it
Prevent the shaft from moving axially with the thrust

27. Air in a surface condenser
Forged steel
1. Drain the condensate from steam line and turbine casing. 2. Check oil level in bearing sumps or reservoir.
Blading - shaft - and seals
1. increases the pressure 2. retards heat transfer 3. is cooled before being removed

28. The jet condenser is so named because...
1. sliding vane 2. rotary lobe 3. rotary screw
Reaction turbine
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

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

30. Refrigeration systems are purged
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
1. sliding vane 2. rotary lobe 3. rotary screw
1. imperfect injection 2. worn injectors 3. injection timed too early 4. improper grade of fuel

31. In the internal combustion engine - the purpose of the rocker arm is to operate
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.
B2
The inlet valves

32. In a dual shaft gas turbine the load is driven by a
Cooling and aerating the steam in a steam condenser
Low pressure turbine
1. imperfect injection 2. worn injectors 3. injection timed too early 4. improper grade of fuel
1. Drain the condensate from steam line and turbine casing. 2. Check oil level in bearing sumps or reservoir.

33. 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
1. Turbine casing drain coolers 2. gland steam condensers 3. air ejectors
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. design - construction and installation of refrigerating systems 2. operation and inspection of refrigerating systems

34. Before starting a small non - condensing turbine which of the following procedures would be performed?
Level
Low pressure turbine
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

35. Compressed air is not used for...
Cooling and aerating the steam in a steam condenser
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.
Regulate the flow of refrigerant to the evaporator
Solenoid valves

36. The main purpose of a cooling tower is to...
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
Calcium chloride
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
To remove heat from the condensing water

37. The disadvantages of a gas turbine include
Level
1. fuel costs are high 2. the operating noise level is high 3. low thermal efficiency
At least as large as the compressor intake
Reversing

38. The main components of an lithium bromide absorption refrigeration system 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
Generator - condenser - receiver - expansion valve - evaporator - absorber - aqua pump.
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

39. Solid lubricants are used for...
Generator - condenser - receiver - expansion valve - evaporator - absorber - aqua pump.
1. sliding vane 2. rotary lobe 3. rotary screw
Maximum axial seal clearance
1. high temperature application 2. where chemical contamination is possible 3. on electrical equipment

40. Surging of dynamic air compressors can produce severe shock to the system and may be violent enough to damage the...
Blading - shaft - and seals
1. little or no water requirements 2. low installation cost 3. high power to mass ratio
Prevent the shaft from moving axially with the thrust
1. design - construction and installation of refrigerating systems 2. operation and inspection of refrigerating systems