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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. Brine used in ammonia indirect systems is usually made with
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
Blading - shaft - and seals
Low pressure turbine

2. In order to keep the gas pass of a gas turbine clean - the following must be done
Cooling and aerating the steam in a steam condenser
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
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.

3. Of all the positive displacement air compressors - the ______ compressor can deliver the highest discharge pressure.
Reciprocating
1. decrease steam pressure 2. increase steam
Solenoid valves
1. fuel costs are high 2. the operating noise level is high 3. low thermal efficiency

4. The jet condenser is so named because...
Reaction turbine
1. fuel costs are high 2. the operating noise level is high 3. low thermal efficiency
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

5. 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
Calcium chloride
1. increases the pressure 2. retards heat transfer 3. is cooled before being removed

6. The purpose of the expansion valve is to...
The liquid refrigerant absorbs heat and boils
The compressor and combustor
Regulate the flow of refrigerant to the evaporator
1. Turbine casing drain coolers 2. gland steam condensers 3. air ejectors

7. Refrigeration may be defined as...
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
A controlled process of removing heat from a substance
Forged steel

8. Steam turbine stationary nozzles serve to...
Blading - shaft - and seals
1. decrease steam pressure 2. increase steam
A controlled process of removing heat from a substance
Reaction turbine

9. Solid lubricants are used for...
1. high temperature application 2. where chemical contamination is possible 3. on electrical equipment
Calcium chloride
The inlet 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

10. 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.
Regulate the flow of refrigerant to the evaporator
Solenoid valves
Blading - shaft - and seals

11. A pressure drop created across the turbine blades by the expanding steam is the basic operating principle of the...
1. design - construction and installation of refrigerating systems 2. operation and inspection of refrigerating systems
Blading - shaft - and seals
Reaction turbine
Generator - condenser - receiver - expansion valve - evaporator - absorber - aqua pump.

12. The evaporator is where
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 liquid refrigerant absorbs heat and boils
Not mix with mineral oils
Level

13. In a dual shaft gas turbine the load is driven by a
Regulate the flow of refrigerant to the evaporator
Is corrosive to non - ferrous metals in the presence of water
Low pressure turbine
B2

14. Before starting a small non - condensing turbine which of the following procedures would be performed?
Reciprocating
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
Cooling and aerating the steam in a steam condenser

15. 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

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

17. The purpose of a thrust bearing is to...
To rid the system of non - condensable gases
1. decrease steam pressure 2. increase steam
1. high temperature application 2. where chemical contamination is possible 3. on electrical equipment
Prevent the shaft from moving axially with the thrust

18. Three different designs of rotary compressors are...
Is corrosive to non - ferrous metals in the presence of water
1. sliding vane 2. rotary lobe 3. rotary screw
A controlled process of removing heat from a substance
At least as large as the compressor intake

19. The main purpose of a cooling tower is to...
Cooling and aerating the steam in a steam condenser
To remove heat from the condensing water
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
B2

20. The inlet pipe to the compressor must be...
Prevent the shaft from moving axially with the thrust
1. decrease steam pressure 2. increase steam
At least as large as the compressor intake
B2

21. For a particular air sample - wet and dry bulb temperatures when plotted on a psychometric chart will help determine
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.
The fuel is injected into the cylinder by the injector
Reciprocating

22. The main components of an lithium bromide absorption refrigeration system are...
Maximum axial seal clearance
Regulate the flow of refrigerant to the evaporator
Generator - condenser - receiver - expansion valve - evaporator - absorber - aqua pump.
1. sliding vane 2. rotary lobe 3. rotary screw

23. A gas turbine would be chosen where these characteristics are advantageous
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
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. increases the pressure 2. retards heat transfer 3. is cooled before being removed

24. The deaerator is usually operated to maintain constant
A controlled process of removing heat from a substance
1. decrease steam pressure 2. increase steam
Level
1. increases the pressure 2. retards heat transfer 3. is cooled before being removed

25. Refrigeration systems are purged
1. imperfect injection 2. worn injectors 3. injection timed too early 4. improper grade of fuel
Reciprocating
To rid the system of non - condensable gases
Cooling and aerating the steam in a steam condenser

26. The component that allows for the switching from heating to cooling mode on an air heat pump is called a/an __________ valve?
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.
Calcium chloride
1. imperfect injection 2. worn injectors 3. injection timed too early 4. improper grade of fuel
Reversing

27. Compressed air is not used for...
Is corrosive to non - ferrous metals in the presence of water
Cooling and aerating the steam in a steam condenser
Reciprocating
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

28. Ammonia (R-717) is classified in Safety Group
1. Drain the condensate from steam line and turbine casing. 2. Check oil level in bearing sumps or reservoir.
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. 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

29. 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
Reciprocating
Generator - condenser - receiver - expansion valve - evaporator - absorber - aqua pump.
Blading - shaft - and seals

30. CSA B-52 applies 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
1. design - construction and installation of refrigerating systems 2. operation and inspection of refrigerating systems
Blading - shaft - and seals
At least as large as the compressor intake

31. Ammonia refrigerant will
Level
Not mix with mineral oils
1. sliding vane 2. rotary lobe 3. rotary screw
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

32. Connecting rods are usually made of...
The compressor and combustor
The liquid refrigerant absorbs heat and boils
Forged steel
Is corrosive to non - ferrous metals in the presence of water

33. 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
Reciprocating
Maximum axial seal clearance
To rid the system of non - condensable gases

34. Air in a surface condenser
1. Drain the condensate from steam line and turbine casing. 2. Check oil level in bearing sumps or reservoir.
1. increases the pressure 2. retards heat transfer 3. is cooled before being removed
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
The inlet valves

35. Surging of dynamic air compressors can produce severe shock to the system and may be violent enough to damage the...
Blading - shaft - and seals
To remove heat from the condensing water
To rid the system of non - condensable gases
At least as large as the compressor intake

36. The free piston gas generator in a gas turbine cycle will take the place of...
B2
The compressor and combustor
Regulate the flow of refrigerant to the evaporator
It sprays jets of cooling water into the exhaust steam to condense it

37. Barring or turning gears are used to...
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
Is corrosive to non - ferrous metals in the presence of water
Prevent the shaft from moving axially with the thrust
1. design - construction and installation of refrigerating systems 2. operation and inspection of refrigerating systems

38. NH3 (R-717) refrigerant
1. high temperature application 2. where chemical contamination is possible 3. on electrical equipment
1. Drain the condensate from steam line and turbine casing. 2. Check oil level in bearing sumps or reservoir.
Maximum axial seal clearance
Is corrosive to non - ferrous metals in the presence of water

39. In the common rail system used for injection of fuel into the diesel engine cylinder
Is corrosive to non - ferrous metals in the presence of water
1. decrease steam pressure 2. increase steam
The inlet valves
The fuel is injected into the cylinder by the injector

40. In the internal combustion engine - the purpose of the rocker arm is to operate
The inlet valves
At least as large as the compressor intake
Generator - condenser - receiver - expansion valve - evaporator - absorber - aqua pump.
To rid the system of non - condensable gases