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

2. In the internal combustion engine - the purpose of the rocker arm is to operate
The inlet valves
To rid the system of non - condensable gases
Solenoid valves
1. sliding vane 2. rotary lobe 3. rotary screw

3. In order to keep the gas pass of a gas turbine clean - the following must be done
The fuel is injected into the cylinder by the injector
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. decrease steam pressure 2. increase steam

4. Compressed air is not used for...
Reversing
Cooling and aerating the steam in a steam condenser
The inlet valves
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 main components of an lithium bromide absorption refrigeration system are...
Regulate the flow of refrigerant to the evaporator
The compressor and combustor
To remove heat from the condensing water
Generator - condenser - receiver - expansion valve - evaporator - absorber - aqua pump.

6. The jet condenser is so named because...
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
Is corrosive to non - ferrous metals in the presence of water
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

7. 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
The inlet valves
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

8. Refrigeration systems are purged
Forged steel
1. little or no water requirements 2. low installation cost 3. high power to mass ratio
To rid the system of non - condensable gases
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

9. The component that allows for the switching from heating to cooling mode on an air heat pump is called a/an __________ valve?
The liquid refrigerant absorbs heat and boils
Reversing
1. high temperature application 2. where chemical contamination is possible 3. on electrical equipment
The fuel is injected into the cylinder by the injector

10. CSA B-52 applies to...
1. high temperature application 2. where chemical contamination is possible 3. on electrical equipment
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
Level

11. Solid lubricants are used for...
Low pressure turbine
1. high temperature application 2. where chemical contamination is possible 3. on electrical equipment
1. design - construction and installation of refrigerating systems 2. operation and inspection of refrigerating systems
It sprays jets of cooling water into the exhaust steam to condense it

12. The disadvantages of a gas turbine include
1. Turbine casing drain coolers 2. gland steam condensers 3. air ejectors
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
Solenoid valves
1. fuel costs are high 2. the operating noise level is high 3. low thermal efficiency

13. Steam turbine stationary nozzles serve to...
Prevent the shaft from moving axially with the thrust
Regulate the flow of refrigerant to the evaporator
A controlled process of removing heat from a substance
1. decrease steam pressure 2. increase steam

14. 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
Solenoid valves
It sprays jets of cooling water into the exhaust steam to condense it
Maximum axial seal clearance

15. NH3 (R-717) refrigerant
To remove heat from the condensing water
To rid the system of non - condensable gases
Is corrosive to non - ferrous metals in the presence of water
Regulate the flow of refrigerant to the evaporator

16. During the start- up of some reaction steam turbines - the thrust block is pushed against a stop in the direction of the inlet for...
It sprays jets of cooling water into the exhaust steam to condense it
The compressor and combustor
Maximum axial seal clearance
Solenoid valves

17. Rough running of a diesel engine is caused by...
At least as large as the compressor intake
Maximum axial seal clearance
To remove heat from the condensing water
1. imperfect injection 2. worn injectors 3. injection timed too early 4. improper grade of fuel

18. The purpose of the expansion valve is to...
Forged steel
Solenoid valves
Regulate the flow of refrigerant to the evaporator
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. Refrigeration may be defined as...
A controlled process of removing heat from a substance
Calcium chloride
Reversing
1. high temperature application 2. where chemical contamination is possible 3. on electrical equipment

20. Ammonia (R-717) is classified in Safety Group
1. fuel costs are high 2. the operating noise level is high 3. low thermal efficiency
B2
1. sliding vane 2. rotary lobe 3. rotary screw
Regulate the flow of refrigerant to the evaporator

21. The main purpose of a cooling tower is to...
Prevent the shaft from moving axially with the thrust
To remove heat from the condensing water
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

22. A pressure drop created across the turbine blades by the expanding steam is the basic operating principle of the...
At least as large as the compressor intake
A controlled process of removing heat from a substance
Blading - shaft - and seals
Reaction turbine

23. For a particular air sample - wet and dry bulb temperatures when plotted on a psychometric chart will help determine
1. Turbine casing drain coolers 2. gland steam condensers 3. air ejectors
Reversing
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.

24. The deaerator is usually operated to maintain constant
B2
Level
Solenoid valves
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

25. Condenser cooling water is usually controlled by...
Low pressure turbine
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.
Is corrosive to non - ferrous metals in the presence of water

26. Three different designs of rotary compressors are...
1. little or no water requirements 2. low installation cost 3. high power to mass ratio
A controlled process of removing heat from a substance
1. sliding vane 2. rotary lobe 3. rotary screw
Level

27. 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
Solenoid valves
Blading - shaft - and seals

28. The inlet pipe to the compressor must be...
Regulate the flow of refrigerant to the evaporator
The inlet valves
At least as large as the compressor intake
1. increases the pressure 2. retards heat transfer 3. is cooled before being removed

29. Air in a surface condenser
1. increases the pressure 2. retards heat transfer 3. is cooled before being removed
To rid the system of non - condensable gases
1. little or no water requirements 2. low installation cost 3. high power to mass ratio
B2

30. Surging of dynamic air compressors can produce severe shock to the system and may be violent enough to damage the...
The compressor and combustor
Blading - shaft - and seals
Forged steel
Calcium chloride

31. The purpose of a thrust bearing is to...
1. Drain the condensate from steam line and turbine casing. 2. Check oil level in bearing sumps or reservoir.
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. 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. Of all the positive displacement air compressors - the ______ compressor can deliver the highest discharge pressure.
Calcium chloride
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

33. The condenser extraction (condensate) pump normally supplies cooling Water to the...
Maximum axial seal clearance
1. Turbine casing drain coolers 2. gland steam condensers 3. air ejectors
Forged steel
Reciprocating

34. 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

35. The evaporator is where
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
The liquid refrigerant absorbs heat and boils
Reaction turbine

36. Ammonia refrigerant will
Not mix with mineral oils
The inlet valves
Blading - shaft - and seals
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

37. In a dual shaft gas turbine the load is driven by a
B2
Level
Is corrosive to non - ferrous metals in the presence of water
Low pressure turbine

38. Barring or turning gears are used to...
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
Regulate the flow of refrigerant to the evaporator
1. Drain the condensate from steam line and turbine casing. 2. Check oil level in bearing sumps or reservoir.

39. Connecting rods are usually made of...
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
The inlet valves
Forged steel

40. Before starting a small non - condensing turbine which of the following procedures would be performed?
1. sliding vane 2. rotary lobe 3. rotary screw
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.
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.