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Power Engineering 5

Instructions:

Answer 40 questions in 15 minutes.
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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. Ammonia (R-717) is classified in Safety Group
B2
1. fuel costs are high 2. the operating noise level is high 3. low thermal efficiency
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
Reaction turbine

2. 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

3. The inlet pipe to the compressor must be...
1. imperfect injection 2. worn injectors 3. injection timed too early 4. improper grade of fuel
The compressor and combustor
At least as large as the compressor intake
Generator - condenser - receiver - expansion valve - evaporator - absorber - aqua pump.

4. A gas turbine would be chosen where these characteristics are advantageous
To rid the system of non - condensable gases
1. little or no water requirements 2. low installation cost 3. high power to mass ratio
The inlet valves
1. increases the pressure 2. retards heat transfer 3. is cooled before being removed

5. Rough running of a diesel engine is caused by...
Reaction turbine
Not mix with mineral oils
1. imperfect injection 2. worn injectors 3. injection timed too early 4. improper grade of fuel
1. little or no water requirements 2. low installation cost 3. high power to mass ratio

6. Barring or turning gears are used to...
To remove heat from the condensing water
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
Regulate the flow of refrigerant to the evaporator

7. In a dual shaft gas turbine the load is driven by a
Low pressure turbine
The compressor and combustor
1. decrease steam pressure 2. increase steam
Not mix with mineral oils

8. Ammonia refrigerant will
Level
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
Not mix with mineral oils

9. The deaerator is usually operated to maintain constant
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
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
Level
Generator - condenser - receiver - expansion valve - evaporator - absorber - aqua pump.

10. Compressed air is not used for...
The compressor and combustor
1. Drain the condensate from steam line and turbine casing. 2. Check oil level in bearing sumps or reservoir.
Cooling and aerating the steam in a steam condenser
To rid the system of non - condensable gases

11. The jet condenser is so named because...
1. increases the pressure 2. retards heat transfer 3. is cooled before being removed
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 inlet valves
It sprays jets of cooling water into the exhaust steam to condense it

12. CSA B-52 applies to...
Solenoid valves
Calcium chloride
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

13. A pressure drop created across the turbine blades by the expanding steam is the basic operating principle of the...
Reaction turbine
Reciprocating
Low pressure turbine
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

14. Steam turbine stationary nozzles serve to...
1. decrease steam pressure 2. increase steam
1. high temperature application 2. where chemical contamination is possible 3. on electrical equipment
The compressor and combustor
Not mix with mineral oils

15. The main components of an lithium bromide absorption refrigeration system are...
Generator - condenser - receiver - expansion valve - evaporator - absorber - aqua pump.
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
It sprays jets of cooling water into the exhaust steam to condense it

16. Solid lubricants are used for...
To rid the system of non - condensable gases
The compressor and combustor
At least as large as the compressor intake
1. high temperature application 2. where chemical contamination is possible 3. on electrical equipment

17. The component that allows for the switching from heating to cooling mode on an air heat pump is called a/an __________ valve?
B2
1. sliding vane 2. rotary lobe 3. rotary screw
1. Drain the condensate from steam line and turbine casing. 2. Check oil level in bearing sumps or reservoir.
Reversing

18. Three different designs of rotary compressors are...
1. sliding vane 2. rotary lobe 3. rotary screw
Solenoid valves
To rid the system of non - condensable gases
1. high temperature application 2. where chemical contamination is possible 3. on electrical equipment

19. 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
Forged steel
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

20. The purpose of the expansion valve is to...
Regulate the flow of refrigerant to the evaporator
Low pressure turbine
1. increases the pressure 2. retards heat transfer 3. is cooled before being removed
Generator - condenser - receiver - expansion valve - evaporator - absorber - aqua pump.

21. Of all the positive displacement air compressors - the ______ compressor can deliver the highest discharge pressure.
Is corrosive to non - ferrous metals in the presence of water
Calcium chloride
Reciprocating
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

22. NH3 (R-717) refrigerant
The fuel is injected into the cylinder by the injector
To rid the system of non - condensable gases
Forged steel
Is corrosive to non - ferrous metals in the presence of water

23. Refrigeration may be defined as...
1. imperfect injection 2. worn injectors 3. injection timed too early 4. improper grade of fuel
B2
Regulate the flow of refrigerant to the evaporator
A controlled process of removing heat from a substance

24. For a particular air sample - wet and dry bulb temperatures when plotted on a psychometric chart will help determine
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.
It sprays jets of cooling water into the exhaust steam to condense it

25. Condenser cooling water is usually controlled by...
1. imperfect injection 2. worn injectors 3. injection timed too early 4. improper grade of fuel
Solenoid valves
Maximum axial seal clearance
The liquid refrigerant absorbs heat and boils

26. Refrigeration systems are purged
Calcium chloride
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 rid the system of non - condensable gases
1. Turbine casing drain coolers 2. gland steam condensers 3. air ejectors

27. In order to keep the gas pass of a gas turbine clean - the following must be done
1. decrease steam pressure 2. increase steam
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. 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

28. Air in a surface condenser
Generator - condenser - receiver - expansion valve - evaporator - absorber - aqua pump.
Level
At least as large as the compressor intake
1. increases the pressure 2. retards heat transfer 3. is cooled before being removed

29. The condenser extraction (condensate) pump normally supplies cooling Water to the...
1. Turbine casing drain coolers 2. gland steam condensers 3. air ejectors
Forged steel
A controlled process of removing heat from a substance
Low pressure turbine

30. 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
1. fuel costs are high 2. the operating noise level is high 3. low thermal efficiency
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

31. In the internal combustion engine - the purpose of the rocker arm is to operate
It sprays jets of cooling water into the exhaust steam to condense it
Maximum axial seal clearance
The inlet valves
The liquid refrigerant absorbs heat and boils

32. The purpose of a thrust bearing is to...
Prevent the shaft from moving axially with the thrust
1. sliding vane 2. rotary lobe 3. rotary screw
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
B2

33. Brine used in ammonia indirect systems is usually made with
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.
1. high temperature application 2. where chemical contamination is possible 3. on electrical equipment
Calcium chloride

34. Before starting a small non - condensing turbine which of the following procedures would be performed?
Reaction turbine
1. Drain the condensate from steam line and turbine casing. 2. Check oil level in bearing sumps or reservoir.
To remove heat from the condensing water
Reversing

35. In the common rail system used for injection of fuel into the diesel engine cylinder
Cooling and aerating the steam in a steam condenser
1. Turbine casing drain coolers 2. gland steam condensers 3. air ejectors
Not mix with mineral oils
The fuel is injected into the cylinder by the injector

36. During the start- up of some reaction steam turbines - the thrust block is pushed against a stop in the direction of the inlet for...
Not mix with mineral oils
Maximum axial seal clearance
The inlet valves
1. design - construction and installation of refrigerating systems 2. operation and inspection of refrigerating systems

37. Connecting rods are usually made of...
1. design - construction and installation of refrigerating systems 2. operation and inspection of refrigerating systems
1. increases the pressure 2. retards heat transfer 3. is cooled before being removed
The liquid refrigerant absorbs heat and boils
Forged steel

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

39. The free piston gas generator in a gas turbine cycle will take the place of...
It sprays jets of cooling water into the exhaust steam to condense it
Reversing
Level
The compressor and combustor

40. The main purpose of a cooling tower is to...
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
1. design - construction and installation of refrigerating systems 2. operation and inspection of refrigerating systems
To remove heat from the condensing water