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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 main components of an lithium bromide absorption refrigeration system are...
Maximum axial seal clearance
Generator - condenser - receiver - expansion valve - evaporator - absorber - aqua pump.
The fuel is injected into the cylinder by the injector
Regulate the flow of refrigerant to the evaporator

2. Rough running of a diesel engine is caused by...
1. decrease steam pressure 2. increase steam
1. Drain the condensate from steam line and turbine casing. 2. Check oil level in bearing sumps or reservoir.
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

3. In the internal combustion engine - the purpose of the rocker arm is to operate
Low pressure turbine
1. imperfect injection 2. worn injectors 3. injection timed too early 4. improper grade of fuel
Blading - shaft - and seals
The inlet valves

4. In order to keep the gas pass of a gas turbine clean - the following must be done
It sprays jets of cooling water into the exhaust steam to condense it
The inlet valves
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

5. The evaporator is where
The fuel is injected into the cylinder by the injector
The liquid refrigerant absorbs heat and boils
At least as large as the compressor intake
1. decrease steam pressure 2. increase steam

6. Ammonia refrigerant will
Cooling and aerating the steam in a steam condenser
Not mix with mineral oils
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.

7. The main purpose of a cooling tower is to...
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
Reaction turbine
Regulate the flow of refrigerant to the evaporator

8. A gas turbine would be chosen where these characteristics are advantageous
1. imperfect injection 2. worn injectors 3. injection timed too early 4. improper grade of fuel
B2
1. high temperature application 2. where chemical contamination is possible 3. on electrical equipment
1. little or no water requirements 2. low installation cost 3. high power to mass ratio

9. The component that allows for the switching from heating to cooling mode on an air heat pump is called a/an __________ valve?
Reversing
Generator - condenser - receiver - expansion valve - evaporator - absorber - aqua pump.
1. Turbine casing drain coolers 2. gland steam condensers 3. air ejectors
1. design - construction and installation of refrigerating systems 2. operation and inspection of refrigerating systems

10. Connecting rods are usually made of...
The fuel is injected into the cylinder by the injector
Forged steel
1. sliding vane 2. rotary lobe 3. rotary screw
At least as large as the compressor intake

11. Air in a surface condenser
1. little or no water requirements 2. low installation cost 3. high power to mass ratio
1. increases the pressure 2. retards heat transfer 3. is cooled before being removed
Is corrosive to non - ferrous metals in the presence of water
1. high temperature application 2. where chemical contamination is possible 3. on electrical equipment

12. 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

13. In the common rail system used for injection of fuel into the diesel engine cylinder
1. decrease steam pressure 2. increase steam
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
The fuel is injected into the cylinder by the injector

14. Solid lubricants are used for...
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. 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.

15. Steam turbine stationary nozzles serve to...
Is corrosive to non - ferrous metals in the presence of water
1. decrease steam pressure 2. increase steam
The liquid refrigerant absorbs heat and boils
1. little or no water requirements 2. low installation cost 3. high power to mass ratio

16. Ammonia (R-717) is classified in Safety Group
B2
A controlled process of removing heat from a substance
1. high temperature application 2. where chemical contamination is possible 3. on electrical equipment
To remove heat from the condensing water

17. The free piston gas generator in a gas turbine cycle will take the place of...
Reciprocating
The inlet valves
Reaction turbine
The compressor and combustor

18. The purpose of a thrust bearing is to...
Generator - condenser - receiver - expansion valve - evaporator - absorber - aqua pump.
Reversing
Prevent the shaft from moving axially with the thrust
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. The disadvantages of a gas turbine include
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
It sprays jets of cooling water into the exhaust steam to condense it
Maximum axial seal clearance

20. 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
The fuel is injected into the cylinder by the injector
Reciprocating
B2

21. The jet condenser is so named because...
At least as large as the compressor intake
It sprays jets of cooling water into the exhaust steam to condense it
The compressor and combustor
Calcium chloride

22. Compressed air is not used for...
1. design - construction and installation of refrigerating systems 2. operation and inspection of refrigerating systems
Not mix with mineral oils
Cooling and aerating the steam in a steam condenser
Low pressure turbine

23. Condenser cooling water is usually controlled by...
Solenoid valves
1. increases the pressure 2. retards heat transfer 3. is cooled before being removed
1. imperfect injection 2. worn injectors 3. injection timed too early 4. improper grade of fuel
Level

24. In a dual shaft gas turbine the load is driven by a
Reciprocating
The inlet valves
Generator - condenser - receiver - expansion valve - evaporator - absorber - aqua pump.
Low pressure turbine

25. Brine used in ammonia indirect systems is usually made with
B2
1. increases the pressure 2. retards heat transfer 3. is cooled before being removed
Calcium chloride
Level

26. Three different designs of rotary compressors are...
Level
At least as large as the compressor intake
1. sliding vane 2. rotary lobe 3. rotary screw
Forged steel

27. During the start- up of some reaction steam turbines - the thrust block is pushed against a stop in the direction of the inlet for...
A controlled process of removing heat from a substance
Solenoid valves
1. little or no water requirements 2. low installation cost 3. high power to mass ratio
Maximum axial seal clearance

28. Of all the positive displacement air compressors - the ______ compressor can deliver the highest discharge pressure.
The fuel is injected into the cylinder by the injector
To rid the system of non - condensable gases
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

29. CSA B-52 applies to...
A controlled process of removing heat from a substance
Low pressure turbine
The fuel is injected into the cylinder by the injector
1. design - construction and installation of refrigerating systems 2. operation and inspection of refrigerating systems

30. The deaerator is usually operated to maintain constant
The compressor and combustor
Maximum axial seal clearance
Level
The fuel is injected into the cylinder by the injector

31. For a particular air sample - wet and dry bulb temperatures when plotted on a psychometric chart will help determine
To remove heat from the condensing water
Level
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. increases the pressure 2. retards heat transfer 3. is cooled before being removed

32. The inlet pipe to the compressor must be...
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
Reaction turbine
1. imperfect injection 2. worn injectors 3. injection timed too early 4. improper grade of fuel
At least as large as the compressor intake

33. A pressure drop created across the turbine blades by the expanding steam is the basic operating principle of the...
Reaction turbine
Prevent the shaft from moving axially with the thrust
Level
The liquid refrigerant absorbs heat and boils

34. Refrigeration systems are purged
Regulate the flow of refrigerant to the evaporator
To rid the system of non - condensable gases
1. increases the pressure 2. retards heat transfer 3. is cooled before being removed
Prevent the shaft from moving axially with the thrust

35. Refrigeration may be defined as...
A controlled process of removing heat from a substance
1. high temperature application 2. where chemical contamination is possible 3. on electrical equipment
Maximum axial seal clearance
1. increases the pressure 2. retards heat transfer 3. is cooled before being removed

36. Surging of dynamic air compressors can produce severe shock to the system and may be violent enough to damage the...
1. imperfect injection 2. worn injectors 3. injection timed too early 4. improper grade of fuel
A controlled process of removing heat from a substance
Blading - shaft - and seals
1. little or no water requirements 2. low installation cost 3. high power to mass ratio

37. The condenser extraction (condensate) pump normally supplies cooling Water to the...
Prevent the shaft from moving axially with the thrust
1. Turbine casing drain coolers 2. gland steam condensers 3. air ejectors
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. 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.

38. The purpose of the expansion valve is 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. Turbine casing drain coolers 2. gland steam condensers 3. air ejectors
Regulate the flow of refrigerant to the evaporator

39. NH3 (R-717) refrigerant
1. imperfect injection 2. worn injectors 3. injection timed too early 4. improper grade of fuel
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
Regulate the flow of refrigerant to the evaporator

40. Before starting a small non - condensing turbine which of the following procedures would be performed?
The fuel is injected into the cylinder by the injector
Maximum axial seal clearance
It sprays jets of cooling water into the exhaust steam to condense it
1. Drain the condensate from steam line and turbine casing. 2. Check oil level in bearing sumps or reservoir.