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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. high temperature application 2. where chemical contamination is possible 3. on electrical equipment
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
1. imperfect injection 2. worn injectors 3. injection timed too early 4. improper grade of fuel

2. The purpose of the expansion valve is to...
Blading - shaft - and seals
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

3. Ammonia refrigerant will
Generator - condenser - receiver - expansion valve - evaporator - absorber - aqua pump.
Not mix with mineral oils
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

4. 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

5. Refrigeration systems are purged
To rid the system of non - condensable gases
Calcium chloride
Generator - condenser - receiver - expansion valve - evaporator - absorber - aqua pump.
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

6. Solid lubricants are used for...
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
Cooling and aerating the steam in a steam condenser
Regulate the flow of refrigerant to the evaporator

7. 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
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.
B2

8. Condenser cooling water is usually controlled by...
Blading - shaft - and seals
Low pressure turbine
Solenoid valves
The inlet valves

9. Of all the positive displacement air compressors - the ______ compressor can deliver the highest discharge pressure.
1. design - construction and installation of refrigerating systems 2. operation and inspection of refrigerating systems
Reciprocating
To remove heat from the condensing water
Blading - shaft - and seals

10. NH3 (R-717) refrigerant
Forged steel
Is corrosive to non - ferrous metals in the presence of water
It sprays jets of cooling water into the exhaust steam to condense it
The liquid refrigerant absorbs heat and boils

11. The main purpose of a cooling tower is to...
To rid the system of non - condensable gases
To remove heat from the condensing water
The fuel is injected into the cylinder by the injector
Regulate the flow of refrigerant to the evaporator

12. Brine used in ammonia indirect systems is usually made with
1. Drain the condensate from steam line and turbine casing. 2. Check oil level in bearing sumps or reservoir.
Not mix with mineral oils
Calcium chloride
Solenoid valves

13. The purpose of a thrust bearing is to...
Prevent the shaft from moving axially with the thrust
Blading - shaft - and seals
To remove heat from the condensing water
Regulate the flow of refrigerant to the evaporator

14. Compressed air is not used for...
Forged steel
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

15. The condenser extraction (condensate) pump normally supplies cooling Water to the...
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
A controlled process of removing heat from a substance
The fuel is injected into the cylinder by the injector
1. Turbine casing drain coolers 2. gland steam condensers 3. air ejectors

16. The component that allows for the switching from heating to cooling mode on an air heat pump is called a/an __________ valve?
Reversing
Is corrosive to non - ferrous metals in the presence of water
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
To remove heat from the condensing water

17. The disadvantages of a gas turbine include
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
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

18. During the start- up of some reaction steam turbines - the thrust block is pushed against a stop in the direction of the inlet for...
Forged steel
1. little or no water requirements 2. low installation cost 3. high power to mass ratio
Reciprocating
Maximum axial seal clearance

19. In the internal combustion engine - the purpose of the rocker arm is to operate
1. high temperature application 2. where chemical contamination is possible 3. on electrical equipment
1. decrease steam pressure 2. increase steam
Is corrosive to non - ferrous metals in the presence of water
The inlet valves

20. The evaporator is where
The liquid refrigerant absorbs heat and boils
1. high temperature application 2. where chemical contamination is possible 3. on electrical equipment
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.

21. The main components of an lithium bromide absorption refrigeration system are...
Level
Low pressure turbine
1. high temperature application 2. where chemical contamination is possible 3. on electrical equipment
Generator - condenser - receiver - expansion valve - evaporator - absorber - aqua pump.

22. Before starting a small non - condensing turbine which of the following procedures would be performed?
1. Drain the condensate from steam line and turbine casing. 2. Check oil level in bearing sumps or reservoir.
The inlet valves
Reciprocating
1. increases the pressure 2. retards heat transfer 3. is cooled before being removed

23. Ammonia (R-717) is classified in Safety Group
The liquid refrigerant absorbs heat and boils
B2
A controlled process of removing heat from a substance
Blading - shaft - and seals

24. In the common rail system used for injection of fuel into the diesel engine cylinder
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.
1. little or no water requirements 2. low installation cost 3. high power to mass ratio
The fuel is injected into the cylinder by the injector

25. Connecting rods are usually made of...
Forged steel
The inlet valves
1. increases the pressure 2. retards heat transfer 3. is cooled before being removed
To rid the system of non - condensable gases

26. Surging of dynamic air compressors can produce severe shock to the system and may be violent enough to damage the...
1. high temperature application 2. where chemical contamination is possible 3. on electrical equipment
Blading - shaft - and seals
At least as large as the compressor intake
A controlled process of removing heat from a substance

27. CSA B-52 applies to...
1. design - construction and installation of refrigerating systems 2. operation and inspection of refrigerating systems
To remove heat from the condensing water
Reaction turbine
The compressor and combustor

28. 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
To rid the system of non - condensable gases
1. increases the pressure 2. retards heat transfer 3. is cooled before being removed
1. little or no water requirements 2. low installation cost 3. high power to mass ratio

29. In a dual shaft gas turbine the load is driven by a
It sprays jets of cooling water into the exhaust steam to condense it
1. design - construction and installation of refrigerating systems 2. operation and inspection of refrigerating systems
The compressor and combustor
Low pressure turbine

30. The inlet pipe to the compressor must be...
Reaction turbine
Prevent the shaft from moving axially with the thrust
Calcium chloride
At least as large as the compressor intake

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

32. Steam turbine stationary nozzles serve to...
Regulate the flow of refrigerant to the evaporator
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.
1. decrease steam pressure 2. increase steam

33. The jet condenser is so named because...
A controlled process of removing heat from a substance
1. increases the pressure 2. retards heat transfer 3. is cooled before being removed
At least as large as the compressor intake
It sprays jets of cooling water into the exhaust steam to condense it

34. The deaerator is usually operated to maintain constant
1. increases the pressure 2. retards heat transfer 3. is cooled before being removed
1. decrease steam pressure 2. increase steam
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.

35. Refrigeration may be defined as...
Maximum axial seal clearance
It sprays jets of cooling water into the exhaust steam to condense it
The inlet valves
A controlled process of removing heat from a substance

36. Air in a surface condenser
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
Generator - condenser - receiver - expansion valve - evaporator - absorber - aqua pump.
1. high temperature application 2. where chemical contamination is possible 3. on electrical equipment

37. 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
The compressor and combustor
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

38. Three different designs of rotary compressors are...
1. high temperature application 2. where chemical contamination is possible 3. on electrical equipment
1. sliding vane 2. rotary lobe 3. rotary screw
Level
The liquid refrigerant absorbs heat and boils

39. A pressure drop created across the turbine blades by the expanding steam is the basic operating principle of the...
Low pressure turbine
Reaction turbine
Regulate the flow of refrigerant to the evaporator
1. increases the pressure 2. retards heat transfer 3. is cooled before being removed

40. For a particular air sample - wet and dry bulb temperatures when plotted on a psychometric chart will help determine
Prevent the shaft from moving axially with the thrust
1. decrease steam pressure 2. increase steam
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.
Cooling and aerating the steam in a steam condenser