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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. In the common rail system used for injection of fuel into the diesel engine cylinder
1. sliding vane 2. rotary lobe 3. rotary screw
Forged steel
Reciprocating
The fuel is injected into the cylinder by the injector

2. The condenser extraction (condensate) pump normally supplies cooling Water to the...
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.
Reciprocating
1. Turbine casing drain coolers 2. gland steam condensers 3. air ejectors

3. Air in a surface condenser
1. increases the pressure 2. retards heat transfer 3. is cooled before being removed
Level
Reversing
Forged steel

4. In order to keep the gas pass of a gas turbine clean - the following must be done
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 compressor and combustor
1. Drain the condensate from steam line and turbine casing. 2. Check oil level in bearing sumps or reservoir.
1. design - construction and installation of refrigerating systems 2. operation and inspection of refrigerating systems

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

6. Brine used in ammonia indirect systems is usually made with
Not mix with mineral oils
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.
Low pressure turbine
Calcium chloride

7. The purpose of a thrust bearing is to...
Solenoid valves
Prevent the shaft from moving axially with the thrust
1. little or no water requirements 2. low installation cost 3. high power to mass ratio
Reversing

8. The jet condenser is so named because...
Cooling and aerating the steam in a steam condenser
It sprays jets of cooling water into the exhaust steam to condense it
Blading - shaft - and seals
Reversing

9. The main components of an lithium bromide absorption refrigeration system are...
A controlled process of removing heat from a substance
Generator - condenser - receiver - expansion valve - evaporator - absorber - aqua pump.
1. little or no water requirements 2. low installation cost 3. high power to mass ratio
Low pressure turbine

10. The main purpose of a cooling tower is to...
1. design - construction and installation of refrigerating systems 2. operation and inspection of refrigerating systems
To remove heat from the condensing water
1. fuel costs are high 2. the operating noise level is high 3. low thermal efficiency
B2

11. Three different designs of rotary compressors are...
Reciprocating
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. sliding vane 2. rotary lobe 3. rotary screw

12. NH3 (R-717) refrigerant
1. Turbine casing drain coolers 2. gland steam condensers 3. air ejectors
Is corrosive to non - ferrous metals in the presence of water
The inlet valves
Forged steel

13. Connecting rods are usually made of...
1. Drain the condensate from steam line and turbine casing. 2. Check oil level in bearing sumps or reservoir.
Solenoid valves
Forged steel
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.

14. Steam turbine stationary nozzles serve to...
It sprays jets of cooling water into the exhaust steam to condense it
The compressor and combustor
1. decrease steam pressure 2. increase steam
The liquid refrigerant absorbs heat and boils

15. In a dual shaft gas turbine the load is driven by a
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
A controlled process of removing heat from a substance
1. Turbine casing drain coolers 2. gland steam condensers 3. air ejectors

16. Condenser cooling water is usually controlled by...
1. fuel costs are high 2. the operating noise level is high 3. low thermal efficiency
Solenoid valves
At least as large as the compressor intake
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

17. CSA B-52 applies to...
1. design - construction and installation of refrigerating systems 2. operation and inspection of refrigerating systems
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
Cooling and aerating the steam in a steam condenser
Generator - condenser - receiver - expansion valve - evaporator - absorber - aqua pump.

18. Ammonia refrigerant will
Is corrosive to non - ferrous metals in the presence of water
To remove heat from the condensing water
Forged steel
Not mix with mineral oils

19. The purpose of the expansion valve is 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
Blading - shaft - and seals
Generator - condenser - receiver - expansion valve - evaporator - absorber - aqua pump.
Regulate the flow of refrigerant to the evaporator

20. 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.
1. little or no water requirements 2. low installation cost 3. high power to mass ratio
Calcium chloride
The fuel is injected into the cylinder by the injector

21. The deaerator is usually operated to maintain constant
Solenoid valves
Level
1. design - construction and installation of refrigerating systems 2. operation and inspection of refrigerating systems
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

22. In the internal combustion engine - the purpose of the rocker arm is to operate
The inlet valves
Not mix with mineral oils
To remove heat from the condensing water
Prevent the shaft from moving axially with the thrust

23. The disadvantages of a gas turbine include
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
Is corrosive to non - ferrous metals in the presence of water
Level

24. Compressed air is not used for...
1. imperfect injection 2. worn injectors 3. injection timed too early 4. improper grade of fuel
Blading - shaft - and seals
Cooling and aerating the steam in a steam condenser
1. increases the pressure 2. retards heat transfer 3. is cooled before being removed

25. Refrigeration systems are purged
Reaction turbine
Level
The inlet valves
To rid the system of non - condensable gases

26. 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
Low pressure turbine
1. Drain the condensate from steam line and turbine casing. 2. Check oil level in bearing sumps or reservoir.
Regulate the flow of refrigerant to the evaporator

27. For a particular air sample - wet and dry bulb temperatures when plotted on a psychometric chart will help determine
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. imperfect injection 2. worn injectors 3. injection timed too early 4. improper grade of fuel
Is corrosive to non - ferrous metals in the presence of water
Low pressure turbine

28. A pressure drop created across the turbine blades by the expanding steam is the basic operating principle of the...
Reaction turbine
Reversing
The liquid refrigerant absorbs heat and boils
Low pressure turbine

29. 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

30. Ammonia (R-717) is classified in Safety Group
B2
Prevent the shaft from moving axially with the thrust
Cooling and aerating the steam in a steam condenser
1. imperfect injection 2. worn injectors 3. injection timed too early 4. improper grade of fuel

31. The free piston gas generator in a gas turbine cycle will take the place of...
To remove heat from the condensing water
Maximum axial seal clearance
Cooling and aerating the steam in a steam condenser
The compressor and combustor

32. Solid lubricants are used for...
1. high temperature application 2. where chemical contamination is possible 3. on electrical equipment
The inlet valves
The fuel is injected into the cylinder by the injector
Calcium chloride

33. A gas turbine would be chosen where these characteristics are advantageous
Low pressure turbine
Prevent the shaft from moving axially with the thrust
1. sliding vane 2. rotary lobe 3. rotary screw
1. little or no water requirements 2. low installation cost 3. high power to mass ratio

34. Refrigeration may be defined as...
The compressor and combustor
A controlled process of removing heat from a substance
Maximum axial seal clearance
To remove heat from the condensing water

35. During the start- up of some reaction steam turbines - the thrust block is pushed against a stop in the direction of the inlet for...
Low pressure turbine
The compressor and combustor
Prevent the shaft from moving axially with the thrust
Maximum axial seal clearance

36. Surging of dynamic air compressors can produce severe shock to the system and may be violent enough to damage the...
Blading - shaft - and seals
1. imperfect injection 2. worn injectors 3. injection timed too early 4. improper grade of fuel
1. sliding vane 2. rotary lobe 3. rotary screw
Calcium chloride

37. The inlet pipe to the compressor must be...
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
Blading - shaft - and seals
At least as large as the compressor intake

38. The evaporator is where
The liquid refrigerant absorbs heat and boils
1. little or no water requirements 2. low installation cost 3. high power to mass ratio
Not mix with mineral oils
It sprays jets of cooling water into the exhaust steam to condense it

39. The component that allows for the switching from heating to cooling mode on an air heat pump is called a/an __________ valve?
Reversing
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.
The compressor and combustor

40. Barring or turning gears are used to...
Solenoid valves
A controlled process of removing heat from a substance
To remove heat from the condensing 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