Test your basic knowledge |

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. Compressed air is not used for...
1. decrease steam pressure 2. increase steam
Cooling and aerating the steam in a steam condenser
The compressor and combustor
1. high temperature application 2. where chemical contamination is possible 3. on electrical equipment

2. Air in a surface condenser
1. increases the pressure 2. retards heat transfer 3. is cooled before being removed
The liquid refrigerant absorbs heat and boils
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.

3. Ammonia (R-717) is classified in Safety Group
Maximum axial seal clearance
Is corrosive to non - ferrous metals in the presence of water
Calcium chloride
B2

4. In order to keep the gas pass of a gas turbine clean - the following must be done
A controlled process of removing heat from a substance
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
B2

5. Steam turbine stationary nozzles serve to...
The fuel is injected into the cylinder by the injector
1. decrease steam pressure 2. increase steam
1. sliding vane 2. rotary lobe 3. rotary screw
Blading - shaft - and seals

6. NH3 (R-717) refrigerant
Is corrosive to non - ferrous metals in the presence of water
Reaction turbine
The fuel is injected into the cylinder by the injector
To remove heat from the condensing water

7. Ammonia refrigerant will
Not mix with mineral oils
The liquid refrigerant absorbs heat and boils
1. high temperature application 2. where chemical contamination is possible 3. on electrical equipment
It sprays jets of cooling water into the exhaust steam to condense it

8. Before starting a small non - condensing turbine which of the following procedures would be performed?
Blading - shaft - and seals
1. Drain the condensate from steam line and turbine casing. 2. Check oil level in bearing sumps or reservoir.
Low pressure turbine
1. high temperature application 2. where chemical contamination is possible 3. on electrical equipment

9. The condenser extraction (condensate) pump normally supplies cooling Water to the...
Level
1. Turbine casing drain coolers 2. gland steam condensers 3. air ejectors
Generator - condenser - receiver - expansion valve - evaporator - absorber - aqua pump.
It sprays jets of cooling water into the exhaust steam to condense it

10. The main purpose of a cooling tower is to...
The fuel is injected into the cylinder by the injector
Maximum axial seal clearance
To remove heat from the condensing water
Low pressure turbine

11. The deaerator is usually operated to maintain constant
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
Level
Cooling and aerating the steam in a steam condenser

12. 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. little or no water requirements 2. low installation cost 3. high power to mass ratio
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
The liquid refrigerant absorbs heat and boils

13. The jet condenser is so named because...
1. sliding vane 2. rotary lobe 3. rotary screw
The compressor and combustor
Is corrosive to non - ferrous metals in the presence of water
It sprays jets of cooling water into the exhaust steam to condense it

14. The purpose of a thrust bearing is to...
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
Level
1. high temperature application 2. where chemical contamination is possible 3. on electrical equipment

15. Condenser cooling water is usually controlled by...
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
The liquid refrigerant absorbs heat and boils
Blading - shaft - and seals
Solenoid valves

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...
1. fuel costs are high 2. the operating noise level is high 3. low thermal efficiency
Maximum axial seal clearance
The fuel is injected into the cylinder by the injector
Reaction turbine

17. In a dual shaft gas turbine the load is driven by a
Cooling and aerating the steam in a steam condenser
1. decrease steam pressure 2. increase steam
Low pressure turbine
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.

18. The inlet pipe to the compressor must be...
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
A controlled process of removing heat from a substance
At least as large as the compressor intake

19. CSA B-52 applies to...
Generator - condenser - receiver - expansion valve - evaporator - absorber - aqua pump.
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
1. imperfect injection 2. worn injectors 3. injection timed too early 4. improper grade of fuel

20. Refrigeration may be defined as...
Prevent the shaft from moving axially with the thrust
The liquid refrigerant absorbs heat and boils
Maximum axial seal clearance
A controlled process of removing heat from a substance

21. In the internal combustion engine - the purpose of the rocker arm is to operate
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
Is corrosive to non - ferrous metals in the presence of water
The inlet valves

22. 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

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

24. The disadvantages of a gas turbine include
Level
1. fuel costs are high 2. the operating noise level is high 3. low thermal efficiency
Reciprocating
Reaction turbine

25. Connecting rods are usually made of...
Forged steel
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. 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.

26. Refrigeration systems are purged
B2
To rid the system of non - condensable gases
A controlled process of removing heat from a substance
Reversing

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. 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
1. Turbine casing drain coolers 2. gland steam condensers 3. air ejectors
1. high temperature application 2. where chemical contamination is possible 3. on electrical equipment

28. A gas turbine would be chosen where these characteristics are advantageous
1. Turbine casing drain coolers 2. gland steam condensers 3. air ejectors
1. little or no water requirements 2. low installation cost 3. high power to mass ratio
Reciprocating
B2

29. The free piston gas generator in a gas turbine cycle will take the place of...
Solenoid valves
The compressor and combustor
1. design - construction and installation of refrigerating systems 2. operation and inspection of refrigerating systems
Low pressure turbine

30. Barring or turning gears are used 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
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
Cooling and aerating the steam in a steam condenser

31. In the common rail system used for injection of fuel into the diesel engine cylinder
Blading - shaft - and seals
The fuel is injected into the cylinder by the injector
Reaction turbine
1. fuel costs are high 2. the operating noise level is high 3. low thermal efficiency

32. The purpose of the expansion valve is to...
Maximum axial seal clearance
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
Regulate the flow of refrigerant to the evaporator

33. Three different designs of rotary compressors are...
1. sliding vane 2. rotary lobe 3. rotary screw
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
Blading - shaft - and seals

34. Rough running of a diesel engine is caused by...
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
The compressor and combustor
1. imperfect injection 2. worn injectors 3. injection timed too early 4. improper grade of fuel
To remove heat from the condensing water

35. 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
Maximum axial seal clearance
Reversing

36. The evaporator is where
1. imperfect injection 2. worn injectors 3. injection timed too early 4. improper grade of fuel
B2
The liquid refrigerant absorbs heat and boils
To remove heat from the condensing water

37. The component that allows for the switching from heating to cooling mode on an air heat pump is called a/an __________ valve?
Reversing
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. decrease steam pressure 2. increase steam

38. A pressure drop created across the turbine blades by the expanding steam is the basic operating principle of the...
The compressor and combustor
The fuel is injected into the cylinder by the injector
Reaction turbine
1. increases the pressure 2. retards heat transfer 3. is cooled before being removed

39. Of all the positive displacement air compressors - the ______ compressor can deliver the highest discharge pressure.
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
Reciprocating

40. The main components of an lithium bromide absorption refrigeration system are...
Solenoid valves
Generator - condenser - receiver - expansion valve - evaporator - absorber - aqua pump.
1. decrease steam pressure 2. increase steam
At least as large as the compressor intake