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. Air in a surface condenser
1. high temperature application 2. where chemical contamination is possible 3. on electrical equipment
1. increases the pressure 2. retards heat transfer 3. is cooled before being removed
Generator - condenser - receiver - expansion valve - evaporator - absorber - aqua pump.
To remove heat from the condensing water

2. In the common rail system used for injection of fuel into the diesel engine cylinder
The fuel is injected into the cylinder by the injector
Reciprocating
Regulate the flow of refrigerant to the evaporator
Reaction turbine

3. The free piston gas generator in a gas turbine cycle will take the place of...
Forged steel
At least as large as the compressor intake
The compressor and combustor
1. Turbine casing drain coolers 2. gland steam condensers 3. air ejectors

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. 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. fuel costs are high 2. the operating noise level is high 3. low thermal efficiency
To rid the system of non - condensable gases
1. Turbine casing drain coolers 2. gland steam condensers 3. air ejectors

6. The main components of an lithium bromide absorption refrigeration system are...
Generator - condenser - receiver - expansion valve - evaporator - absorber - aqua pump.
Regulate the flow of refrigerant to the evaporator
Calcium chloride
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

7. NH3 (R-717) refrigerant
Low pressure turbine
Blading - shaft - and seals
Reversing
Is corrosive to non - ferrous metals in the presence of water

8. The component that allows for the switching from heating to cooling mode on an air heat pump is called a/an __________ valve?
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
Reversing
At least as large as the compressor intake
It sprays jets of cooling water into the exhaust steam to condense it

9. The jet condenser is so named because...
1. little or no water requirements 2. low installation cost 3. high power to mass ratio
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 liquid refrigerant absorbs heat and boils
It sprays jets of cooling water into the exhaust steam to condense it

10. The purpose of the expansion valve is to...
A controlled process of removing heat from a substance
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
Regulate the flow of refrigerant to the evaporator

11. 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
1. Drain the condensate from steam line and turbine casing. 2. Check oil level in bearing sumps or reservoir.
Is corrosive to non - ferrous metals in the presence of water
Generator - condenser - receiver - expansion valve - evaporator - absorber - aqua pump.

12. The main purpose of a cooling tower is to...
To remove heat from the condensing water
1. fuel costs are high 2. the operating noise level is high 3. low thermal efficiency
Forged steel
At least as large as the compressor intake

13. The inlet pipe to the compressor must be...
1. decrease steam pressure 2. increase steam
At least as large as the compressor intake
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

14. Three different designs of rotary compressors are...
The compressor and combustor
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
A controlled process of removing heat from a substance

15. The purpose of a thrust bearing is to...
Prevent the shaft from moving axially with the thrust
Cooling and aerating the steam in a steam condenser
Reciprocating
Forged steel

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. 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.
Maximum axial seal clearance
1. sliding vane 2. rotary lobe 3. rotary screw
B2

17. CSA B-52 applies to...
1. design - construction and installation of refrigerating systems 2. operation and inspection of refrigerating systems
Maximum axial seal clearance
1. little or no water requirements 2. low installation cost 3. high power to mass ratio
1. imperfect injection 2. worn injectors 3. injection timed too early 4. improper grade of fuel

18. In the internal combustion engine - the purpose of the rocker arm is to operate
Forged steel
Is corrosive to non - ferrous metals in the presence of water
To remove heat from the condensing water
The inlet valves

19. Condenser cooling water is usually controlled by...
Solenoid valves
Reciprocating
A controlled process of removing heat from a substance
At least as large as the compressor intake

20. Connecting rods are usually made of...
A controlled process of removing heat from a substance
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
Reciprocating

21. The evaporator is where
Cooling and aerating the steam in a steam condenser
1. fuel costs are high 2. the operating noise level is high 3. low thermal efficiency
The liquid refrigerant absorbs heat and boils
Blading - shaft - and seals

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

23. 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.
Is corrosive to non - ferrous metals in the presence of water
Solenoid valves
Reciprocating

24. Solid lubricants are used for...
1. high temperature application 2. where chemical contamination is possible 3. on electrical equipment
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
To remove heat from the condensing water

25. The deaerator is usually operated to maintain constant
1. high temperature application 2. where chemical contamination is possible 3. on electrical equipment
Level
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

26. Refrigeration may be defined as...
A controlled process of removing heat from a substance
Not mix with mineral oils
1. imperfect injection 2. worn injectors 3. injection timed too early 4. improper grade of fuel
Cooling and aerating the steam in a steam condenser

27. The disadvantages of a gas turbine include
A controlled process of removing heat from a substance
1. fuel costs are high 2. the operating noise level is high 3. low thermal efficiency
Low pressure turbine
Level

28. A pressure drop created across the turbine blades by the expanding steam is the basic operating principle of the...
To rid the system of non - condensable gases
1. decrease steam pressure 2. increase steam
Reciprocating
Reaction turbine

29. Compressed air is not used for...
At least as large as the compressor intake
Cooling and aerating the steam in a steam condenser
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. high temperature application 2. where chemical contamination is possible 3. on electrical equipment

30. In a dual shaft gas turbine the load is driven by a
Solenoid valves
Low pressure turbine
Prevent the shaft from moving axially with the thrust
Calcium chloride

31. Of all the positive displacement air compressors - the ______ compressor can deliver the highest discharge pressure.
Reciprocating
The inlet valves
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
Maximum axial seal clearance

32. Ammonia refrigerant will
Solenoid valves
B2
Regulate the flow of refrigerant to the evaporator
Not mix with mineral oils

33. Refrigeration systems are purged
1. Drain the condensate from steam line and turbine casing. 2. Check oil level in bearing sumps or reservoir.
To rid the system of non - condensable gases
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

34. Steam turbine stationary nozzles serve to...
Reaction turbine
1. design - construction and installation of refrigerating systems 2. operation and inspection of refrigerating systems
1. fuel costs are high 2. the operating noise level is high 3. low thermal efficiency
1. decrease steam pressure 2. increase steam

35. Rough running of a diesel engine is caused by...
B2
1. imperfect injection 2. worn injectors 3. injection timed too early 4. improper grade of fuel
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.

36. Brine used in ammonia indirect systems is usually made with
Calcium chloride
To rid the system of non - condensable gases
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

37. A gas turbine would be chosen where these characteristics are advantageous
The liquid refrigerant absorbs heat and boils
1. little or no water requirements 2. low installation cost 3. high power to mass ratio
Reaction turbine
1. imperfect injection 2. worn injectors 3. injection timed too early 4. improper grade of fuel

38. Barring or turning gears are used to...
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. rotate the turbine shaft periodically to prevent it from sagging 2. rotate the shaft at slow speed when the turbine is not in service
Maximum axial seal clearance
Generator - condenser - receiver - expansion valve - evaporator - absorber - aqua pump.

39. For a particular air sample - wet and dry bulb temperatures when plotted on a psychometric chart will help determine
Reciprocating
1. design - construction and installation of refrigerating systems 2. operation and inspection of refrigerating systems
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.
Solenoid valves

40. Ammonia (R-717) is classified in Safety Group
Reaction turbine
B2
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