Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

5th Class PWR ENG > BOOK 1, All Quizzes > Flashcards

BOOK 1, All Quizzes Flashcards

1
Q

MC CHAPTER 1:
1. One reason that low capacity watertube boilers are rarely used for low pressure heating is that they?

A) Require less supervision
B) Cost Less
C) Have the flue gas flowing inside the tubes
D) Require more supervision for water treatment

A

MC:
D

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

MC CHAPTER 1:
2.The heating surface of a copper-tubular boiler consists of:

A) Drums and headers
B) A continuous copper tube
C) Straight firetube
D) Bent tube attached to drums

A

MC:

B

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

MC CHAPTER 1:
3.The type of watertube boiler that has an upper drum and two lower drums is a(n) _______ type.

A) “O”
B) “B”
C) “A”
D) “D”

A

MC:

C

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

MC CHAPTER 1:
4.An advantage of a packaged boiler would be:

A) Ease of installation
B) Constructed entirely on site
C) It can be built to any height
D) No water treatment required

A

MC:

A

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

MC CHAPTER 1:
5.The purpose of attaching “fins” to watertube is to:

A) Provide for a swirling action of the flue gases
B) Increased the heating surface
C) Increased the strength of the tubes
D) Provide for better water circulation

A

MC:

B

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

MC CHAPTER 2:
1.Cast- iron sectional boilers have flue gas passages which:

A) Are often termed “breaching”
B) Increase heat transfer
C) Receive radiant heat only
D) Act as boiler water legs

A

MC:

B

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

MC CHAPTER 2:
2.A machine and slightly tapered piece of pipe found in sectional heating boilers is referred to as a:

A) Tie rod
B) Tapered bushing
C) Push nipple
D) Cleanout nipple

A

MC:

C

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

MC CHAPTER 2:
3.An advantage of a cast iron boiler is:

A) Its large capacity
B) Light weight resulting in lesser foundation requirements
C) Its ability to withstand high pressure
D) The choice of assembly location

A

MC:

D

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

MC CHAPTER 2:
4.Small capacity heating boilers operate most efficiently at:

A) Continuous full load
B) Any type of load
C) Approximately 75% load
D) Approximately 66% load

A

MC:

A

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

MC CHAPTER 2:
5.A modular cast-iron heating boiler:

A) Has a number of burners which start and stop simultaneously
B) Consists of a number of individually operated sectional boilers
C) Cannot be enclosed in a single casing
D) Does not have continuous water flow through each module

A

MC:

B

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

MC CHAPTER 2:
6.Cast-iron boiler sections maximize heat transfer by:

A) Using four push nipples per section
B) Vertical firing
C) Exposing as large surface as possible to the hot gases
D) Utilizing an external furnace

A

MC:

C

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

MC CHAPTER 3:
1.The maximum pressure for a low-pressure steam boiler is:

A) 103 kPa (14.7 psi)
B) 160 kPa (23.2 psi)
C) 250 kPa (36.2 psi)
D) 1100 kPa (160 psi)

A

MC:

A

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

MC CHAPTER 3:
2.The main part of a high-pressure firetube boiler is called the:

A) Windbox
B) Furnace
C) Shell
D) Drum

A

MC:

C

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

MC CHAPTER 3:
3.The pressure and temperature limiting factors for steam units used for heating and hot water heating boilers are:

A) 121 kPa or 103 °C (17.5 psi or 217 °F) for steam units and 1100 kPa (160 psi) for hot water units

B) 1100 kPa (160 psi) for steam units and 103 kPa, or 121 °C (14.7 psi or 250 °F) for hot water units

C) 103 kPa (14.7 psi) for steam units and 121 °C, or 1100 kPa (250 °F or 160 psi) for hot water units

D) 1100 kPa or 121 °C (160 psi or 250 °F) for steam units, and 1100 kPa for hot water units

A

MC:

C

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

MC CHAPTER 3:
4.In a vertical firetube boiler, the steam space is located:

A) In a separate chamber
B) In a compartment on the side
C) At the lower part of the shell
D) At the top of the shell

A

MC:

D

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

MC CHAPTER 3:
5.The forerunner of the modern packaged firetube heating boiler was the:

A) Internally fired horizontal return tubular (HRT) boiler
B) Internally fired scotch marine boiler
C) Externally fired Scotch marine boiler
D) Externally fired horizontal return tubular (HRT) boiler

A

MC:

B

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

MC CHAPTER 3:
6.The chief advantage of a packaged heating boiler is:

A) Its compactness
B) Mass production ability
C) higher pressure rating
D) Its higher factor of safety

A

MC:

B

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

MC CHAPTER 3:
7.In a vertical firetube boiler:

A) The water passes through the inside of the tubes
B) The steam accumulates in the lower part of the boiler shell
C) The horizontal shell has vertical firetubes at each end
D) The upper part of the tubes are cooled by steam

A

MC:

D

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

MC CHAPTER 3:
8.The “pipe” is a common term for:

A) The combustion chamber of a vertical tubeless boiler
B) The drain on an immersion boiler
C) The water jacket of a vertical boiler
D) The steam outlet of an electrode boiler

A

MC:

A

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

MC CHAPTER 3:
9.In which of these boilers does the firing occur in a downward direction?

A) Immersion electrode
B) Vertical electric
C) Vertical firetube
D) Vertical tubeless

A

MC:

D

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

MC CHAPTER 3:
10.One feature of a vertical tubeless boiler that would not be found on the vertical firetube boiler is:

A) Water level control
B) Burners
C) Refractory
D) Water column

A

MC:

C

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

MC CHAPTER 4:
1.An immersion-type electric boiler has:

A) Electrode
B) No steam space
C) Elements
D)Tube Bundles

A

MC:

C

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
23
Q

MC CHAPTER 4:
2.The load on an electrode-type electric boiler is maintained by the:

A) Amount of steam space in the boiler
B) Amount of electrode covered by water
C) Outdoor temperature
D) Amount of Current flowing through the elements

A

MC:

B

24
Q

MC CHAPTER 4:
3.Output of an immersion electric boiler is regulated by altering the:

A) Water level relative to the electrode
B) Water level relative to the elements
C) Amount of current flowing through the water
D) Amount of current flowing through the elements

A

MC:

D

25
Q

MC CHAPTER 4:
4.A main disadvantage of an electric boiler is the:

A) High cost of manufacturing
B) High cost of the electricity
C) Inefficiency of the energy transfer
D) Space requirements per unit output

A

MC:

B

26
Q

MC CHAPTER 4:
5.Electric boilers:

A) Require tall stacks for pollution disbursement
B) Tend not to be compact
C) Require sootblowers when the fuel is coal
D) Have energy conversion efficiencies close to 100%

A

MC:

D

27
Q

MC CHAPTER 4:
6.A salinity feeder is an important component of a/an ________________ boiler.

A) Vertical tubeless
B) Electrode-type electric
C) Vertical firetube
D) Immersion electric

A

MC:

B

28
Q

MC CHAPTER 5:
1.The type of gauge that is commonly used to indicate steam pressure inside a boiler is the __________ gauge.

A) Gauge glass
B) Bourdon tube
C) Safety
D) Direct attached

A

MC:

B

29
Q

MC CHAPTER 5:
2.To protect the pressure gauge from high temperature of the steam a ______________ is installed between the steam and the gauge.

A) Check valve
B) Stop valve
C) Vacuum tube
D) Pipe system

A

MC:

D

30
Q

MC CHAPTER 5:
3.You would test boiler pressure gauge while in service by using a ______________.

A) Dead weight tester
B) Hydraulic tester
C) Master test gauge
D) Pop test

A

MC:

C

31
Q

MC CHAPTER 5:
4.The ____________ valve protects the boiler when pressure approaches its maximum allowable working pressure.

A) Vent
B) Safety
C) Check
D) Blow off

A

MC:

B

32
Q

MC CHAPTER 5:
5.The lowest visible part of the water gauge glass will be above the __________ recommended by the manufacturer.

A) Lowest permissible water level
B) Fire Line
C) Top of the firetube
D) Middle try cock

A

MC:

A

33
Q

MC CHAPTER 5:
6.An advantage of using a water column is that it:

A) Allows air to escape when filling the boiler
B) Will indicate the boiler pressure
C) Make water level easier to read
D) Prevents water and steam from escaping if the gauge glass breaks

A

MC:

C

34
Q

MC CHAPTER 5:
7.The blow off connection on a boiler is made:

A) At the lowest permissible water level
B) Just below the safety valve connection
C) At the lowest point of the boiler
D) Just below the feedwater inlet

A

MC:

C

35
Q

MC CHAPTER 6:
1.The scale on the dial of a pressure gauge shall have a maximum graduation of ___________ times the pressure at which the pressure relief valve is set to open.

A) 4.0
B) 3.5
C) 2.5
D) 1.5

A

MC:

B

36
Q

MC CHAPTER 6:
2.Where should the pressure relief valve be installed in a hot water system?

A

MC:

Anywhere reasonably close to the tank

37
Q

MC CHAPTER 6:
3.The wax filled sensor probe in a combination pressure-temperature relief valve will expand and open the valve by means of a piston at approximately.

A) 50° C (122°F)
B) 110°C (230°F)
C) 99°C (210°)
D) 124°C (273°F)

A

MC:

C

38
Q

MC CHAPTER 6:
4.The minimum size of a blow off or drain connection on a hot water heating boiler is.

A) NPS 1/2 (DN15)
B) 25mm OD
C) NPS 3/4 (DN20)
D) 2 inches ID

A

MC:

C

39
Q

MC CHAPTER 6:
5.The automatic fill valve is a/an _______________________ valve, which keeps the system filled with water and maintains a set pressure in the system.

A) Pressure reducing
B) Air vent
C) Back Pressure
D) Pressure control

A

MC:

A

40
Q

MC CHAPTER 7:
1.The _____________ operated low water fuel cut-off uses buoyancy to operate the switch.

A) Float
B) Electrode
C) Bi-metal
D) Thermal

A

MC

A

41
Q

MC CHAPTER 7:
2.The type of low water cut-off that uses the conductivity of the water to operate it is the ___________ type.

A) Float
B) Thermal
C) Three wire
D) Electrode probe

A

MC:

D

42
Q

MC CHAPTER 7:
3.The main cause of heating boiler failure is overheating of the surface due to:

A) High water level
B) Too high a steam pressure
C) Low water level
D) Operator error

A

MC:

C

43
Q

MC CHAPTER 7:
4.A low water fuel cut-off combination pump control will _____________ if the water level reaches a low level, but still above the lowest permissible level.

A) Shut down
B) Start the feedwater pump
C) Close the fuel valve
D) Open the safety valve

A

MC:

B

44
Q

MC CHAPTER 7:
5.Low water levels can develop in hot water boilers due to human error.

A) True
B) False

A

MC:

A

45
Q

MC CHAPTER 7:
6.On a steam boiler, test the low water fuel cut-off while the boiler is operating by:

A) Increasing the steam pressure
B) Blowing down the boiler
C) Opening the drain valve on the float chamber
D) Doing a “pop” test

A

MC:

C

46
Q

MC CHAPTER 7:
7.A three wire (double pole) switch on a LWFCO will shut off the fuel and sound an alarm.

A) True
B) False

A

MC:

A

47
Q

MC CHAPTER 7:
8.At normal boiler steaming rates, a condensate receiver tank should have enough water supply to keep the boiler supplied for ________ minutes.

A) 30
B) 15
C) 45
D)60

A

MC:

A

48
Q

MC CHAPTER 8:
1. The Burner control the continually adjusts the firing rate to maintain the boiler pressure at a constant value is called ___________.

A) ON-OFF
B) High- Low
C) Modulating
D) High limit

A

MC:

C

49
Q

MC CHAPTER 8:
2. The name of the second spring that is used to increased the span between cut- in and cut out is the ____________________ control.

A) Differential
B) High- low
C) Mid spring
D) Set point

A

MC:

A

50
Q

MC CHAPTER 8:
3. The simplest type of burner operating control used on low capacity boilers is the _____________________.

A) Modulating
B) High- Low
C) High Limit
D) ON-OFF

A

MC:

D

51
Q

MC CHAPTER 8:
4. The device used on hot water boilers to maintain the water temperature is the ________________.

A) Immersion bulb
B) Bellows
C) Modulator
D) Aquastat

A

MC:

D

52
Q

MC CHAPTER 8:
5. The name of the switch used to start and stop the boiler is the _____________ switch.

A) Selector
B) Burner
C) Flame control
D) High- Low

A

MC:

B

53
Q

MC CHAPTER 8:
6. If the low air pressure switch is activated it will close the _____________.

A) Damper
B) Main fuel valve
C) Pilot gas valve
D) Feedwater valve

A

MC:

B

54
Q

MC CHAPTER 8:
7. The cut-out pressure setting for a high pressure safety control used to protect a low-pressure steam boiler will be;

A) 103 kPa
B) Lower than the cut-out pressure of the operating control
C) Just below the popping pressure
D) No higher than 200 kPa

A

MC:

C

55
Q
A
56
Q
A

5th Class PWR ENG (1 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions