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Book 1 PanGlobal Assessment Test Unit One: Boiler Details (5th Class Power Engr) > FINAL - Book 1 Review Comprehensive Self-Assessment > Flashcards

FINAL - Book 1 Review Comprehensive Self-Assessment Flashcards

1
Q
  1. The low water level fuel cut-off will shut off the fuel to the heating boiler when the water level drops below:

A. One half of the gauge glass

B. 50 mm (2 in.) above the bottom of the gauge glass

C. The lowest permissible water level

D. 25 mm (1 in.) above the bottom of the gauge glass

E. The lowest visible part of the gauge glass

A

C. The lowest ‘‘permissible’’ water level

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2
Q
  1. The actuator may be _____ operated.

A. Pneumatically

B. Hydraulically

C. Electrically

D. All of the above

E. None of the above

A

E. None of the above

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3
Q
  1. The purpose of the ‘‘steam trap’’ is to discharge water and condensate from steam lines and equipment ‘‘without’’:

A. Letting air escape

B. Permitting steam to escape

C. Letting air enter

D. Permitting steam to enter

E. Permitting corrosion

A

B. Permitting steam to escape

Note: purpose of the ‘‘steam trap’‘without permitting

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4
Q
  1. The HRT boiler is classified as a _____ pass boiler.

A. One

B. Two

C. Three

D. Four

E. Multi

A

B. Two (Pass Boiler)

HRT boiler

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5
Q
  1. The slip expansion joint requires _____ than the expansion bend.

A. More space

B. Lower temperatures

C. Higher temperatures

D. Less space

E. Higher pressures

A

D. Less space

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6
Q
  1. The oil temperature is controlled by the:

A. Temperature required by the process

B. Pressure required by the process

C. Volume of material produced

D. Process requirements

E. Firing rate in the furnace

A

E. Firing rate in the furnace

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7
Q
  1. When the pressure inside the Bourdon tube increases the tube will tend to:

A. Become more oval showing higher pressure

B. Straighten showing lower pressure

C. Curve more showing higher pressure

D. Curve more showing lower pressure

E. Straighten showing higher pressure

A

E. Straighten showing higher pressure

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8
Q
  1. In a building heating system the condensate in the condensate receiver tank comes from the:

A. Boiler feedwater

B. Economizer

C. Heating system

D. Make-up water supply

E. Deaerator

A

C. Heating system

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9
Q
  1. The non-return stop valve is also referred to as a _____ valve.

A. Stop and check

B. Stop and gate

C. Gate and check

D. Ball and stop

E. Globe and stop

A

A. Stop and check

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10
Q
  1. When the control relay starts the burner motor on demand for heat, it allows a purging cycle of _____ seconds then it energizes the igniter.

A. 15-20

B. 5-10

C. 5-15

D. 0-5

E. 10-15

A

E. 10-15 seconds

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11
Q
  1. If the steam passage to the boiler gauge glass ‘‘becomes obstructed’’:

A. The water level in the glass will rise

B. The water level in the glass will fall

C. The steam level in the glass will rise

D. The steam level in the glass will fall

E. There will be no change

A

A. The water level in the glass will rise

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12
Q
  1. Steam heating boilers ‘‘with little or no make-up water’’ should only require once a _____ blowdown.

A. Week

B. Month

C. Day

D. Shift

E. Hour

A

A. Week

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13
Q
  1. An advantage of the forced draft fan over the induced draft fan is that the forced draft fan:

A. Handles the fuel fed to the burner

B. Handles hot air only

C. Endures higher temperatures

D. Requires more expensive materials

E. Handles lower volumes of gases

A

E. Handles lower volumes of gases

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14
Q
  1. The highest oil level in the tank should be less than _____ above the burner.

A. 3.4 m (11.2 ft)

B. 7.6 m (24.9 ft)

C. 8.9 m (29.2 ft)

D. 12.6 m (41.3 ft)

E. 2.4 m (7.9 ft)

A

B. 7.6 m (24.9 ft)

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15
Q
  1. One of the characteristics of a firetube boiler is:

A. Their large water capacity makes them slow in coming up to operating pressure

B. Their large water capacity makes them fast in coming up to operating pressure

C. Their small water capacity makes them fast in coming up to operating pressure

D. Their small water capacity makes them slow in coming up to operating pressure

E. The small amount of heat stored in the water makes it possible to meet load changes quickly

A

A. Their large water capacity makes them slow in coming up to operating pressure

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16
Q
  1. Overheated oil will break down forming a solid mass of carbon called:

A. Coal

B. Carbon

C. Graphite

D. Coke

E. Steel

A

E. Steel

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17
Q
  1. The advantages of ‘‘bent tube boilers’’ include:
  2. Bent tubes allowed for better heat transfer
  3. Much refractory was eliminated
  4. Limitations on design and configuration
  5. The tubes could form flue gas baffles

A. 1, 2

B. 2, 3, 4

C. 3, 4

D. 1, 2, 3, 4

E. 1, 2, 4

A

E. 1, 2, 4

  1. Bent tubes allowed for better heat transfer
  2. Much refractory was eliminated
  3. The tubes could form flue gas baffles
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18
Q
  1. Black light is the popular name for invisible light in the near _____ range of wave lengths.

A. Ultrasonic

B. Green light

C. Infrared

D. Violet light

E. Ultraviolet

A

E. Ultraviolet

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19
Q
  1. The High-Low fire control method requires two pressure controllers, one is called the high-low fire control and the other is called the:

A. Modulating fire control

B. On-Off fire control

C. High limit fire control

D. Operating limit pressure control

E. Operating limit fire control

A

D. Operating limit pressure control

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20
Q
  1. The minimum size of the hot water heating boiler bottom blow off or drain connection shall be:

A. 6 mm (¼ in.)

B. 15 mm (½ in.)

C. 19 mm (¾ in.)

D. 25 mm (1 in.)

E. 75 mm (3 in

A

C. 19 mm (¾ in.)

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21
Q
  1. A machined and slightly ‘‘tapered piece of pipe’’ found in cast-iron sectional heating boilers is referred to as a:

A. Tie rod

B. Tapered bushing

C. Push nipple

D. Pipe nipple

E. Tie bolt

A

C. Push nipple

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22
Q
  1. The maximum operating temperature for a butterfly valve is _____.

A. 500°C (932°F)

B. 1200°C (2190°F)

C. 1100°C (2012°F)

D. 1500°C (2730°F)

E. 1000°C (1832°F)

A

C. 1100°C (2012°F)

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23
Q
  1. On larger boilers both forced draft and induced draft fans are used for better control of:

A. Furnace pressure

B. Combustion air

C. Flue gases

D. Air volumes

E. Fuel volumes

A

A. Furnace pressure

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24
Q
  1. The check valve is a valve which prevents _____ in piping.

A. High pressure

B. Low pressure

C. High flow

D. Low flow

E. Reversal of flow

A

E. Reversal of flow

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25
Q
  1. The forced draft fan is used to force:

A. Combustion air into the stack

B. Combustion produces into the stack

C. Flue gases into the furnace

D. Flue gases into the stack

E. Combustion air into the furnace

A

E. Combustion air into the furnace

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26
Q
  1. The flash point is the _____ at which the fuel oil gives off enough vapour to ignite when exposed to an open flame but not continue to burn.

A. Highest temperature

B. Lowest Pressure

C. Lowest temperature

D. Highest pressure

E. Auto ignition temperature

A

C. Lowest temperature

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27
Q
  1. The pump type motorized gas valve uses a hydraulic oil pump to:

A. Close the gas valve quickly

B. Close the gas valve slowly

C. Open the gas valve slowly

D. Open the gas valve quickly

E. Lubricate the gas valve

A

C. Open the gas valve slowly

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28
Q
  1. The voltage supply generated by the thermocouple is usually not more than:

A. 50 millivolts

B. 15 millivolts

C. 0 millivolts

D. 100 millivolts

E. 30 millivolts

A

E. 30 millivolts

29
Q
  1. An advantage of natural gas as a boiler fuel is:

A. More ash is produced when gas is burned

B. Little handling equipment is required

C. The amount fed to the furnace is difficult to control

D. It is difficult to mix with air

E. A large storage space is required

A

B. Little handling equipment is required

30
Q
  1. Flame failure may occur during operation due to:

A. Overly high gas pressure

B. Air in the fuel

C. Excessively high fuel pressure

D. High boiler load

E. Insufficient fuel oil supply due to a plugged filter

A

E. Insufficient fuel oil supply due to a plugged filter

31
Q
  1. The grooved pipe system uses a joining connection made with a/an _____ that also serves as a union between the fitting and the piping.

A. Coupling collar

B. Elbow

C. Flange fitting

D. Quick couple

E. Adaptor

A

A. Coupling collar

32
Q
  1. Solenoid valves used on gas and oil-fired boilers are what type of valve?

A. Gate

B. Globe

C. Needle

D. Ball

E. Plug

A

B. Globe

33
Q
  1. A major advantage of the Locomotive boiler was the:

A. Use of longitudinal stays

B. Absence of brickwork, refractory or setting

C. Size of the smoke box

D. Use of a draft inducer

E. Internal furnace

A

B. Absence of brickwork, refractory or setting

34
Q
  1. All valves must be properly identified with one of the markings indicating the:

A. Mass of the valve

B. Material designation

C. Size of the valve

D. Type of packing used

E. Type of valve

A

B. Material designation

35
Q
  1. The refractory brick of the hot oil heater should be inspected for:

A. Consistency

B. Abnormal cracks

C. Hardness

D. Colour

E. Density

A

B. Abnormal cracks

36
Q
  1. One of the general classes of gas burner is the _____ burner.

A. Premix

B. Atmospheric

C. Ring

D. Spud

E. Power

A

A. Premix

37
Q
  1. Secondary Air (SA) is:

A. The air used to create a “shearing” action on the fuel within the burner

B. Also called combustion air

C. The second air to contact the fuel when primary air is involved

D. Also called flue gas

E. Also called tertiary air

A

C. The ‘‘second air’’ to contact the fuel when primary air is involved
Note: Secondary THEREFORE ITS SECOND

38
Q
  1. One mm of water is equivalent to:

A. 9.81 Pa (0.0014 psi)

B. 9.81 kPa (14.2 psi)

C. 101.3 kPa (14.7 psi)

D. 1 kPa (0.145 psi)

E. 1 Pa (0.00014 psi)

A

B. 9.81 kPa (14.2 psi)

39
Q
  1. The inclined draft gauge is highly accurate for the measurement of:

A. Small temperature changes

B. Large temperature changes

C. Large pressure fluctuations

D. Slight pressure fluctuations

E. Slight density variations

A

D. Slight pressure fluctuations

40
Q
  1. The ‘‘Steel plate heating boiler’’ is classified as a _____ pass boiler.

A. One

B. Two

C. Three

D. Four

E. Multi

A

A. One

41
Q
  1. Clean steam is steam that is generated from _____ as its feed water.

A. Water containing oxygen scavengers

B. Water corrosion control chemicals

C. Condensate

D. De-ionized or distilled water

E. Water anti-scaling compounds

A

D. De-ionized or distilled water

42
Q
  1. The valve stem connects the:

A. Wheel to the bonnet

B. Yoke to the wheel

C. Disc to the yoke

D. Wheel to the disc

E. Bonnet to the body

A

D. Wheel to the disc

43
Q
  1. Before a new boiler may be started up it must have:

A. A valid inspection certificate

B. An inspection by the manufacturer

C. The permission of the Plant Chief Engineer

D. An inspection by the Fire Commissioner

E. The permission of the union

A

A. A valid inspection certificate

44
Q
  1. The forerunner of the modern packaged firetube boiler was the _____ boiler.

A. HRT

B. Scotch Marine

C. Locomotive

D. Firebox

E. Water box

A

B. Scotch Marine

45
Q
  1. A gaseous fuel used in a boilers could be:

A. Coal

B. Fuel oils

C. Natural gas

D. Wood

E. Diesel fue

A

C. Natural gas

46
Q
  1. Before feedwater enters a boiler the feedwater pipe must be fitted with a:

A. Gate valve between the check valve and the boiler

B. Stop valve between the check valve and the boiler

C. Globe valve between the check valve and the boiler

D. Ball valve between the check valve and the boiler

E. Check valve between the stop valve and the boiler

A

B. Stop valve between the check valve and the boiler

47
Q
  1. The best method of determining that adequate attention is being given to the boiler and its control equipment is to:

A. Keep a personal daily diary

B. Make notes on scrap paper

C. Tell the plant Chief Engineer all the problems

D. Provide a boiler log

E. Have the office secretary keep records

A

D. Provide a boiler log

48
Q
  1. The inner walls and floor are lined with:

A. Insulation

B. Steel sheets

C. Finned tubes

D. Plain tubes

E. Refractory brick

A

E. Refractory brick

49
Q
  1. The incomplete combustion of carbon results in the formation of:

A. Carbon tetrachloride

B. Bicarbonate

C. Carbon dioxide

D. Carbon trioxide

E. Carbon monoxide

A

E. Carbon monoxide

50
Q
  1. If the ‘‘pressure of the gas’’ supplied to the burner ‘‘drops below’’ a minimum value the _____ switch will de-energize the fuel valve.

A. Low gas pressure

B. High gas pressure

C. Low water level

D. Low air pressure

E. High limit

A

A. Low gas pressure

ris ipsa loquitor

51
Q
  1. Hot oil may coke in the heater tubes if:

A. Stack temperature gets too high

B. Oil temperature exceeds 350°C (662°F)

C. A tube should develop a leak

D. Furnace temperature drops too low

E. Oil flow rate is too high

A

B. Oil temperature exceeds 350°C (662°F)

52
Q
  1. Portable lamps of _____ or less, with current supplied from transformers or batteries, should be provided to eliminate the danger of electrocution to personnel inside the boiler.

A. 1.5 V

B. 12 V

C. 24 V

D. 32 V

E. 110 V

A

C. 24 V

53
Q
  1. Three of the four distinct methods of burner operation control for a steam boiler are:
  2. On-Off control
  3. Damping control
  4. Modulating control
  5. High Limit control
  6. Multiple burner control

A. 1, 2, 3

B. 2, 3, 4

C. 3, 4, 5

D. 2, 3, 5

E. 1, 3, 4

A

E. 1, 3, 4

  1. On-Off control
  2. Modulating control
  3. High Limit control
54
Q
  1. All valves must be properly identified with one of the markings indicating the:

A. Mass of the valve

B. Material designation

C. Size of the valve

D. Type of packing used

E. Type of valve

A

B. Material designation

55
Q
  1. When the heating plant has two or more boilers supplying steam to a common steam supply header and one or more boilers are already in operation the _____ during the warm-up period.

A. Steam stop valve of the boiler that is being started up must be kept open

B. Feedwater valve of the boiler that is being started up must be kept closed

C. Steam vent valve of the boiler that is being started up must be kept open

D. Steam stop valve of the boiler that is being started up must be kept closed

E. Feedwater stop valve of the boiler that is being started up must be kept open

A

D. Steam stop valve of the boiler that is being started up must be kept closed

56
Q
  1. Oils intended for use as heat transfer fluid in a hot oil system should:

A. Possess low heat transfer characteristics

B. Resist thermal breakdown at low operating temperatures

C. Have a low vapour pressure at operating temperature

D. Have a high viscosity

E. Be corrosive to metals used in the system

A

C. Have a ‘‘low vapour pressure’’ at operating temperature

57
Q
  1. An ‘‘important factor’’ applicable to ‘‘automatic fuel valves’’ is:

A. Negative shutoff

B. Fast opening

C. Slow closing

D. Positive shutoff

E. Positive opening

A

D. Positive shutoff

58
Q
  1. The float operated low water fuel cut-off works on the principle of:

A. Differential pressure

B. Buoyancy

C. Temperature change

D. Drum level variation

E. Steam density

A

B. Buoyancy

59
Q
  1. All valves must be properly identified with one of the markings indicating the:

A. Service designation

B. Mass of the valve

C. Size of the valve

D. Type of packing used

E. Type of valve

A

A. Service designation

60
Q
  1. The component of natural gas that occupies 80%-90% is:

A. Methane

B. Ethane

C. Propane

D. Butane

E. Hydrogen sulphide

A

A. Methane

61
Q
  1. This scanner is mounted as close to the flame as physically possible without subjecting it to a temperature over:

A. 100°C (212°F)

B. 75°C (167°F)

C. 150°C (302°F)

D. 120°C (248°F)

E. 50°C (98°F)

A

A. 100°C (212°F)

62
Q
  1. One of the characteristics of a firetube boiler is:

A. Their large water capacity makes them slow in coming up to operating pressure

B. Their large water capacity makes them fast in coming up to operating pressure

C. Their small water capacity makes them fast in coming up to operating pressure

D. Their small water capacity makes them slow in coming up to operating pressure

E. The small amount of heat stored in the water makes it possible to meet load changes quickly

A

A. Their ‘‘large water’’ capacity ‘‘MAKES THEM SLOW’’ in coming up to operating pressure

63
Q
  1. The ball float trap has the disadvantage of being vulnerable to damage from:

A. Water hammer

B. High steam pressure

C. High steam temperature

D. Air

E. High condensate temperature

A

A. Water hammer

64
Q
  1. Some of the reasons why heating boiler accidents occur are:

A. The misconception that no supervision is required for automatically-fired boilers

B. The inexperience or lack of training of operating personnel

C. Inadequate maintenance of boilers and controls

D. Failure to test the low water fuel cutoff

E. All of the above

A

E. All of the above

65
Q
  1. If the combustion is complete the ‘‘sulphur’’ will ‘‘combine’’ with the ‘‘oxygen’’ to produce _____ plus heat.

A. Carbon monoxide

B. Carbon dioxide

C. Sulphur dioxide

D. Sulphur monoxide

E. Water vapour

A

C. Sulphur dioxide

Take Note:Sulphur

66
Q
  1. Boiler explosions may be listed under two general classifications:
  2. Furnace explosions
  3. Smelt water explosions
  4. Fuel explosions
  5. Pressure explosions

A. 1, 2

B. 1, 3

C. 2, 3

D. 1, 4

E. 2, 4

A

D. 1, 4

  1. Furnace explosions
  2. Pressure explosions
67
Q
  1. Boiler fittings are:

A. Devices directly attached to the pressure part of a boiler

B. Devices directly attached to any part of a boiler

C. Valves and instruments in the boiler plant

D. All pipe fittings used with boiler operation

E. Devices used for the safe operation of boiler plants

A

A. Devices directly ‘‘attached to the pressure’’ part of a boiler

68
Q
  1. Cast-iron boiler sections maximize heat transfer by:

A. Using four push nipples per section

B. Vertical firing

C. Exposing as large a surface as possible to the hot gases

D. Utilizing an external furnace

E. Using a large economizer

A

C. “Exposing” as large a surface as “possible to the hot gases”

Book 1 PanGlobal Assessment Test Unit One: Boiler Details (5th Class Power Engr) (24 decks)

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