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Tt > PanGlobal Practice Test > Flashcards

PanGlobal Practice Test Flashcards

1
Q

A type of boiler is constructed with ______ drums.

A

3

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2
Q

The crown sheet of a locomotive boiler was held in place by __________.

A

Radicals Stays

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3
Q

The combustion chamber of the serpentine water tube is located ___________.

A

Below the water tube

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4
Q

On portable locomotive boilers (Railroad Units) there was often a draft inducer located in the ________.

A

Uptake

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5
Q

The top of the boiler in a locomotive boiler was termed the _________

A

Crown sheet

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6
Q

The cylindrical portion of the locomotive boiler that connected the furnace to the smoke box as termed the___________.

A

Barrel

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7
Q

The uptake area of a locomotive boiler was often equipped with a ____________.

A

Damper for combustion control

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8
Q

The D type boiler is connected with ________ drums.

A

2

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9
Q

If the pilot burner fails to ignite, or if the pilot does go on, the gas burner fails to ignite a lockout switch will be energized after a short trial period of __________ from the time of start up.

A

15 to 30 seconds

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10
Q

This scanner is mounted as close to the flame as physically possible without subjecting it to a temperature over __________.

A

100oC (212oF)

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11
Q

At normal boiler steaming rates, a condensate receiver tank should contain a sufficient volume of water equivalent to the water evaporated by the boiler for a maximum period of ________.

A

30 minutes

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12
Q

An Automatic/manual selector switch is provided on a boiler with the following burner control system __________.

A

Modulating fire control

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13
Q

A photoelectric cell reacts to the ______________ emitted by the flame.

A

Ultraviolet rays and infrared rays

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14
Q

Before a steam or hot water boiler can be started by a programming control, all but one of the following conditions must be fulfilled.

A

All manually operated valves in the fuel lines to the pilot and main turned must be closed.

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15
Q

The inspectors test gauge is used to _____________.

A

Confirmed the pressure shown on the boiler pressure gauge

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16
Q

The blowdown tank is/does is ____________.

A

Not require on a low pressure boiler

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17
Q

The maximum operating temperature of a hot water boiler should never exceed

A

121oC (250’F)

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18
Q

Tubes adjacent to soot blowers are examined for signs of______________.

A

EROSION

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19
Q

Thermal shock occurs when metal is subjected to a sidden change in temperature, the temperature change will not be even throughout the metal

A

Expansion and construction will not be equal in all parts of the metal.

20
Q

When a steam boiler has to be taken out of service give it a good blowndown to remove as much sediments as possible stop when the drain runs cleaner. Refill boiler to the top of the glass maintaining the boiler water temperature above___________ for about one hour to release all the dissolved gases.

A

85oC (185oF)

21
Q

Operating temperature below _____________ of a hot water boiler are often avoided to prevent flue gas condensation

A

77oC (170oF)

22
Q

The dye penetrant, entrapped in a crack, is brought to the surface by the action of the ____________.

A

Developer

23
Q

When removing a hot water boiler from service open the blow-off or drain valve on the bottom of the boiler to remove any sediment that may have collected stopping when the ______________.

A

Water runs clear

24
Q

When a cold oil fired boiler is started up the operator may notice that during the firts part of the warm-up period the stock will smoke slightly due to_____________.

A

The furnace temperature not being high enough to vaporize the incoming fuel oil immediately and completely.

25
Q

Natural draft is created by the difference in ___________

A

Densities between cold and air & hot fuel gases.

26
Q

The draft created by the fan can be controlled by the use of ________________.

A

Inlet dampers

27
Q

If the combustion is complete the the SULPHUR will combine with the oxygen to produce ________________ plus heat. If complete - DIOXIDE
Incomplete- MONOXIDE

A

Sulphur Dioxide

28
Q

If the combustion is complete the HYDROGEN will combine with the oxgyen to produce ______________ plus heat.

A

Some left over hydrogen

29
Q

An important factor applicable to automatic fuel valves is positive ___________.

A

Positive shut-off

30
Q

The amount of air in excess of the theoretical air 12kg (26.5lb) is 6kg (13.2lb) express as a percentage of the theoretical air this would be __________.

A

50%

31
Q

The components of coal that combustible are ___________.

A

Carbon, hydrogen and Sulphur

32
Q

An advantage of the forced draft fan over the induced draft fan is that the forced draft fan ____________.

A

Handles lower volumes of gases.

33
Q

The service temperature of REFLECTIVE METAL INSULATION is above ________.

A

1040oC (1904oF)

34
Q

The VALVE GLAND contains the ________

A

Packing

35
Q

One inch of water is equivalent to:

A

0.036 psi (0.25 kPa)

36
Q

If the combustion is incomplete the carbon will combine with oxygen to produce ______plus heat.

A

Carbon monoxide

37
Q

The average heating value of Propane is:

A

93,150kJ/m3 (2,500 Btu/ft3)

38
Q

If the combustion is incomplete the hydrogen will combine with the oxygen to produce ________ plus heat.

A

Some left over hydrogen

39
Q

A chimney is necessary to:

A

To increase the concentration of pollutants

40
Q

Viscosity is a measure of the ________of the oil.

A

Internal resistance flow

41
Q

If the combustion is complete the hydrogen will combine with the oxygen to produce _______plus heat.

A

Water Vapour

42
Q

A U-tube draft gauge is also known as:

A

Manometer

43
Q

The service temperature limit of Glass Fibre insulation is:

A

454C (850F)

44
Q

The service temperature limit of Calcium Silicate insulation is:

A

650C (1200F)

45
Q

The service temperature limit of Mineral Fiber ( Rock and slag Wool) insulation is:

A

1038F (1900F)

Tt (3 decks)

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