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Chief 2 Flashcards

1
Q

Fire actuated fusible plugs on boiler should be renewed at least every 12 months

A

T

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2
Q

Cavitation in a centrifugal pump affects the net positive suction head

A

T

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3
Q

The remote control switch for an oil fired boiler is located on the oil burner motor

A

F

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4
Q

The device which senses primary air failure in a rotary cup oil burner is a vapor stat

A

F

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5
Q

Low pressure steam or an electric heater is required for heating number six fuel oil

A

T

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6
Q

.05 inches of water and positive pressure is considered a food over the fire draft in natural draft furnace

A

F

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7
Q

The carbon monoxide content in the flu gas from an efficiently fired boiler should be approximately 0%

A

T

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8
Q

On electrostatic precipitator is used to remove particles from flue gases

A

T

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9
Q

On arbitrary index combining the effects of temperature humidity and movement in air conditioning is called effective temperature

A

T

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10
Q

When a bird engages used to measure steam pressure a pigtail or siphon is used to prevent condensate from entering the gauge

A

F

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11
Q

A compound gauge is one that measure both air and steam pressure

A

F

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12
Q

it is considered good practice in the care and operation of a steam boiler to use hot water whenever possible in refilling a boiler prior to firing

A

T

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13
Q

Flooding of a boiler could be caused by the formation of scale on the seat of a float operated boiler supply valve

A

T

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14
Q

Suit usually accumulates on the outside surface of the tubes in an HRT boiler

A

F

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15
Q

A dead weight tester is used to calibrate steam gauges

A

T

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16
Q

For the dry removal of Ash created by a pulverized coal system it is best to use a low fusing a****

A

F

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17
Q

After a soot blowing operation the flu gas temperature should be higher

A

F

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18
Q

The greater The Arc of contact about has on a pulley the greater the tendency it has to slip

A

F

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19
Q

A ringleman scale is used to determine the CO2 content of flu gases

A

F

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20
Q

Humidity is removed from the air by heating the air

A

F

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21
Q

The total head of a pump is calculated by adding the suction lift and the suction head

A

F

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22
Q

When the critical velocity of a liquid is reached the liquids flow lines starts to break up

A

T

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23
Q

A whistling noise in the expansion valve of on ammonia system indicates on a sufficient amount of refrigeration in the system

A

T

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24
Q

The fourth pass on a boiler can add up to 80% efficiency

A

T

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25
Q

Azulite water softener exchanges calcium and magnesium for potassium ions

A

F

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26
Q

Hand modulation is used on some oil-fired boilers to stabilize the burner output

A

T

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27
Q

The valve that controls the amount of brine admitted to the cooling coil is called the expansion valve

A

F

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28
Q

776 w is equal to one electrical horsepower

A

F

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29
Q

Packless valves are used extensively in heating installations

A

T

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30
Q

Speed regulation is very poor on a series wound motor

A

T

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31
Q

The most widely accepted test used to determine the viscosity of various grades of fuel oil is the API test

A

F

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32
Q

A scale pocket is mostly found on the lowest end of a header

A

T

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33
Q

Telltale holes are included in calculating those strength of stables

A

T

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34
Q

New York industrial code rule number four defines hot water boiler as being high pressure when it exceeds 160 PSI or exceeding 250° f

A

T

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35
Q

The efficiency of a joint is the ratio of a joint to the solid plate of the shell or drum

A

T

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36
Q

The amount of water required per ton of refrigeration in a water-cooled condenser will vary with the temperature of water and allowable rise through the condenser

A

T

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37
Q

It is possible to operate a steam heating system with a pressure less than atmospheric pressure

A

T

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38
Q

Another name for an alternator is an Exciter

A

T

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39
Q

Magnesium sulfate is the substance that would cause caustic embrittlement in a boiler

A

F

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40
Q

A lamp seemed crack can be repaired by welding

A

F

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41
Q

Flame rods are not recommended for oil-fired boilers

A

T

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42
Q

Air has two principal jobs in connection with the generation of steam

A

T

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43
Q

The external covering of a boiler is called lagging

A

T

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44
Q

The absorbing reagent which is used in an or stat test to absorb CO2 is potassium perogally

A

F

45
Q

The absorbing reagent which is used in on poor stat test to absorb 02 is potassium hydroxy

A

F

46
Q

The absorbing agent which is used in an or stat test to absorb Co is Cuprous chloride

A

T

47
Q

The elastic limit of material is the maximum unit stress that can be developed without causing a permanent set

A

T

48
Q

A pyrometer is an instrument used to check flame temperature

A

T

49
Q

A gallon of number six fuel oil will provide approximately 150,000 BTUs

A

T

50
Q

It is permissible to build cast iron boilers for steam pressure above 15 psi

A

F

51
Q

In a balanced draft furnace the

A

Drafts reading is negative at the furnace inlet

52
Q

The component present in greatest amount by weight and number five fuel oil is

A

Carbon

53
Q

The most highly toxic of the following refrigerants is

A

Sulfur dioxide

54
Q

A major cause of air pollution resulting from the burning of fuel oils is

A

Sulfur dioxide

55
Q

An induced draft fan is connected between the

A

Stack and the breaching

56
Q

A manometer is an instrument that is used to measure

A

Air pressure

57
Q

If the temperature of the condensate returning to the vacuum pump in a low pressure steam vacuum heating system is over 180° f the trouble may be caused by

A

Faulty radiator traps

58
Q

In a period of 20 minutes which one of the following is equal to a ton of refrigeration

A

4000 BTUs

59
Q

Which of the following is not on the low side of a refrigeration system

A

Liquid seal

60
Q

When the temperature of water that is to be pumped rises from 150° f to 200° f the suction lift of the pump will

A

Decrease

61
Q

Want a duplex system pump dimension is given as 3x2x3 the third figure usually refers to the

A

Length of the stroke

62
Q

Of 115 volt hot water heater has a resistance of 5.75 ohms the current it will take at rated voltage is

A

20 amps

63
Q

When it is necessary to add chemicals to a heating boiler it should be done

A

At a time when there is heavy flow of condensate to the boiler

64
Q

What attempting to determine the proper size for a boiler feed pump it is advisable to obtain one capable of delivering

A

One cubic foot of water for every horsepower hour

65
Q

When a hydrometer made of wood or hair is made to operate a relay to automatically control humidity it is called a

A

Hygrostate

66
Q

On ideal turn ratio for an oil burner on a fire tube boiler is

A

4-1

67
Q

On open feed water heater is located

A

Ahead of the feed pump

68
Q

A megometer is used to check

A

Insulation on electric wires

69
Q

If a Fahrenheit thermometer registered 100° f what would be the reading on the Celsius scale

A

37.7 C

70
Q

Which one of the following refrigerants is used most often in home air conditioners

A

C h c l f 2

71
Q

What determines the refrigerating capacity of a NH3 compressor

A

The cylinder size

72
Q

Specific gravity can be measure by use of a

A

Hydro meter

73
Q

Modern electric motors are considerably smaller than older boaters of the same horsepower because of the use of

A

Thinner insulation

74
Q

The slope in a brick set HRT boiler is usually

A

1 to 3 inches

75
Q

ETR equivalent direct radiation is defined as the exchange of____BTUs cubic feet of radiation per hour

A

240

76
Q

If a boiler was being repaired with a laptop patch the patch should overlap the patched area by at least

A

1/2 in

77
Q

The blowdown ring on a safety valve is used to

A

Govern the amount of steam exhausted

78
Q

The specific heat of ice is

A

.5

79
Q

The fuel oil pressure in a mechanical atomizing burner varies from

A

100 to 200 PSI

80
Q

Approximately how many feet would a boiler tube be if it measured three meters long

A

9.85

Because 1 meter =39.1 inches

81
Q

A heavy starting torque diminishing as the motor comes up to speed is a characteristic of a

A

Capacitor start motor

82
Q

Only two gauge cocks are required on

A

Boiler’s not over 36 in in diameter

83
Q

Which is the following is not a factor which governs the size of a safety valve for boiler

A

Spring tension

84
Q

An elliptical manhole opening in a water to boiler shall not be less than

A

160 square inches

85
Q

The largest size safety valve would have a diameter of

A

5 in

86
Q

Ammonia system condenser tubes are usually constructed of

A

Steel

87
Q

The location of the New York state standard stamp on a hr2 boiler is always found on

A

The front head of the tubes

88
Q

The corrosive action of the flu gases in an oil-fired boiler would be more noticeable if the flu gas temperature was

A

Decreased

89
Q

One of the most popular types of wet back boilers is a

A

Scotch Marine

90
Q

Which of the following boiler accessories has the highest efficiency rating

A

Economizer

91
Q

Permanently hard water contains

A

Calcium sulfate

92
Q

When a steam radiator in a one pipe gravity system is air bound the cause is most likely to be

A

Defective air valve

93
Q

The electric circuit to a 10 kilowatt hot water heater which is automatically controlled by an aqua step will also require a

A

Magnetic contactor

94
Q

Want to fire to boiler cannot be taken out of service for any great length of time to permanently repair an interior tube leak the boiler inspector may allow

A

The use of a tube stopper

95
Q

If cavitation appears in a pump it will most likely attack the

A

Impeller

96
Q

A globe valve is best suited for

A

Volume control

97
Q

A flame sensing device that uses flame rectification for proving burner light off is

A

Flame rod

98
Q

The same saybolt is associated with the measurement of

A

Viscosity

99
Q

Welded joints on boilers are tested by_________to ensure uniform strength

A

Hydrostatic test or x-ray

100
Q

Bucket traps are two types_______or______

A

Inverted or upright

101
Q

The soap destroying property in water is best described as

A

Hardness

102
Q

The first requirement of a trap is that it allowed the passage of______and prevents the pressure of_______

A

The first requirement of a trap is that it allow the passage of water and prevents the pressure of steam

103
Q

There are____cubic inches in a gallon

A

231

104
Q

The maximum unit of stress that can be applied to a material without causing a permanent set is called

A

Elastic limit

105
Q

A gallon of number six fuel oil will provide approximately

A

150,000 BTUs

106
Q

The deep guttering or lions or pits in piping caused by dissolved gases is called

A

Grooving

107
Q

The test used to determine the amount of dissolved oxygen in boiler water is the_____test

A

Winkler

108
Q

A_______is used to measure very high temperature

A

Pyrometer

Chief 1 (7 decks)

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