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問題一覧
1
How are tube sheets supported in a fire tube boiler?
by the shell, stays, in tubes
2
In a fire tube boiler, how are the tubes usually attached to the tube sheet?
by rolling the tubes and beading the ends
3
Where would you find downcomer tubes?
in water tube boilers
4
Why are baffles used in the steam drums of water tube boilers?
to prevent the carryover of water
5
Why are stay bolts used in the construction of HRT power boilers?
to strengthen and support flat plates on a fire tube boiler
6
According to the codes and standards adopted and incorporated by references of the boiler pressure vessel and refrigeration regulation, welded repairs in any alterations made to the boilers must comply with what?
Department of Labor, The Bureau of Boiler and Pressure vessel compliance
7
According to the law, how often must all steam or hot water boilers shall be inspected in the state of New Jersey?
Once every year at 12 months intervals from previous inspection.
8
According to the regulation, a license operator on watch shall give constant attention and remain within sight and natural sound in both HP and LP boilers
False
9
The examining board of the mechanical inspection Bureau of Boiler and pressure vessel compliance may consider an applicant experience of an equivalent amount for grade or classification from some other jurisdiction authority ( state or federal ).
True
10
The maintenance of automatic direct fire boilers is covered under what document?
ASME CSD-1
11
The mechanical inspection Bureau incorporates by reference various codes, standards and practices. Once specific safety practice incorporated by reference for licensed operators specifies and identifies one called a qualify individual. How is the qualified individual identified in this reference?
A boiler service technician who is engaged in and responsible for the installation, replacement, repair or service of the boiler, fuel burning controls, and safety devices and is experienced in such work. And some states this individual must also hold an appropriate boiler operators license
12
The various license classifications in grades for operating high pressure boilers are found every day NJAC reference section listed as:
Table 3.4
13
To be eligible for HP Boiler operator in charge examination, what is the duration of time indicated in the regulations that an applicant must have for an extensive training program established by the chief engineer and approved by the Bureau of Boiler pressure vessel compliance?
for a period of no less than 6 weeks
14
What ASME code symbol is used to denote a high pressure power boiler?
S
15
What is the act ( law) That establishes the licensing requirements in the state of New Jersey for stationary, power engineers, refrigeration engineers, and boiler operators?
N.J.S.A. 34:7-1
16
What is the max penalty that may be imposed for performing the duties of a license operator with an expired license?
$5,000
17
What is the penalty if a person taking exam is found taking photos of the test?
Any person using fraudulent means to obtain a license shall be subject to prosecution and or penalty up to $5,000. any license shall be invalid
18
What is the range of capacity that a high pressure boiler operator can be the chief engineer and work as shift engineer (stand watch) based on the 12:90 boiler, pressure vessel and refrigeration rules?
can act as chief engineer and stand watch of a plant with a minimum capacity at 100 HP and up to 500 HP.
19
What is the regulation corresponding to boiler, pressure vessels, and refrigeration systems in New Jersey?
New Jersey administrative code ( NJAC) 12:90
20
Any person found performing the duties of a license and holding and expired license shall be scheduled to what type of penalty?
they shall be subject to a minimum penalty of $500 up to a max of $5,000 per day.
21
Air receivers must conform to what ASME code?
Section VIII
22
If your boiler needs welded repairs, you must get approval for such repairs from the:
authorized inspection agency
23
In accordance with ASME CSD-1, where is the installation of a manually operated remote shutdown switch or circuit breaker to be located?
Just outside the boiler Room door, unless the door is on the building exterior and it must be marked for easy identification and installed on every exit door of the boiler room.
24
Pursuant to N.J.A.C. 12:90, What is the temperature and pressure that defines a high temperature hot water heating boiler?
exceeds 250° F at 160 psi
25
Is it necessary to provide a disconnect switch at an accessible location at the boiler?
an electrical disconnect switch shall be installed at the boiler at an accessible location with a cover plate that can be locked out in the open position.
26
When a license is improperly or not posted what is the amount of penalty or fine that may be imposed on the engineer, by the state?
$500.00
27
When preparing a boiler for a hydrostatic test, what is the best temperature for the boiler water?
75° F
28
Where in the NJ administrative code (NJAC) are the duties of license persons established?
N.J.A.C. 12:90 - 3.10
29
Which is the act that a mechanical inspection Bureau exist in New Jersey?
The New Jersey Statue Annotated (NJSA) 34:1 -38.1
30
Who is responsible for obtaining pertinent operating, testing, servicing, and cleaning instructions for the controls and safety devices?
It is the responsibility of the installing contractor to deliver all the instructions to the equipment owner/user.
31
By ASME code, the size of the water column connections to a boiler must be a minimum of
1 inch
32
What is the proper procedure for returning a gauge glass to service after installing a new glass?
Open the drain and crack open the top valve
33
When a low water fuel cut off (LWFCO) has activated on a hot water heating boiler what shall happen?
operation of the LWFCO shall cause a safety shutdown and lockout, requiring a physical manual reset
34
What would occur if there was a drop in the viscosity of the liquid flowing through a heat exchanger?
The temperature of the liquid would increase
35
Which of the following could cause a tube in a high temperature hot water boiler to overheat?
poor circulation
36
Which of the following is the proper method for testing a low-water cutoff device on a steam boiler?
lower the water level in the boiler until the burner shuts down
37
An operator must be familiar with how water pressure works and the basic concepts that determine pressure head. Therefore, a column of water 1-inch square and 1 - foot - high weighs how much?
.43 lbs
38
Which of the following valves is used in a steam feed water supply line to control the direction of fluid flow and prevent backflow in a system?
check valve
39
Most steam boilers are equipped for the gauge glass and water column to be blown down. Generally, the operating rules recommend that the water column engaged glass be blown down..
once a day
40
What is the basic function of the low water cutoff device?
to shut off the fuel supply to the burner
41
A three-element feed water regulator is controlled by what means?
steam flow, feed water flow, and drum level
42
A two-element feed water regulator is controlled by what means?
water level and steam flow rate
43
What condition would cause a feed water pump to become vapor bound?
The feedwater temperature is too hot
44
What device is used on a deaerator to prevent water from backing up into the steam line?
an overflow device
45
What is the function of a vent condenser on a deaerating feed water heater?
to condense steam that would escape through the vent
46
What is the pressure at radiator 1
10.28 psig
47
What is the pressure at the center line of the pump?
13.72 psig
48
A two-element feed water control device responds to the boiler drum level and feed water flow.
False
49
On a boiler feed water line, what type of valve is used closest to the boiler
a stop valves
50
In your boiler plant you have pumps that are used for numerous applications. One of the pumps has a small amount of liquid coming from the packing gland. Is this normal or is it a problem?
This is normal and is necessary to lubricate and cool the packing.
51
A thermal expansion feed water regulator operates by:
the expansion and contraction of a thermostatic element
52
What would one standard atmosphere at 14.7 psi be equivalent to in feet of water?
34 feet
53
Which statement best describes the operation of a closed feed water heater?
the steam and water do not mix
54
While making a round of your boiler room, the boiler feed water pump is making a strange noise. The pump casing and the temperature of the water has risen above normal. What would most likely cause this problem?
pump cavitation issue
55
When taking over a shift, the boiler operator must first check:
water level on all boilers online by blowing down the water column in gauge glass
56
What chemical should be added to boiler feed water to prevent oxidation of the boiler drum in tubes?
sodium sulfite
57
What water treatment chemical is used to control alkalinity in boiler feed water?
caustic soda
58
Where is caustic and brittlement most likely to occur?
on a riveted joint below the water line
59
On a pH scale what number would represent the most acidic of a solution of feed water?
The most acidic would be 0
60
In a boiler plant system, what is the measure of the degree of acid or base of a solution called?
This would be called pH level
61
What should new or re-tubed boilers be cleaned with?
an alkaline detergent solution
62
Which of the following would cause scale to form on a low pressure boiler?
calcium and magnesium
63
A solids and alkalinity in boiler water increases:
waterside scaling is increased
64
What chemical would be used to control scale in a low-pressure boiler?
phosphate
65
What will excessive oxygen in the boiler water cause to take place?
pitting of boiler metal
66
By N.J.A.C. 12:90 rules, What is the minimum thickness allowed for atmospheric type blowdown tank?
5/16 inch
67
In the state of New Jersey, when it is permissible to have only one bottom blow off valve on a boiler?
when the MAWP does not exceed 100 PSI
68
N.J.A.C. 12:90 requires that sewer lines be protected from high temperatures and pressure coming from boiler blow-off lines. What device is used for this purpose
a blow down tank
69
What effect would frequent blowing down of a boiler have on the system?
blow down heat loss
70
The maximum size of the bottom blowdown line and the surface blow down line is:
2.5"
71
As the firing rate increases in a boiler equipped with a convection type superheater, the steam temperature:
increases
72
Before a hydrostatic test is performed on a boiler, each safety valve should be:
held to its seat by means of a testing clamp
73
What boiler should never be subjected to an accumulation test?
a boiler equipped with a superheater
74
What is the difference between the set- point pressure at which a safety valve opens and the pressure at which this valve closed called?
blowdown
75
What is the function of a dry pipe in a boiler?
to remove moisture from the steam drum
76
What part of the safety valve is used to ensure the valve seats properly?
the guides and bushings
77
A safety valve data nameplate suggests that the orifice opening on the valve is 1.5 in w/a set pressure of 98 PSIG. What's the total force acting on the valve?
173 lbs
78
If a boiler has an operating pressure of 345 psi and a 2 and 1/2-in diameter safety valve, what is a total force acting on the safety valve?
1693.5 lbs
79
If one atmosphere is about 14.7 PSIA, what is the standard barometer reading at sea level equal to?
760mm. Hg
80
If steam were reduced by a PRV from 500 PSI to 125 psi, the steam at 125 psi would have:
the same heat as at 500 PSI
81
In steam piping, which type of steam trap has no moving parts?
the continuous flow type
82
On a steam boiler in order to prevent the generation of steam greater than the maximum working pressure requires activation of what device?
the high steam pressure limit control
83
The ASME code requires more than one safety valve on a boiler, when the boiler has:
over 500 ft² of heating surface
84
In what units of measurement are vaporstat type pressure switches calibrated in?
inches of water
85
The steam pressure on a safety valve act upon upper side of the valve disc, which is held down upon the seat by a spring that pushes down.
false
86
Steam at 100 psi and 400° F would be considered:
superheated steam
87
How often should the safety valves on a power boiler be test blown?
at least once a month
88
A boiler with an MAWP of 150 psi and the safety valve setting of 100 psi with a 3" valve disc - What would be the total force needed to open the safety valve against opposing spring force?
707 lbs
89
What is the purpose of a siphon on a steam pressure gauge?
to protect the gauge from high steam pressure
90
Water hammer (or other fluid hammer) is a dangerous condition that could result in:
lead to total failure of the piping hangers and support structures
91
A boiler produces 500 psi steam at 625° F, normal saturated steam condition is 467° F, what is the degree of superheat?
158° F
92
A "water hammer" condition in a steam plant is dangerous because it can
lead to steam pipe failure
93
Which of the following best defines saturated steam?
steam at a temperature corresponding with its pressure
94
Which of the following is not an advantage of steam heating system?
only small pumps are needed to move steam
95
What is the function of the thrust bearing on a steam turbine?
to maintain the radio position of the rotor
96
What is the horsepower rating of a 10, 000-kW steam turbine?
13,400 HP
97
What is the theoretical cycle of a simple power plant?
Rankine cycle
98
What is the stationary passage of an impulse turbine called?
nozzle
99
What prevents superheater tubes from warping or burning out?
by keeping a continuous flow of steam through the superheater tubes
100
What type of turbine allows for the reclaiming of condensate for use in the system?
a condensing turbine