問題一覧
1
What valve is the most important valve on a hot water boiler?
Relief Valve
2
what does LWCO stand for?
Low water cutoff control
3
Which type of heat causes a change of state (water to steam or steam to water)?
Latent heat
4
Which type of heat causes a change in temperature?
Sensible heat
5
What control is used on hot water boilers to maintain temperature?
Aquastat
6
Who rates relief valves and safety valves?
American Society of Mechanical Engineers
7
What type of blow-down will remove sediment from the bottom of the boiler?
Bottom blowdown
8
What is the function of the trycocks on a low water cutoff control?
Check the boiler water level
9
Which license requires that a person be 18 years of age and be competent?
Special Engineer
10
What must be installed on a steam boiler between the boiler and the steam gauge?
Isolation valve and siphon tube
11
what temperature will water boil at when it is at atmospheric pressure?
212 F
12
Heat always travels from hot to cold
True
13
Which statement describes the definition of a BTU
Amount of heat needed to raise 1 lbs of water 1 F
14
Which three terms are used to describe combustion?
Perfect, Complete or Incomplete
15
What does MAWP stand for?
Maximum Allowable Working Pressure
16
Who rates relief valves and safety valves?
American Society of Mechanical Engineers
17
A low-pressure boiler has a MAWP of no more than __ psi?
15 psi
18
A high-pressure boiler has a MAWP more than __ psi?
15 psi
19
Describe a water tube boiler?
Water in the tubes surrounded by fire
20
Describe a fire tube boiler?
Fire in the tubes surrounded by water
21
An electric boiler is 100% efficient?
True
22
A safety relief is the most important on the boiler?
True
23
One psi equals __” of water column.
27.7”
24
What is the function of a siphon tube on a steam boiler gauge?
The siphon tube holds water
25
Water should be added to a hot water boiler if water is not present in the gauge glass.
False
26
A water column reduces turbulence to provide an accurate water level
True
27
Trycocks are used to determine the boiler water level if the gauge glass is not functioning?
True
28
Which blowdown is used to remove sediment from the bottom of the boiler?
Bottom blowdown
29
Which blowdown is used to remove impurities from the surface water?
Surface blowdown
30
Which blowdown is used to remove impurities from the boiler at a continuous rate?
Continuous blowdown
31
when blowing down a gauge glass, the water should return _____.
Quickly
32
Which test is used to check a boiler for leaks or damage due to a low water condition?
Hydrostatic test (out)
33
Which test is used to check/test a low water cut-off control?
Evaportion test (in)
34
Which test is used to check/test a relief or safety valve?
Accumlation test
35
What does PSIG stand for?
Pounds per square inch gauge
36
What is the minimum age required for a Special Class License?
18 years
37
For the purpose of rating boiler horsepower for engineer license classification only:____ square feet of heating surface shall be considered equivalent to one horsepower for conventional boilers and ____ square feet of heating surface equivalent to one boiler horsepower for steam coil type generators.
10 and 5
38
A year is defined as at least ____ hours.
2000 hours
39
Where the heating surface cannot be discerned, the boiler horsepower shall be determined by calculating BTU boiler-rated input divided by _____.
67,000
40
A high pressure boiler having more than ____ square feet of water heating surface (50 BHP) must have at least two means of feeding water.
500
41
A Tri-Indicator could be found on a _____.
Hot water boiler
42
A Tri-Indicator would inform the boiler operator of which terms?
Temperature of the water, pressure of the water, height of the water.
43
Trycocks are used on a steam boiler to ____?
Indicate the true water level
44
Safety valves or safety relief valves should be manually tested at least.
Monthly
45
The low water cutoff should be tested.
Weekly
46
An ________ is used to control a hot water boiler
aqua-stat
47
A _________ is used to control a steam boiler
pressuretrol
48
one of the most dangerous acts that can be taken by a boiler operator when a dangerous low water condition exists is _______.
add water to the boiler
49
if a person fails the special class license test, they must wait ______ days to retest.
30 days
50
what must be displayed in the boiler room at all times?
engineer’s license, and logbooks
51
how often should a boiler be inspected?
once every year
52
who is responsible to have the boiler inspected?
the operator
53
who would you report a boiler condition too if you thought it was unsafe?
boiler inspector
54
if a safety valve is leaking, what should be done?
replace or repair the valve
55
an aqua-stat works by sensing the boiler
temperature
56
a pressuretrol works by sensing the boilers ______
pressure
57
a siphon tube is found on a _______.
pressuretrol
58
what is the function of a check valve?
allows flow in one direction
59
a boiler with a new burner or a new boiler must have a _________.
a kill switch outside the boiler room
60
an isolation valve can be place between the boiler and the gauge.
yes
61
define a boiler per the statutes?
a vessel in which steam or other vapor, hot water or other hot liquid is generated for use external to itself
62
define a boiler plant per the statues
all boilers on a common header and their related appurtenances
63
define a chief engineer per the statutes
properly licensed engineer required to be in charge of and responsible for the safe operation of a boiler plant
64
define a boiler engineer per the statutes
properly licensed individual who operates and maintains boilers and their appurtenances
65
how much experience is required for a special class license
no experience needed
66
every low pressure or high pressure boiler must have at least one safety valve
true
67
which system controls the flow of gases through the boiler?
draft system
68
mechanical draft is produced by means of a blower or fan assembly
true
69
water quality is not important in a steam boiler
false
70
________ is caused by the formation of steam bubbles trapped below a film on the boiler water surface
foaming