Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Boilers > Steam Boilers Module 15 Sessions 3 and 4 > Flashcards

Steam Boilers Module 15 Sessions 3 and 4 Flashcards

1
Q 
The most important fitting on a boiler is the \_\_\_\_\_\_\_\_\_\_\_.
A. Low water fuel cutoff
B. Feedwater regulator
C. Superheater
D. Safety valve
A

D. Safety valve

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q 
To prevent failure from pressure over the MAWP, all steam boilers must be equipped with at least one \_\_\_\_\_\_\_\_\_\_\_\_.
A. Safety valve
B. Blowdown valve
C. Gauge glass
D. Feedwater heater
A

A. Safety valve

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q 
A safety valve will \_\_\_\_\_\_\_\_\_\_\_.
A. Control the boiler operating range
B. Control high or low water
C. Prevent the boiler from exceeding its MAWP
D. Control high and low fire
A

C. Prevent the boiler from exceeding its MAWP

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Safety valves are designed to _______________.
A. Open slowly to prevent water hammer
B. Pop open
C. Open only by hand
D. Open and then close with no drop in pressure

A

B. Pop open

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

Superheater safety valves are set to open
A. After the main safety valves are opened
B. Before the main safety valves are opened
C. Only when header pressure is 6% above the MAWP
D. When the boiler is coming off-line

A

C. Only when header pressure is 6% above the MAWP

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q 
When testing a safety valve by hand, there must be \_\_\_\_\_\_\_\_\_\_\_\_\_\_.
A. At least 75% of the popping pressure
B. No pressure on the boiler
C. An inspector present
D. Someone watching the water level
A

A. At least 75% of the popping pressure

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

Any repairs to a safety valve should be done by the _____________.
A. Chief engineer
B. State inspector
C. Manufacturer’s authorized representative
D. Maintenance department

A

C. Manufacturer’s authorized representative

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

The setting or adjusting of a safety valve should only be done by the ____________.
A. Boiler inspector
B. State inspector
C. Person in charge of the shift
D. Qualified person who is familiar with the construction and operation of a safety valve

A

D. Qualified person who is familiar with the construction and operation of a safety valve

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

If it is necessary to test the relieving capacity of a safety valve ____________.
A. An accumulation test is put on the boiler
B. A hydrostatic test is put on the boiler
C. The boiler must be secured and off-line
D. A bench test must be done

A

A. An accumulation test is put on the boiler

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

The relieving capacity of a safety valve is measured in ____________.
A. British thermal units
B. Boiler Horsepower
C. Btu per boiler horsepower
D. Pounds of steam per hour capable of discharging under a given pressure

A

D. Pounds of steam per hour capable of discharging under a given pressure

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

The main purpose of a water column is to ____________.
A. Reduce turbulence in the gauge glass to get a more accurate reading of the water level in the boiler
B. Reduce surface tension
C. Provide a means of putting an accumulation test on the boiler
D. Provide a place to install the boiler gauge glass

A

A. Reduce turbulence in the gauge glass to get a more accurate reading of the water level in the boiler

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q 
Try cocks are \_\_\_\_\_\_\_\_\_\_\_\_.
A. Found on watertube boilers
A Found on firetube boilers
C. A secondary means of determining water level in a boiler
D. Used to collect boiler water samples
A

C. A secondary means of determining water level in a boiler

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

When replacing a broken gauge glass, the water level is checked by ____________.
A. Blowing down the gauge glass
B. Blowing down the water column
C. Using the try cocks
D. Never check the water level; secure the boiler during repairs

A

C. Using the try cocks

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q 
The water column and gauge glass should usually be blown down \_\_\_\_\_\_\_\_\_\_\_\_.
A. Once per week
B. Once per shift
C. When the boiler is coming off-line
D. Never blow down under pressure
A

B. Once per shift

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

A Whistle valve is used to ____________.
A. Indicate it is 12:00 noon
B. Indicate a shift change
C. Warn the operator of high or low water
D. Warn the operator of a leaking blowdown line

A

C. Warn the operator of high or low water

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q 
A steam pressure gauge is calibrated in \_\_\_\_\_\_\_\_\_\_\_\_.
A. Pounds per cubic inch
B. Btu per pound
C. Pounds per temperature increase
D. Pounds per square inch
A

D. Pounds per square inch

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q 
A siphon protects the steam pressure gauge from \_\_\_\_\_\_\_\_\_\_\_\_.
A. Boiler pressure
B. High temperature of steam
C. Water entering the Bourdon tube
D. Air entering the Bourdon tube
A

B. High temperature of steam

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q 
The pressure at the base of a vertical foot of water is \_\_\_\_\_\_\_\_\_\_\_\_ psi.
A. O.433 
B. 8.3
C. 14.7
D. 34.5
A

A. O.433

19
Q

The boiler vent is located at the ____________.
A. Main steam line
B. Superheater outlet
C. Highest part of the mud drum
D. Highest part of the steam side of the boiler

A

D. Highest part of the steam side of the boiler

20
Q

The boiler vent is open when warming up a boiler until ____________.
A. The boiler is cut in on the line
B. There is 2 to 3 psi of steam pressure on the boiler
C. The superheater drain is closed
D. An operator manually closes it

A

D. An operator manually closes it

21
Q

Steam separators work on the principle of ____________.
A. Potential energy
B. Kinetic energy
C. Trapping steam and letting water through
D. Changing the direction of the steam flow

A

D. Changing the direction of the steam flow

22
Q

The dry pipe is located in the ____________.
A. Upper part of the steam and water drum
B. Superheater outlet header
C. Main steam line
D. Line before the turbine throttle

A

A. Upper part of the steam and water drum

23
Q 
Cyclone separators are used in \_\_\_\_\_\_\_\_\_\_\_\_.
A. Low to medium pressure boilers
B. Boilers equipped with superheaters
C. Boiler chimneys
D. Boiler breeching
A

B. Boilers equipped with superheaters

24
Q

Saturated steam is steam at ____________.
A. A higher temperature than its corresponding pressure
B. Its corresponding temperature and pressure
C. A dry state
D. The superheater outlet

A

B. Its corresponding temperature and pressure

25
Q

When steam is superheated the ____________.
A. Pressure is increased along with its temperature
B. Volume increases
C. Temperature increases with no increase in pressure
D. Pressure increases

A

C. Temperature increases with no increase in pressure

26
Q 
Superheater tubes are protected from warping or burning out by \_\_\_\_\_\_\_\_\_\_\_\_.
A. A Continuous flow of steam
B. Circulation of steam and Water
C. Continuous circulation of hot air
D. Circulation of flue gases
A

A. A continuous flow of steam

27
Q

Soot should be ____________.
A. Removed from boiler tubes for better heat transfer
B. Left on boiler tubes to protect them from burning out
C. Only left on superheater tubes
D. Saved to cover lines running outside

A

A. Removed from boiler tubes for better heat transfer

28
Q 
Soot blowers are mainly found on \_\_\_\_\_\_\_\_\_\_\_\_.
A. Waterwalls
B. Watertube boilers
C. Firetube boilers
D. Main breeching
A

B. Watertube boilers

29
Q

Steam impinging on boiler tubes would ____________.
A. Keep tubes exceptionally clean
B. Cut through the boiler tubes in a very short period of time
C. Have no effect on boiler tubes
D. Cause undue thermal shock

A

B. Cut through the boiler tubes in a very short period of time

30
Q

To ensure that moisture-free steam goes to the soot blower, the steamline to the soot blower must come off the ____________.
A. Main steam line
B. Superheater outlet header
C. Highest part of the steam side of the drum
D. Waterwall outlet

A

C. Highest part of the steam side of the drum

31
Q

Boilers in battery equipped with manhole openings must have ____________ according to the ASME code.
A. Two main steam stop valves
B. One main steam stop valve
C. No valves between boiler and header
D. Boilers in battery have no manhole openings

A

A. Two main steam stop valves

32
Q 
Main boiler stop valves must be \_\_\_\_\_\_\_\_\_\_\_\_ valves.
A. OS&Y gate
B. OS&Y globe
C. Quick-closing lever-type
D. Plug-type
A

A. OS&Y gate

33
Q

The main steam stop valves should be gate valves because they ____________.
A. Can restrict the flow of steam
B. Can be used as throttling valves
C. Do not have to be fully open
D. Offer no restriction to the flow of steam

A

D. Offer no restriction to the flow of steam

34
Q

When the boiler is equipped with hand-operated, main steam stop valves, to cut the boiler in on the line, the steam pressure on the incoming boiler should be ____________.
A. Slightly higher than line pressure
B. Equal to line pressure
C. Slightly lower than line pressure
D. Makes no difference; pressure will equalize

A

C. Slightly lower than line pressure

35
Q 
During boiler warm-up, to remove any condensate trapped between the two boiler stop valves, the \_\_\_\_\_\_\_\_\_\_\_\_ should be open.
A. Free-blowing drain
B. Superheater drain
C. Boiler vent
D. Equalizing line
A

A. Free-blowing drain

36
Q 
The three major causes of a low water condition in a boiler are: carelessness or inattention, over firing of a boiler, and \_\_\_\_\_\_\_\_\_\_\_\_.
A. Defects in a system
B. Poor maintenance
C. Buying poor quality boilers
D. Inexperienced workers
A

A. Defects in a system

37
Q

During normal usage, the main boiler steam line expands and contracts. To allow for this ____________.
A. Rigid pipe hangers are used
B. Expansion bends are used
C. The main steam line must be welded to external braces
D. Nothing has to be done; this will take care of itself

A

B. Expansion bends are used

38
Q 
According to the ASME code, boilers operating at 100 psi or over must have \_\_\_\_\_\_\_\_\_\_\_\_.
A. No bottom blowdown valves
B. Only one bottom blowdown valve
C. Two bottom blowdown valves
D. Up to manufacturer of boiler
A

C. Two bottom blowdown valves

39
Q

When blowing down a boiler equipped with a quick-opening valve and
A screw-type valve, the quick-opening valve is ____________.
A. Opened first and closed last
B. Opened last and closed first
C. Opened first and closed first
D. Opened as operator prefers

A

A. Opened first and closed last

40
Q 
The maximum size of the bottom blowdown line and the surface blowdown line is:
A. 1 1/2
B. 2 1/2
C. 3
D. No maximum size required
A

B. 2 1/2

41
Q 
Bottom blowdown lines on a water tube boiler are located on the \_\_\_\_\_\_\_\_\_\_\_\_.
A. Mud drum
B. Bottom of the steam and water drum
C. Superheater outlet header
D. Lowest part of the combustion chamber
A

B. Bottom of the steam and water drum

42
Q

The most accurate means of deciding the frequency of blowdown of a boiler is determined by a ____________.
A. Flue gas analysis
B. Boiler operator
C. Boiler water analysis
D. The feedwater chemical sales representative

A

C. Boiler water analysis

43
Q

Surface tension on the water in the steam and water drum is increased by ____________.
A. Impurities that float on the surface of the water
B. Inexperienced boiler operators
C. Very soft water
D. A high steam load

A

A. Impurities that float on the surface of the water

44
Q

To protect sewer lines from the high temperature and high pressure coming from the boiler blowdown lines ____________.
A. Traps are used
B. Blowdown tanks are used
C. Steam separators are used
D. Nothing has to be used. They can handle all temperatures and pressures

A

B. Blowdown tanks are used

Boilers (10 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions