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5th Class Power Engineering Book 1 > Book 1: Unit 1 - Review: Attempt Review > Flashcards

Book 1: Unit 1 - Review: Attempt Review Flashcards

1
Q 
Cast-iron sectional boilers are connected by means of:
A. Screw jacks
B. Pipe nipple
C. Tapered bushing
D. Tie rods
E. Push nipple
A

E. Push nipples

cast iron sectional

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2
Q 
Water circulation in the longitudinal drum boiler is created by:
A. Direction of feedwater supply 
B. Lower density feedwater
C. Higher density feedwater
D. The water circulation pump
E. Higher density boiler water
A

E. Higher density boiler water

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3
Q

The tubes of a serpentine watertube boiler are connected to the upper and lower headers by:

A. Welding
B. Crosby clips
C. Silver solder
D. Threaded connections 
E. Four bolt flanges
A

D. Threaded connections

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4
Q 
Since pure water will not conduct electricity a predetermined amount of electrolyte (\_\_\_\_\_) is dissolved in the water.
A. NaSO3
B. NaOH
C. H2SO4
D. NaCl 
E. HCl
A

D. NaCl

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5
Q

The electrode type electric boiler consists of two cylindrical chambers:
A. The inner one forming the generating compartment and the other the regulating compartment
B. The inner one forming the regulating compartment and the other the steam compartment
C. The inner one forming the regulating compartment and the other the generating compartment
D. The inner one forming the fire compartment and the other the generating compartment
E. The inner one forming the steam compartment and the other the generating compartment

A

A. The inner one ‘‘forming the generating compartment’’ and the other the ‘‘regulating compartment’’

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6
Q

The crown sheet of a Locomotive boiler was held in place by:

A. Longitudinal stays
B. Stay bolts
C. Radial stays 
D. Fusible plugs
E. Grates
A

C. Radial stays

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7
Q

One of the characteristics of a firetube boiler is:

A. The small amount of heat stored in the water makes it possible to meet load changes quickly
B. Their small water capacity makes them fast in coming up to operating pressure
C. Their large water capacity makes them slow in coming up to operating pressure
D. Their small water capacity makes them slow in coming up to operating pressure
E. Their large water capacity makes them fast in coming up to operating pressure

A

D. Their “SMALL WATER CAPACITY MAKES THEM SLOW” in coming up to operating pressure
Keyword:SMALL WATER CAPACITY

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8
Q 
The uptake area of a Locomotive boiler was often equipped with a:
A. Damper for combustion control
B. Fire door
C. Smoke box for smoke control
D. Water leg 
E. Damper for combustion air control
A

A. Damper for combustion control

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9
Q 
In an immersion-type electric boiler scale "tends to form on the"
A. Elements 
B. Firetube bundles
C. Watertube bundles
D. Electrodes
E. Walls of the basket
A

A.Elements

tends to form on the

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10
Q

“Prior to the power being turned on” in an electrode type electric boiler the “water levels in the two chambers” would be:

A. Higher in the inner chamber
B. Higher in the outer chamber 
C. The same in both chambers
D. Lower in the fire tubes
E. Lower in the water tubes
A

C. The same in both chambers

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11
Q 
The “A” type boiler is constructed with \_\_\_\_\_ drums
A. One
B. Two
C. Three 
D. Five
E. Four
A

C.Three

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12
Q 
The Steel plate heating boiler is classified as a \_\_\_\_\_ pass boiler.
A. Four
B. Multi
C. Two
D. Three
E. One
A

E.One

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13
Q

An advantage of a multiple heating boiler plant is:

A. Most low capacity can be moved through standard sized doorways
B. That with a small water content a pressure part failure will cause more damage
C. That they have a large water capacity
D. They are light requiring a minimal foundation
E. The boilers are heavy requiring special foundations

A

A. Most low capacity can be moved through standard sized doorways

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14
Q

The HRT boiler is classified as a _____ pass boiler.

A. Three
B. Four
C. One
D. Multi
E. Two
A

E. Two

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15
Q

In order to reduce extensive heat losses from the externally fires furnace walls:

A. The furnace grate was placed inside the enlarged return flue
B. The furnace walls were lined with refractory
C. The furnace was made longer
D. The furnace was enlarged
E. More firetubes were added

A

A. The ‘‘furnace grate’‘was placed inside the enlarged return flue

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16
Q 
The boilers in multiple boiler heating plants are operated:
A. By temperature controllers
B. Individually by separate controllers
C. Manually as required
D. By the outdoor temperature
E. In sequence by a step controller
A

E. In sequence by a step controller

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17
Q 
The “O” type boiler is constructed with \_\_\_\_\_ drums.
A. Three
B. One
C. Two 
D. Five
E. Four
A

C. Two

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18
Q 
An immersion-type electric boiler has:
A. Water tubes
B. No steam space 
C. Electrodes
D. Tube bundles
E. Elements
A

B. No steam space

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19
Q 
Cast-iron sectional boilers are held tightly together by means of:
A. Tie rods 
B. Push nipples
C. Pipe flanges
D. Pipe nipples
E. Tapered bushings
A

A. Tie rods

Keyword : HELD TIGHTLY

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20
Q 
In the firetube boiler \_\_\_\_\_ pass through the tubes.
A. Hot air
B. Fuel oil
C. Fuel gas
D. Hot gases 
E. Feedwater
A

D. Hot gases

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21
Q

The lower tubes of the serpentine watertube boiler are exposed to the _____ heat from the fire.

A.Radiant
B.Convection
C.Conduction
D.Radiant and conduction
E.Convection and conduction
A

A.Radiant

22
Q 
Small capacity heating boilers operate most efficiently at:
Select one:
A. Any load condition
B. Approximately 25% load
C. Approximately 75% load
D. Approximately 50% load
E. Continuous full load
A

E. Continuous full load

23
Q

A disadvantage of “condensing boilers”is that:
Select one:

A. Any moisture in the flue gases will not condense out
B. The boilers are more expensive than customary boilers
C. The boilers are less expensive than customary boilers
D. The heat exchangers in them are quite small
E. Less heat is extracted from the hot flue gases

A

B. The “boilers are more expensive” than “customary boilers”

24
Q

A disadvantage of condensing boilers is that:
Select one:

A. Any moisture in the flue gases will not condense out
B. The boilers are more expensive than customary boilers
C. The boilers are less expensive than customary boilers
D. The heat exchangers in them are quite small
E. Less heat is extracted from the hot flue gases

A

B. The boilers are more expensive than customary boilers

25
Q 
The cylindrical portion of the Locomotive boiler that connected the furnace to the smoke box was termed the:
Select one:
A. Furnace
B. Barrel
C. Fire door
D. Firetube
E. Crown sheet
A

B. Barrel

26
Q

Steel plate heating boilers have thin steel installed in the:
Select one:

A. Water tubes to give the water a swirling motion
B. Firetubes to give the gases a swirling motion
C. Firetubes to give the water a swirling motion
D. Firetubes to give the air a swirling motion
E. Water tubes to give the gases a swirling motion

A

B. Firetubes to give the gases a swirling motion

27
Q

A major advantage of the Locomotive boiler was the:
Select one:
A. Size of the smoke box
B. Internal furnace
C. Use of longitudinal stays
D. Absence of brickwork, refractory or setting
E. Use of a draft inducer

A

D. Absence of brickwork, refractory or setting

28
Q

An immersion-type electric boiler has:
Select one:

A. Electrodes
B. Elements 
C. Water tubes
D. Tube bundles
E. No steam space
A

B. Elements

29
Q

Output of an immersion electric boiler is regulated by altering the:
Select one:
A. Amount of current flowing through the water
B. Water level relative to the electrodes
C. Amount of current flowing through the elements
D. Water level relative to the elements
E. The voltage applied to the boiler

A

C. Amount of current flowing through the elements

30
Q 
In the electrode type electric boiler the electrodes are located in the:
Select one:
A. Firebox
B. Central generating chamber 
C. Firetube section
D. Watertube section
E. Windbox
A

B. Central generating chamber

31
Q 
Prior to the power being turned on in an electrode type electric boiler the water levels in the two chambers would be:
Select one:
A. Lower in the fire tubes
B. Higher in the outer chamber
C. The same in both chambers 
D. Higher in the inner chamber
E. Lower in the water tubes
A

C. The same in both chambers

32
Q

Boiler gauge glass packing nuts may be tightened:
Select one:

A. At any time
B. With a torque wrench
C. Once the glass has cooled to room temperature
D. Once the pressure has been removed 
E. Only hand tight
A

D. Once the pressure has been removed

33
Q 
Pressure gauges may loose their accuracy due to:
Select one:
A. Steam entering the Bourdon tube
B. Wear and tear
C. All of the above 
D. Metal fatigue
E. Excessive vibration
A

C. All of the above

34
Q

A pipe siphon is used on a boiler to:
Select one:
A. Maintain a water seal between the water and the Bourdon tube
B. Remove water from the boiler drum
C. Maintain a water seal between the steam and the Bourdon tube
D. Maintain a steam seal between the steam and the Bourdon tube
E. Add water to the Bourdon tube

A

C. Maintain a water seal between the steam and the Bourdon tube

35
Q 
When the pressure in the boiler approaches its \_\_\_\_\_, the safety valve will pop open and release the steam to atmosphere.
Select one:
A. Normal process header steam pressure
B. Turbine inlet operating pressure
C. Ultimate tensile strength
D. Maximum allowable working pressure 
E. Normal steam drum operating pressure
A

D. Maximum allowable working pressure

36
Q 
A valve commonly used as a ''boiler stop valve'' is the \_\_\_\_\_ valve.
Select one:
A. Plug
B. Ball 
C. Needle
D. Gate
E. Butterfly
A

D. Gate

37
Q

The procedure for testing a directly connected gauge glass would be.

  1. Close the gauge water valve
  2. Open the gauge water valve
  3. Close the gauge steam valve
  4. Open the gauge steam valve
  5. Close the gauge drain valve
  6. Open the gauge drain valve
  7. Proving steam passage is clear
  8. Proving water passage is clear
Select one:
A. 3, 6, 8, 3, 7, 5
B. 1, 6, 7, 3, 8, 5
C. 1, 6, 7, 3, 2, 8, 5 
D. 3, 6, 8, 4, 1, 7, 2
E. 1, 6, 7, 2, 8, 3
A

C. 1, 6, 7, 3, 2, 8, 5

38
Q

The blowdown tank is/does

Select one:

a. Does not allow the pressure to be reduced
b. Does not empty into the sewer
c. Is not required on a low pressure boiler
d. Not cool the water

A

c. Is not required on a low pressure boiler

39
Q 
A Bourdon tube is in the shape of:
Select one:
A. A bellows
B. The letter “C” and oval in cross section 
C. A diaphragm
D. The letter “C”
E. An oval in the cross section
A

B. The letter “C” and oval in cross section

40
Q

The safety valve pop test can be carried out by:
Select one:

A. Reducing the pressure on the spring
B. Lowering the try lever 
C. Popping the valve with a hammer
D. Lifting the try lever
E. Slowly raising the boiler pressure
A

E. Slowly raising the boiler pressure

41
Q

Gauge glass safety shutoff valves are equipped with a:
Select one:

A. Stainless steel ball
B. Flapper disc 
C. Brass plug
D. Floating disc
E. Self closing stem
A

A. Stainless steel ball

42
Q

Early HRT boilers were fired using:

A. Coal on grates
B. Natural gas
C. Fuel oil
D. Pulverized coal
E. Wood stokers
A

A. Coal on grates

43
Q

The maximum pressure for a low-pressure steam boiler is:

a) 103 kPa (14.7 psi)
b) 160 kPa (23.2 psi)
c) 250 kPa (36.2 psi)
d) 1100 kPa (160 psi)

A

a) 103 kPa (14.7 psi)

NOTE: low-pressure steam boiler is:

44
Q

The main part of a high-pressure firetube boiler is called the:

a) windbox
b) furnace
c) shell
d) dru

A

c) shell

45
Q

In a vertical firetube boiler, the steam space is located:

a) in a separate chamber
b) in a compartment on the side
c) at the lower part of the shell
d) at the top of the shell

A

d) at the top of the shell

46
Q

In which of these boilers does the firing occur in a downward direction?

a) immersion electrode
b) vertical electric
c) vertical firetube
d) vertical tubeless

A

d) vertical tubeless

NOTE:firing occur in a downward direction

47
Q

The “pipe” is a common term for:

a) the combustion chamber of a vertical tubeless boiler
b) the drain on an immersion boiler
c) the water jacket of a vertical boiler
d) the steam outlet of an electrode boiler

A

a) the combustion chamber of a vertical tubeless boiler

48
Q

In a vertical firetube boiler:

a) the water passes through the inside of the tubes
b) the steam accumulates in the lower part of the boiler shell
c) the horizontal shell has vertical firetubes at each end
d) the upper part of the tubes are cooled by steam

A

d) the upper part of the tubes are cooled by steam

49
Q

The chief advantage of a packaged heating boiler is:

a) its compactness
b) mass production ability
c) higher pressure rating
d) its higher factor of safety

A

b) mass production ability

50
Q 
On a hot water boiler, the highest value on the graduated scale of the pressure gauge shall not be less than \_\_\_\_\_ times the pressure at which the pressure relief valve is set..
Select one:
A. 3
B. 3.5
C. 1.5 
D. 2
E. 2.5
A

C. 1.5

5th Class Power Engineering Book 1 (20 decks)

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