Exam (elaborations)
STEAM BOILERS EXAM QUESTIONS AND ANSWERS #16.
- Module
- MN BOILER EXM
- Institution
- MN BOILER EXM
STEAM BOILERS EXAM QUESTIONS AND ANSWERS #16.
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STEAM BOILERS EXAM QUESTIONS AND ANSWERS #161. A low pressure steam boiler has a maximum allowable working pressure (MAWP) up to:
A : 15 psi
B : 35 psi
C : 100 psi
D: no MAWP: A : 15 psi
2. In a fire tube boiler, the heat and gases of combustion pass
A : through the tubes
B : around the tubes
C : only through the combustion chamber
D: both A and B: C : only through the combustion chamber
3. A fire tube boiler may be used
A : only in low pressure plants
B : only in high pressure plants
C : in high or low pressure plants
D: only for process steam: B : only in high pressure plants
4. Because of the large of water, the boiler most likely to cause a boiler explosion is
A : a watertube boiler
B : a firetube boiler
C : both can
D: boilers cannot explode: B : a firetube boiler
5. A horizontal return tubular (HRT) boiler is boiler
A : a firetube
B : a watertube
C : either a firetube or a watertube D: none of
the above: A : a firetube
6. A sudden drop in boiler steam pressure without a corresponding drop in boiler water
temperature could result in
A : loss of efficiency
B : boiler explosion
C : an increase in surface tension
D: no effect on boiler: B : boiler explosion
7. The part of a boiler that has the heat and gases of combustion on one side & water on the other
side is known as the
A : water surface
B : steam surface
C : fire side
D: heating surface: D: heating surface
,STEAM BOILERS EXAM QUESTIONS AND ANSWERS #16
8. The comparison, or ratio, of heat supplied in fuel to heat absorbed by water is defined as
efficiency.
A : combustion
B : watertube
C : thermal
D: overall plant: C : thermal
9. The steam and water drum of watertube boilers is dished (concave) to eliminate the need for
A : brickwork
B : waterwalls
C : stays
D: baffles: C : stays
10.Vertical firetube boilers require :
A : high ceilings
B : less floor space
C : the use of staybolts
D: all of the above: D : all of the above
11.In a watertube boiler, the heat and gases of combustion pass
A : through the tubes
B : around the tubes
C : through and around the tubes
D: only through the combustion chamber: B : around the tubes
12.The boiler has a large volume of water in relation to horsepower size
A : firetube
B : watertube
C : process steam
D: vertical watertube: A : firetube
13.The mud drum is the lowest part of the waterside of a(n) boiler
A : HRT
B : watertube
C : low pressure firetube
D: high pressure firetube: B : watertube
14.Boiler plates and staybolts are subjected to stress
A : tensile
B : compressive
C : shear
D: no stress when boiler is under pressure: A : tensile
15.Safety valve connections must be approved by the : A : fire
department
, STEAM BOILERS EXAM QUESTIONS AND ANSWERS #16
B : shift foreman
C : American Society of Mechanical Engineers (ASME)
D: American Boiler Manufacturers Association (ABMA): C : American Society of Mechanical
Engineers
16.The most important fitting on a boiler is the
A : low water fuel cut off
B : feedwater regulator
C : superheater
D: safety valve: D : safety valve
17.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 : safety valve
18.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: C : prevent the boiler from exceeding its MAWP
19.Safety valves are designed to
A : open slowly to prevent water hammer
B : pop open
C : open only by hand
D: open and close with no drop in pressure: B : pop open
20.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: B : before the main safety valves are opened
21.When testing a safety valve, 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 : at least 75% of the popping pressure
22.Any repairs to the safety valve must be done by the
A : chief engineer
B : state inspector
C : safety valve manufacturer or manufacturers authorized representative
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