Unit A11 tsbc (2025 )Latest Questions With Passed Solutions!!
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Unit A11 tsbc
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Unit A11 Tsbc
A pressure gauge on an ASME section IV steam boiler:
Select one:
a. Graduated to a maximum setting or double the MAWP
b. Graduated to no less than 30 psi (200 kPa), nor more than 60 psi (414 kPa)
c. Graduated to a maximum setting of double the PRV setting
d. Graduated to between 1.5 and 2 time...
Unit A11 tsbc
A pressure gauge on an ASME section IV steam boiler:
Select one:
a. Graduated to a maximum setting or double the MAWP
b. Graduated to no less than 30 psi (200 kPa), nor more than 60 psi (414 kPa)
c. Graduated to a maximum setting of double the PRV setting
d. Graduated to between 1.5 and 2 times the PRV setting - ✔️✔️B
(4-051-2.1) The Haycock boiler was:
Select one:
a. A watertube design
b. A return tubular design
c. Used around 1720
d. Of welded construction - ✔️✔️C
(4-055-8.1) In a bottom-supported boiler, the steam drum is usually:
Select one:
a. Supported by an overhead girder arrangement
b. Supported by the water tubes
c. Supported by piers
d. Placed between the centre line of the unit - ✔️✔️B
(4-054-1.16) The electrode type boiler:
Select one:
a. Requires a steady load
b. Must operate at very constant pressure
c. Utilizes bundles of electric elements
d. Requires water that conducts electricity - ✔️✔️D
R4A11-04-02-01 ) The operating voltage for a jet-type electrode boiler may be as high
as _________ kilovolts:
Select one:
a. 30
b. 25
c. 5
d. 55 - ✔️✔️B
,(4-090-2.2) In a cast iron modular heating boiler, the operation of the burner of each
module is controlled by a _____ that starts or stops modules in sequence as load
demand increases or decreases.
Select one:
a. Temperature sensor
b. Step controller
c. Thermostat
d. Flow controller - ✔️✔️B
(4-051-1.4) A _____ is a water filled section, which surrounds the firebox in a
locomotive boiler.
Select one:
a. Crown sheet
b. Boiler drum
c. Steam dome
d. Water leg - ✔️✔️D
Class 1 water treatment, as per ASME section VI, is suitable for:
Select one:
a. Cast Iron boilers
b. Watertube Heating Boilers
c. Firetube Heating Boilers
d. Tubular heating boilers - ✔️✔️A
(4-054-1.6) The amount of current passed through the water of an electrode boiler
depends on the:
Select one:
a. Depth of the electrodes in the water
b. Control valve setting
c. Speed of the circulating pump
d. Voltage setting of the pressure control - ✔️✔️A
(4-090-1.2) In a vertical sectional boiler, the sections are placed:
Select one:
a. One above the other
b. Side by side
c. On the furnace
d. Above the draft hood - ✔️✔️B
(4-056-1.16) When an air heater is used in a boiler:
Select one:
a. The induced draft fan supplies combustion air to the air heater
b. It increases the efficiency of the boiler
c. The boiler usually has only a forced draft fan
d. A balanced draft system cannot be used - ✔️✔️B
, (4-061-1.3) A cyclone separator in a boiler steam drum:
Select one:
a. Removes moisture from steam, using centrifugal force
b. Causes impurities to be thrown from the boiler water
c. Is located at the superheater outlet
d. Discharges water into the scrubbers - ✔️✔️A
(4-052-1.3) An internally fired boiler:
Select one:
a. Is less efficient than an externally fired unit
b. Utilizes a high amount of refractory and/or firebrick
c. Has the furnace surrounded by water
d. Requires a setting - ✔️✔️C
(4-055-1.3) Firetube boilers have their tubes fixed into flat steel plates, known as:
Select one:
a. Shells
b. Drums
c. Headers
d. Tube sheets - ✔️✔️D
4-052-3.3) An advantage of a vertical tubeless firetube boiler is that it requires:
Select one:
a. Relatively small floor space
b. No fuel handling equipment
c. Less fuel for combustion
d. Very little water treatment - ✔️✔️A
Operational system checks (rounds) are required, with the results recorded on log-
sheets, as per the samples found in :
Select one:
a. ASME section I
b. ASME section VII
c. ASME section VI
d. ASME section IV - ✔️✔️C
(4-061-1.2) Chemicals are introduced into the boiler:
Select one:
a. In the mud drum
b. By the internal feedwater pipe
c. In the injection tank
d. By the dry pipes - ✔️✔️B
4-055-1.2) One or more steel plates rolled into a cylinder welded together with the ends
closed by rounded heads, is called a:
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