Power Engineering 3B1 Chapter 6
Exam Solved 100% Correct (Verified)
A belt scale operates by measuring the speed of the belt and the weight on a
suspended section of the carrying run. A/An ________ relates running weights to belt
travel and records the tonnage of coal handled.
a. integrator
b. controler
c. electromagnetic
d. elevator - ANSWER-a
A low gas pressure cutoff switch _______ the burner from operating when the gas
pressure in the supply line drops below the pressure necessary to maintain a stable
flame at the burner.
a. promotes
b. prevents
c. opens
d. raises - ANSWER-b
A spreader stoker distributes the coal onto the surface of a traveling grate with ash
discharged at the ______ of the furnace.
a. back
b. front
c. side
d. bottom - ANSWER-b
A tube (or ball) mill is a hollow cylindrical shell, filled, approximately half full, with forged
steel or cast alloy balls, ranging in diameter from ___ mm to ___ mm.
a. 1,25
b. 25, 51
c. 30,40
d. 50, 100 - ANSWER-b
An oil storage tank must not have galvanized pipe, as sulphur in the oil will react with
the galvanizing zinc causing _______.
a. sludge
b. corrosion
c. water
d. ignition - ANSWER-a
An overfeed stoker uses the _____________ flow of fuel and air, with fuel flowing
downward and air flowing upward.
, a. cocurrent
b. crosscurrent
c. countercurrent
d. undercurrent - ANSWER-c
Failure to burn a fuel oil at the correct pressure and temperature and with the correct
atomizer will result in:
Flame sputtering
Carbon formation
Flash back
Soot
1,2,3
1,2,4
2,3,4
1,2,3,4
1,3,4 - ANSWER-d
High-speed impact pulverizers (turning at 1200 to 1800 r/min) consist of a series of
hinged or fixed _______ revolving in a chamber.
a. balls
b. weights
c. hammers
d. wheels - ANSWER-c
In a ________ stoker, air for combustion is supplied by a forced draft fan and passes up
through openings in the grate to the fuel.
a. overfeed
b. crossfeed
c. traveling
d. spreader - ANSWER-b
In a ________ stoker, altering the position of the spill plate or the speed of the rotor
changes the distance the coal is thrown.
a. overfeed
b. crossfeed
c. traveling
d. spreader - ANSWER-d
In a multi-spud burner, each spud is equipped with a ______ valve so that it may be
removed for cleaning.
a. cleaning
b. shutoff
c. globe
d. regulating - ANSWER-b
Exam Solved 100% Correct (Verified)
A belt scale operates by measuring the speed of the belt and the weight on a
suspended section of the carrying run. A/An ________ relates running weights to belt
travel and records the tonnage of coal handled.
a. integrator
b. controler
c. electromagnetic
d. elevator - ANSWER-a
A low gas pressure cutoff switch _______ the burner from operating when the gas
pressure in the supply line drops below the pressure necessary to maintain a stable
flame at the burner.
a. promotes
b. prevents
c. opens
d. raises - ANSWER-b
A spreader stoker distributes the coal onto the surface of a traveling grate with ash
discharged at the ______ of the furnace.
a. back
b. front
c. side
d. bottom - ANSWER-b
A tube (or ball) mill is a hollow cylindrical shell, filled, approximately half full, with forged
steel or cast alloy balls, ranging in diameter from ___ mm to ___ mm.
a. 1,25
b. 25, 51
c. 30,40
d. 50, 100 - ANSWER-b
An oil storage tank must not have galvanized pipe, as sulphur in the oil will react with
the galvanizing zinc causing _______.
a. sludge
b. corrosion
c. water
d. ignition - ANSWER-a
An overfeed stoker uses the _____________ flow of fuel and air, with fuel flowing
downward and air flowing upward.
, a. cocurrent
b. crosscurrent
c. countercurrent
d. undercurrent - ANSWER-c
Failure to burn a fuel oil at the correct pressure and temperature and with the correct
atomizer will result in:
Flame sputtering
Carbon formation
Flash back
Soot
1,2,3
1,2,4
2,3,4
1,2,3,4
1,3,4 - ANSWER-d
High-speed impact pulverizers (turning at 1200 to 1800 r/min) consist of a series of
hinged or fixed _______ revolving in a chamber.
a. balls
b. weights
c. hammers
d. wheels - ANSWER-c
In a ________ stoker, air for combustion is supplied by a forced draft fan and passes up
through openings in the grate to the fuel.
a. overfeed
b. crossfeed
c. traveling
d. spreader - ANSWER-b
In a ________ stoker, altering the position of the spill plate or the speed of the rotor
changes the distance the coal is thrown.
a. overfeed
b. crossfeed
c. traveling
d. spreader - ANSWER-d
In a multi-spud burner, each spud is equipped with a ______ valve so that it may be
removed for cleaning.
a. cleaning
b. shutoff
c. globe
d. regulating - ANSWER-b
