ABSA 4A Questions with CORRECT Answers (Grade
A+)
Question 1:
Lowest boiling point of water is at? a. 3000m above the sea level b. Just below sea levelc. at 1000m
above sea level d. at 101.3kPa
Answer:
a. 3000m above the sea level
Question 2:
Efficiency of an electrostatic precipitator is: a. 75% b. 60% c. 90% d. 99.9%
Answer:
d. 99%
Question 3:
Non-Return stop valves are important in which situations a. when connected in parallel with other
boilers b. when boiler trips c. if boiler ruptures d. all of the above
Answer:
d. all of the above
Question 4:
4th class power engineer can take charge of Power Plant as a shift Engineer: a. Up to 500 kW b. Up to
1000 kW c. Up to 5000 kW d. Up to 10000 kW
Answer:
c. Up to 5000 kW
Question 5:
Wear on stem packing is mainly due to: a. Less tight packing b. Stem is under high temperature c. stem
exposed to high corrosive material d. Rising and turning motion of the valve stem
Answer:
d. Rising and turning motion of the valve stem
,Question 6:
Question not clearly extracted from source.
Answer:
The following is true of a gate valve: b. has less restriction in a. has less restriction in a line than a
globe valve, is a line than a globe valve, used to throttle flow should be operated fully b. has less
restriction in a line than a globe valve, open or fully closed should be operated fully open or fully
closed c. is used to throttle flow, is used for different applications than a globe valve d. should be
operated fully open or fully closed, has more restriction in a line than a globe valve
Question 7:
The flat disc of a butterfly valve rotates through __________ from the wide open to the fully closed
position: a. 45 degrees b. 60 degrees c. 90 degrees d. 180 degrees
Answer:
c. 90 degrees
Question 8:
An advantage of the gate valve is that it has a low resistance to flow when fully open. This is due to the
fact that: a. gate valves are larger than globe valves b. fluid handled by gate valves is of higher
viscosity than that handled by globe valves c. fluid flows in a straight line through the valve d. gate
valves are used in horizontal installations only
Answer:
c. fluid flows in a straight line through the valve
Question 9:
If the heating surface area of a boiler is 12 m , kW rating of the boiler is:
Answer:
c. 120 kW a. 6 kW b. 12 kW c. 120 kW d. 1200 kW
Question 10:
Two methods in common use that provide for expansion of pipe lines are ___________ and expansion
joints a. expansion pipes b. corrugation joints c. bellows joints d. expansion bends
Answer:
d. expansion bends
, Question 11:
.What are the inside dimensions of schedule 40 pipe of 114.3 OD: a. 108.2 b. 120.32 c. 101.31 d.
102.16
Answer:
d. 102.16
Question 12:
When using radiographic inspections, defects such as cracks and porosity show up as: a. lighter
shadows on the photographic paper b. wave signals on a small screen c. darker shadows on the
penetrometer d. darker shadows on the photographic paper
Answer:
d. darker shadows on the photographic paper
Question 13:
When a wire is stretched its resistance a. Increases b. Decreases
Answer:
a. Increases c. Decreases exponentially d. Doesn't change
Question 14:
A groove melted into the parent metal at the toe of the weld and left unfilled by the weld metals is
called: a. inclusion b. slag c. cluster d. undercut
Answer:
d. undercut
Question 15:
When an ultraviolet light is used in welding inspections, the testing method is: a. destructive b.
ultrasonic c. fluorescent penetrant d. radiographic
Answer:
c. fluorescent penetrant
Question 16:
The entire weld joint including the re-hot parent metal adjacent to the weld joint is called: a. the stress
relief area b. the heat affected zone c. the coupon d. the welding gap
Answer:
b. the heat affected zone
A+)
Question 1:
Lowest boiling point of water is at? a. 3000m above the sea level b. Just below sea levelc. at 1000m
above sea level d. at 101.3kPa
Answer:
a. 3000m above the sea level
Question 2:
Efficiency of an electrostatic precipitator is: a. 75% b. 60% c. 90% d. 99.9%
Answer:
d. 99%
Question 3:
Non-Return stop valves are important in which situations a. when connected in parallel with other
boilers b. when boiler trips c. if boiler ruptures d. all of the above
Answer:
d. all of the above
Question 4:
4th class power engineer can take charge of Power Plant as a shift Engineer: a. Up to 500 kW b. Up to
1000 kW c. Up to 5000 kW d. Up to 10000 kW
Answer:
c. Up to 5000 kW
Question 5:
Wear on stem packing is mainly due to: a. Less tight packing b. Stem is under high temperature c. stem
exposed to high corrosive material d. Rising and turning motion of the valve stem
Answer:
d. Rising and turning motion of the valve stem
,Question 6:
Question not clearly extracted from source.
Answer:
The following is true of a gate valve: b. has less restriction in a. has less restriction in a line than a
globe valve, is a line than a globe valve, used to throttle flow should be operated fully b. has less
restriction in a line than a globe valve, open or fully closed should be operated fully open or fully
closed c. is used to throttle flow, is used for different applications than a globe valve d. should be
operated fully open or fully closed, has more restriction in a line than a globe valve
Question 7:
The flat disc of a butterfly valve rotates through __________ from the wide open to the fully closed
position: a. 45 degrees b. 60 degrees c. 90 degrees d. 180 degrees
Answer:
c. 90 degrees
Question 8:
An advantage of the gate valve is that it has a low resistance to flow when fully open. This is due to the
fact that: a. gate valves are larger than globe valves b. fluid handled by gate valves is of higher
viscosity than that handled by globe valves c. fluid flows in a straight line through the valve d. gate
valves are used in horizontal installations only
Answer:
c. fluid flows in a straight line through the valve
Question 9:
If the heating surface area of a boiler is 12 m , kW rating of the boiler is:
Answer:
c. 120 kW a. 6 kW b. 12 kW c. 120 kW d. 1200 kW
Question 10:
Two methods in common use that provide for expansion of pipe lines are ___________ and expansion
joints a. expansion pipes b. corrugation joints c. bellows joints d. expansion bends
Answer:
d. expansion bends
, Question 11:
.What are the inside dimensions of schedule 40 pipe of 114.3 OD: a. 108.2 b. 120.32 c. 101.31 d.
102.16
Answer:
d. 102.16
Question 12:
When using radiographic inspections, defects such as cracks and porosity show up as: a. lighter
shadows on the photographic paper b. wave signals on a small screen c. darker shadows on the
penetrometer d. darker shadows on the photographic paper
Answer:
d. darker shadows on the photographic paper
Question 13:
When a wire is stretched its resistance a. Increases b. Decreases
Answer:
a. Increases c. Decreases exponentially d. Doesn't change
Question 14:
A groove melted into the parent metal at the toe of the weld and left unfilled by the weld metals is
called: a. inclusion b. slag c. cluster d. undercut
Answer:
d. undercut
Question 15:
When an ultraviolet light is used in welding inspections, the testing method is: a. destructive b.
ultrasonic c. fluorescent penetrant d. radiographic
Answer:
c. fluorescent penetrant
Question 16:
The entire weld joint including the re-hot parent metal adjacent to the weld joint is called: a. the stress
relief area b. the heat affected zone c. the coupon d. the welding gap
Answer:
b. the heat affected zone
