ABSA 4A Test | Questions with Approved Solutions | Latest 2025/202
ABSA 4A
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1. Lowest boiling point of water is at? a. 3000m above the sea
a. 3000m above the sea level level
b. Just below sea levelc.
at 1000m above sea level
d. at 101.3kPa
2. Efficiency of an electrostatic precipitator is: d. 99%
a. 75%
b. 60%
c. 90%
d. 99.9%
3. Non-Return stop valves are important in which situa- d. all of the above
tions
a. when connected in parallel with other boilers
b. when boiler trips
c. if boiler ruptures
d. all of the above
4. 4th class power engineer can take charge of Power c. Up to 5000 kW
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
5. Wear on stem packing is mainly due to: d. Rising and turning mo-
a. Less tight packing tion of the valve stem
b. Stem is under high temperature
c. stem exposed to high corrosive material
d. Rising and turning motion of the valve stem
6.
, ABSA 4A
Study online at https://quizlet.com/_f6bmjk
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 applica-
tions than a globe valve
d. should be operated fully open or fully closed, has
more restriction in a line than a globe valve
7. The flat disc of a butterfly valve rotates through c. 90 degrees
__________ from the wide open to the fully closed po-
sition:
a. 45 degrees
b. 60 degrees
c. 90 degrees
d. 180 degrees
8. An advantage of the gate valve is that it has a low c. fluid flows in a straight
resistance to flow when fully open. This is due to the line through the valve
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
9. If the heating surface area of a boiler is 12 m , kW c. 120 kW
rating of the boiler is:
, ABSA 4A
Study online at https://quizlet.com/_f6bmjk
a. 6 kW
b. 12 kW
c. 120 kW
d. 1200 kW
10. Two methods in common use that provide for expan- d. expansion bends
sion of pipe lines are ___________ and expansion joints
a. expansion pipes
b. corrugation joints
c. bellows joints
d. expansion bends
11. .What are the inside dimensions of schedule 40 pipe d. 102.16
of 114.3 OD:
a. 108.2
b. 120.32
c. 101.31
d. 102.16
12. When using radiographic inspections, defects such as d. darker shadows on the
cracks and porosity show up as: photographic paper
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
13. When a wire is stretched its resistance a. Increases
a. Increases
b. Decreases
, ABSA 4A
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c. Decreases exponentially
d. Doesn't change
14. A groove melted into the parent metal at the toe of the d. undercut
weld and left unfilled by the weld metals is called:
a. inclusion
b. slag
c. cluster
d. undercut
15. When an ultraviolet light is used in welding inspec- c. fluorescent penetrant
tions, the testing method is:
a. destructive
b. ultrasonic
c. fluorescent penetrant
d. radiographic
16. The entire weld joint including the re-hot parent metal b. the heat affected zone
adjacent to the weld joint is called:
a. the stress relief area
b. the heat affected zone
c. the coupon
d. the welding gap
17. The welders to be certified must fabricate weld joints d. coupons
to be tested called a:
a. samples
b. test strips
c. exam plates
d. coupons
18.
ABSA 4A
Update.Study online at https://quizlet.com/_f6bmjk
1. Lowest boiling point of water is at? a. 3000m above the sea
a. 3000m above the sea level level
b. Just below sea levelc.
at 1000m above sea level
d. at 101.3kPa
2. Efficiency of an electrostatic precipitator is: d. 99%
a. 75%
b. 60%
c. 90%
d. 99.9%
3. Non-Return stop valves are important in which situa- d. all of the above
tions
a. when connected in parallel with other boilers
b. when boiler trips
c. if boiler ruptures
d. all of the above
4. 4th class power engineer can take charge of Power c. Up to 5000 kW
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
5. Wear on stem packing is mainly due to: d. Rising and turning mo-
a. Less tight packing tion of the valve stem
b. Stem is under high temperature
c. stem exposed to high corrosive material
d. Rising and turning motion of the valve stem
6.
, ABSA 4A
Study online at https://quizlet.com/_f6bmjk
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 applica-
tions than a globe valve
d. should be operated fully open or fully closed, has
more restriction in a line than a globe valve
7. The flat disc of a butterfly valve rotates through c. 90 degrees
__________ from the wide open to the fully closed po-
sition:
a. 45 degrees
b. 60 degrees
c. 90 degrees
d. 180 degrees
8. An advantage of the gate valve is that it has a low c. fluid flows in a straight
resistance to flow when fully open. This is due to the line through the valve
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
9. If the heating surface area of a boiler is 12 m , kW c. 120 kW
rating of the boiler is:
, ABSA 4A
Study online at https://quizlet.com/_f6bmjk
a. 6 kW
b. 12 kW
c. 120 kW
d. 1200 kW
10. Two methods in common use that provide for expan- d. expansion bends
sion of pipe lines are ___________ and expansion joints
a. expansion pipes
b. corrugation joints
c. bellows joints
d. expansion bends
11. .What are the inside dimensions of schedule 40 pipe d. 102.16
of 114.3 OD:
a. 108.2
b. 120.32
c. 101.31
d. 102.16
12. When using radiographic inspections, defects such as d. darker shadows on the
cracks and porosity show up as: photographic paper
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
13. When a wire is stretched its resistance a. Increases
a. Increases
b. Decreases
, ABSA 4A
Study online at https://quizlet.com/_f6bmjk
c. Decreases exponentially
d. Doesn't change
14. A groove melted into the parent metal at the toe of the d. undercut
weld and left unfilled by the weld metals is called:
a. inclusion
b. slag
c. cluster
d. undercut
15. When an ultraviolet light is used in welding inspec- c. fluorescent penetrant
tions, the testing method is:
a. destructive
b. ultrasonic
c. fluorescent penetrant
d. radiographic
16. The entire weld joint including the re-hot parent metal b. the heat affected zone
adjacent to the weld joint is called:
a. the stress relief area
b. the heat affected zone
c. the coupon
d. the welding gap
17. The welders to be certified must fabricate weld joints d. coupons
to be tested called a:
a. samples
b. test strips
c. exam plates
d. coupons
18.
