ABSA 4a EXAM STUDY GUIDE
2026/2027 ACCURATE QUESTIONS
WITH CORRECT DETAILED
SOLUTIONS ||
100% GUARANTEED PASS
<NEWEST VERSION>
1. When applying to write a Power Engineer certificate of competency
examination, the candidate must: Select one:
a. Undergo mandatory drug testing
b. Hold the next lower class of qualification
c. Pass a criminal records check
d. Pass both a written and oral examination - ANSWER ✔ b. Hold the
next lower class of qualification
2. A machine lifts a load of 12kN with an applied effort of 4kN. What distance
will the load move if the effort moves a distance of 8m and the efficiency of
the machine is 70%?
Select one:
a. 0.54 m
b. 3.81 m
c. 1.87 m
d. 0.38 m - ANSWER ✔ c. 1.87 m
3. Which of these is the "Mechanical Refrigeration Code"?
Select one:
a. ASME MRC
b. CSA B51.
c. CSA B52.
d. ASME Section I. - ANSWER ✔ c. CSA B52.
,4. In order to ensure safe and continuous operation of a pressure reducing
valve, the valve station should have _________________.
Select one:
a. A safety valve on the high-pressure side
b. A bypass line, plus a safety valve and pressure gauge on the low-
pressure side
c. Thermometers on the inlet and outlet piping
d. A strainer immediately downstream of the valve - ANSWER ✔ b. A
bypass line, plus a safety valve and pressure gauge on the low-
pressure side
5. If the power dissipated by a resistor is 1.2 kW when supplied with 110 V,
the amperage will be _____ A. Select one:
a. 91.666
b. 19.006
c. 10.91
d. 132 - ANSWER ✔ c. 10.91
6. The inclined "U" tube manometer:
Select one:
a. Will measure pressure in MPa
b. Can only be used with mercury
c. Is more accurate than the "U" tube manometer
d. Is more difficult to read than the U-tube manometer - ANSWER ✔
c. Is more accurate than the "U" tube manometer
7. The water flow through a modular cast iron boiler system:
Select one:
a. Continuous through all modules
b. Connected in series
c. Intermittent, occurring only while the unit is firing
d. Done without the use of headers or manifolds - ANSWER ✔ a.
Continuous through all modules
8. On-off thermostats are equipped with:
Select one:
a. An open contact switch
b. Humidity compensation
, c. Two or more switches, operated in sequence
d. A potentiometer - ANSWER ✔ a. An open contact switch
9. In a balanced draft system, the forced draft fan is:
Select one:
a. Larger than the induced draft fan
b. Smaller than the induced draft fan
c. Designed to handle hot combustion gases
d. Used to maintain a slight negative pressure in the furnace - ANSWER
✔ b. Smaller than the induced draft fan
10.Current flow is:
Select one:
a. Increases as the applied voltage increases
b. Proportional to the resistance
c. Unaffected by resistance
d. Increases when applied voltage decreases - ANSWER ✔ a. Increases
as the applied voltage increases
11.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
12.Efficiency of an electrostatic precipitator is:
a. 75%
b. 60%
c. 90%
d. 99.9% - ANSWER ✔ d. 99%
13.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
14.4th 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
15.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
16.The following is true of a gate valve:
a. has less restriction in a line than a globe valve, is used to throttle flow
b. has less restriction in a line than a globe valve, 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 - ANSWER ✔ b. has less restriction in a line
than a globe valve, should be operated fully open or fully closed
17.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
18.Dissolved oxygen in condensate:
Select one:
a. Will cause waterside corrosion
b. Can cause scaling on the return lines
c. Is removed with amines
d. Necessitates the installation of a deaerator - ANSWER ✔ a. Will
cause waterside corrosion
19.A characteristic of mechanical draft is that the draft:
2026/2027 ACCURATE QUESTIONS
WITH CORRECT DETAILED
SOLUTIONS ||
100% GUARANTEED PASS
<NEWEST VERSION>
1. When applying to write a Power Engineer certificate of competency
examination, the candidate must: Select one:
a. Undergo mandatory drug testing
b. Hold the next lower class of qualification
c. Pass a criminal records check
d. Pass both a written and oral examination - ANSWER ✔ b. Hold the
next lower class of qualification
2. A machine lifts a load of 12kN with an applied effort of 4kN. What distance
will the load move if the effort moves a distance of 8m and the efficiency of
the machine is 70%?
Select one:
a. 0.54 m
b. 3.81 m
c. 1.87 m
d. 0.38 m - ANSWER ✔ c. 1.87 m
3. Which of these is the "Mechanical Refrigeration Code"?
Select one:
a. ASME MRC
b. CSA B51.
c. CSA B52.
d. ASME Section I. - ANSWER ✔ c. CSA B52.
,4. In order to ensure safe and continuous operation of a pressure reducing
valve, the valve station should have _________________.
Select one:
a. A safety valve on the high-pressure side
b. A bypass line, plus a safety valve and pressure gauge on the low-
pressure side
c. Thermometers on the inlet and outlet piping
d. A strainer immediately downstream of the valve - ANSWER ✔ b. A
bypass line, plus a safety valve and pressure gauge on the low-
pressure side
5. If the power dissipated by a resistor is 1.2 kW when supplied with 110 V,
the amperage will be _____ A. Select one:
a. 91.666
b. 19.006
c. 10.91
d. 132 - ANSWER ✔ c. 10.91
6. The inclined "U" tube manometer:
Select one:
a. Will measure pressure in MPa
b. Can only be used with mercury
c. Is more accurate than the "U" tube manometer
d. Is more difficult to read than the U-tube manometer - ANSWER ✔
c. Is more accurate than the "U" tube manometer
7. The water flow through a modular cast iron boiler system:
Select one:
a. Continuous through all modules
b. Connected in series
c. Intermittent, occurring only while the unit is firing
d. Done without the use of headers or manifolds - ANSWER ✔ a.
Continuous through all modules
8. On-off thermostats are equipped with:
Select one:
a. An open contact switch
b. Humidity compensation
, c. Two or more switches, operated in sequence
d. A potentiometer - ANSWER ✔ a. An open contact switch
9. In a balanced draft system, the forced draft fan is:
Select one:
a. Larger than the induced draft fan
b. Smaller than the induced draft fan
c. Designed to handle hot combustion gases
d. Used to maintain a slight negative pressure in the furnace - ANSWER
✔ b. Smaller than the induced draft fan
10.Current flow is:
Select one:
a. Increases as the applied voltage increases
b. Proportional to the resistance
c. Unaffected by resistance
d. Increases when applied voltage decreases - ANSWER ✔ a. Increases
as the applied voltage increases
11.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
12.Efficiency of an electrostatic precipitator is:
a. 75%
b. 60%
c. 90%
d. 99.9% - ANSWER ✔ d. 99%
13.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
14.4th 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
15.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
16.The following is true of a gate valve:
a. has less restriction in a line than a globe valve, is used to throttle flow
b. has less restriction in a line than a globe valve, 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 - ANSWER ✔ b. has less restriction in a line
than a globe valve, should be operated fully open or fully closed
17.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
18.Dissolved oxygen in condensate:
Select one:
a. Will cause waterside corrosion
b. Can cause scaling on the return lines
c. Is removed with amines
d. Necessitates the installation of a deaerator - ANSWER ✔ a. Will
cause waterside corrosion
19.A characteristic of mechanical draft is that the draft:
