4TH CLASS ABSA EXAM EXAM SCRIPT 2026
COMPREHENSIVE QUESTIONS AND
SOLUTIONS GRADED A+
◉ Orifice plates, venturi tubes and nozzles belong to the group
called:
Select one:
a. Flow meters
b. Pressure meters
c. Head meters
d. Analog meters. Answer: a. Flow meters
◉ The distribution pipe that injects feedwater inside a boiler:
Select one:
a. Must be made of at least schedule 80 pipe
b. Is arranged to reduce thermal shock in the drum
c. Introduces the feedwater against the radiant heating surfaces of
the boiler
d. Improves the separation of steam and water. Answer: b. Is
arranged to reduce thermal shock in the drum
,◉ Which one of the following fusion welding is a totally manual
process?
Select one:
a. oxy-fuel
b. submerged arc
c. gas metal arc
d. gas tungsten arc. Answer: a. oxy-fuel
◉ A sensing element responds to the value of the
Select one:
a. Controller
b. Recorder
c. Control valve
d. Measured variable. Answer: d. Measured variable
◉ Determine the magnitude and direction of resultant of the
following concurrent coplanar forces - 10N at 32° east of north, 35N
at 50° east of north, 25N at 72° east of north, and 85N at 40° east of
south
Select one:
a. 70N at 56° east of north
b. 45N at 44° east of north
c. 196N at 87° east of south
,d. 114N at 77° east of south. Answer: d. 114N at 77° east of south
◉ A pressure gauge on a section IV boiler is :
Select one:
a. Graduated to a maximum setting of double the PRV setting
b. Graduated to a maximum setting or double the MAWP
c. Graduated to no less than 30 psi (200 kPa), nor more than 60 psi
(414 kPa)
d. Graduated to between 1.5 and 2 times the PRV setting. Answer: c.
graduated to no less than 30 psi (200 kPa), nor more than 60 psi
(414 kPa)
◉ In a Plant Line Trace sketch:
Select one:
a. All valves are shown
b. only major features are shown
c. All process flows are shown
d. pipe sizes are shown. Answer: b. only major features are shown
◉ Heat that brings about a change of state:
Select one:
a. Can be sensed by a thermometer
, b. Is called sensible heat
c. Causes a change of temperature
d. Is called latent heat
e. Is called specific heat. Answer: d. Is called latent heat
◉ Tie breakers are used to:
Select one:
a. Allow the interconnection of two power sources without placing
them in parallel
b. Break the circuit in case of overload
c. Protect the transformer from the power source
d. Protect the plant service bus from the power source. Answer: a.
Allow the interconnection of two power sources without placing
them in parallel
◉ What type of fire should be put out with water?
Select one:
a. Class "A"
b. Class "B"
c. Class "C"
d. Class "A", "B", and "C". Answer: a. Class "A"
COMPREHENSIVE QUESTIONS AND
SOLUTIONS GRADED A+
◉ Orifice plates, venturi tubes and nozzles belong to the group
called:
Select one:
a. Flow meters
b. Pressure meters
c. Head meters
d. Analog meters. Answer: a. Flow meters
◉ The distribution pipe that injects feedwater inside a boiler:
Select one:
a. Must be made of at least schedule 80 pipe
b. Is arranged to reduce thermal shock in the drum
c. Introduces the feedwater against the radiant heating surfaces of
the boiler
d. Improves the separation of steam and water. Answer: b. Is
arranged to reduce thermal shock in the drum
,◉ Which one of the following fusion welding is a totally manual
process?
Select one:
a. oxy-fuel
b. submerged arc
c. gas metal arc
d. gas tungsten arc. Answer: a. oxy-fuel
◉ A sensing element responds to the value of the
Select one:
a. Controller
b. Recorder
c. Control valve
d. Measured variable. Answer: d. Measured variable
◉ Determine the magnitude and direction of resultant of the
following concurrent coplanar forces - 10N at 32° east of north, 35N
at 50° east of north, 25N at 72° east of north, and 85N at 40° east of
south
Select one:
a. 70N at 56° east of north
b. 45N at 44° east of north
c. 196N at 87° east of south
,d. 114N at 77° east of south. Answer: d. 114N at 77° east of south
◉ A pressure gauge on a section IV boiler is :
Select one:
a. Graduated to a maximum setting of double the PRV setting
b. Graduated to a maximum setting or double the MAWP
c. Graduated to no less than 30 psi (200 kPa), nor more than 60 psi
(414 kPa)
d. Graduated to between 1.5 and 2 times the PRV setting. Answer: c.
graduated to no less than 30 psi (200 kPa), nor more than 60 psi
(414 kPa)
◉ In a Plant Line Trace sketch:
Select one:
a. All valves are shown
b. only major features are shown
c. All process flows are shown
d. pipe sizes are shown. Answer: b. only major features are shown
◉ Heat that brings about a change of state:
Select one:
a. Can be sensed by a thermometer
, b. Is called sensible heat
c. Causes a change of temperature
d. Is called latent heat
e. Is called specific heat. Answer: d. Is called latent heat
◉ Tie breakers are used to:
Select one:
a. Allow the interconnection of two power sources without placing
them in parallel
b. Break the circuit in case of overload
c. Protect the transformer from the power source
d. Protect the plant service bus from the power source. Answer: a.
Allow the interconnection of two power sources without placing
them in parallel
◉ What type of fire should be put out with water?
Select one:
a. Class "A"
b. Class "B"
c. Class "C"
d. Class "A", "B", and "C". Answer: a. Class "A"
