ABSA 4TH CLASS PART A REVIEW
EXAM QUESTIONS WITH CORRECT
SOLUTIONS||UPDATED 2026/2027
SYLLABUS||100% GUARANTEED
PASS||<<LATEST VERSION>>
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"
Which one of these statements is true?:
Select one:
a. The attitude of an injured worker has no impact on the outcome of his injury.
b. Financial costs of a workplace injury outweigh all other costs
c. A workplace injury can destroy an employee's self esteem
d. An injured worker usually causes his own injury. - ANSWER ✓ c. A workplace
injury can destroy an employee's self esteem
An unpredicted change in a plant process is called a/an:
Select one:
a. Disruption
b. Disturbance
c. Error
d. Malfunction - ANSWER ✓ b. Disturbance
The transfer of heat involving the movement of a fluid is defined as:
Select one:
a. Conduction
b. Convection
c. Radiation
d. Flux
e. Thermo-circulation - ANSWER ✓ b. Convection
A simple wheel and axle has a wheel diameter of 2.3m and an axle diameter of
92mm. If an effort of 26N is required to raise a mass of 16kg, what is the
efficiency of the machine?
Select one:
a. 2.46%
b. 95.3%
, c. 24.1%
d. 20.1%
Steam is - ANSWER ✓ c. 24.1%
Steam is
Select one:
a. superheated water
b. supersaturated water
c. vapourized water
d. moisture in the air - ANSWER ✓ c. vapourized water
Apparent power is the
Select one:
a. kW of power consumed
b. VA supplied to a reactive AC circuit
c. Power due to resistance in a circuit
d. Power recorded by a kWh meter. - ANSWER ✓ b. VA supplied to a reactive
AC circuit
Early watertube boilers had furnace walls constructed of brick. Modern furnaces
use ____________to form the furnace walls.
Select one:
a. Steel casing
b. Watertubes
c. Plastic insulation
d. Block insulation - ANSWER ✓ b. Watertubes
In a bottom-supported boiler, the steam drum is usually:
Select one:
a. Supported by an overhead girder arrangement
b. Supported by the water tubes
c. Supported by piers
d. Placed between the centre line of the unit - ANSWER ✓ b. Supported by the
water tubes
Run time totals, recorded by a computer, are commonly used:
Select one:
a. In graphic displays
b. For inventory control
EXAM QUESTIONS WITH CORRECT
SOLUTIONS||UPDATED 2026/2027
SYLLABUS||100% GUARANTEED
PASS||<<LATEST VERSION>>
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"
Which one of these statements is true?:
Select one:
a. The attitude of an injured worker has no impact on the outcome of his injury.
b. Financial costs of a workplace injury outweigh all other costs
c. A workplace injury can destroy an employee's self esteem
d. An injured worker usually causes his own injury. - ANSWER ✓ c. A workplace
injury can destroy an employee's self esteem
An unpredicted change in a plant process is called a/an:
Select one:
a. Disruption
b. Disturbance
c. Error
d. Malfunction - ANSWER ✓ b. Disturbance
The transfer of heat involving the movement of a fluid is defined as:
Select one:
a. Conduction
b. Convection
c. Radiation
d. Flux
e. Thermo-circulation - ANSWER ✓ b. Convection
A simple wheel and axle has a wheel diameter of 2.3m and an axle diameter of
92mm. If an effort of 26N is required to raise a mass of 16kg, what is the
efficiency of the machine?
Select one:
a. 2.46%
b. 95.3%
, c. 24.1%
d. 20.1%
Steam is - ANSWER ✓ c. 24.1%
Steam is
Select one:
a. superheated water
b. supersaturated water
c. vapourized water
d. moisture in the air - ANSWER ✓ c. vapourized water
Apparent power is the
Select one:
a. kW of power consumed
b. VA supplied to a reactive AC circuit
c. Power due to resistance in a circuit
d. Power recorded by a kWh meter. - ANSWER ✓ b. VA supplied to a reactive
AC circuit
Early watertube boilers had furnace walls constructed of brick. Modern furnaces
use ____________to form the furnace walls.
Select one:
a. Steel casing
b. Watertubes
c. Plastic insulation
d. Block insulation - ANSWER ✓ b. Watertubes
In a bottom-supported boiler, the steam drum is usually:
Select one:
a. Supported by an overhead girder arrangement
b. Supported by the water tubes
c. Supported by piers
d. Placed between the centre line of the unit - ANSWER ✓ b. Supported by the
water tubes
Run time totals, recorded by a computer, are commonly used:
Select one:
a. In graphic displays
b. For inventory control
