ABSA 4th Class Part A Review-Fourth Class Power Engineer
Certification EXAM 2026-2027 LATEST UPDATED VERSION
QUESTIONS AND ANSWERS
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
c. For logic supervisory systems
d. For maintenance management - answer>>d. For maintenance management
_____________ is the internal resistance to an applied external force.
Select one:
a. Strain
b. Stress
c. Ultimate strength
d. Load - answer>>b. Stress
What are the three reservoirs of the carbon cycle?
Select one:
a. animals, oceans, atmosphere
b. rocks, plants, atmosphere
c. trees, animals, oceans
d. rocks, oceans, atmosphere - answer>>d. rocks, oceans, atmosphere
The Hartford Loop prevents the water in the boiler from:
Select one:
a. Exceeding the maximum temperature
b. Exceeding the highest safe level
c. Dropping below a safe level
Certification EXAM 2026-2027 LATEST UPDATED VERSION
QUESTIONS AND ANSWERS
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
c. For logic supervisory systems
d. For maintenance management - answer>>d. For maintenance management
_____________ is the internal resistance to an applied external force.
Select one:
a. Strain
b. Stress
c. Ultimate strength
d. Load - answer>>b. Stress
What are the three reservoirs of the carbon cycle?
Select one:
a. animals, oceans, atmosphere
b. rocks, plants, atmosphere
c. trees, animals, oceans
d. rocks, oceans, atmosphere - answer>>d. rocks, oceans, atmosphere
The Hartford Loop prevents the water in the boiler from:
Select one:
a. Exceeding the maximum temperature
b. Exceeding the highest safe level
c. Dropping below a safe level
