ABSA: 4th Class Part B -
Comprehensive Exam 5 Test
Questions Fully Solved 2026 Updated.
The groove that is cut in the top half in the lining of a shell bearing should not extend closer to
the ends than:
Select one:
a. 1.7 cm
b. 1.25 cm
c. 10 mm
d. 3 mm - Answer b
Temperature relief devices limit the temperature in domestic hot water systems to no more
than:
Select one:
a. 121°C
b. 99°C
c. 79°C
d. the system temperature set point - Answer b
During the Rinse stage when regenerating a sodium zeolite softener, the solution going to the
sewer contains:
Select one:
a. Calcium and magnesium ions
b. Sodium bicarbonates and sulphates
c. Sulphates and bicarbonates
d. Calcium sulphate - Answer a
The flow of water in a multi-zone hot water heating system is controlled by:
Select one:
a. Induction coils in each heating zone
,b. A circulating pump for each heating zone
c. Balancing valves
d. Diverter fittings - Answer b
When working on a platform it is important to:
Select one:
a. Notify the applicable government agency
b. Tie off to the scaffold
c. Warn people on the ground of overhead hazards
d. Always wear a lifeline harness - Answer c
Castle nuts are used:
Select one:
a. With a split pin or cotter pin
b. To hold shims in place
c. For locking square nuts in place
d. To simplify assembly and disassembly - Answer a
Flat glass water gauges are often used because:
Select one:
a. They are more compact
b. They can withstand higher pressures than tubular gauge glasses
c. A light can be installed behind them
d. It is easier to see the level - Answer b
How often should the desiccant be checked during a dry layup?
Select one:
a. Daily.
b. Annually.
c. Bi-weekly to monthly.
d. Semi-annually. - Answer c
,A type of anti-friction bearing is the _____ .
Select one:
a. Journal bearing
b. Sleeve bearing
c. Ball bearing
d. Kingsbury - Answer c
A closed cycle gas turbine:
Select one:
a. Burns fuel with spent exhaust gas.
b. Recycles the same working fluid
c. Is the most common type of gas turbine
d. Does not need a combustion chamber - Answer b
A single-pole scaffold:
Select one:
a. Need not be plumb, but must be level
b. Is partially supported by a building
c. Is often referred to as the pogo platform
d. Is prohibited from use by Workplace Safety and Health - Answer b
A material that is commonly used as a solid lubricant is:
Select one:
a. Tallow
b. Lime
c. Molybdenum disulfide
d. Sodium carbonate - Answer c
One of the main purposes of an external boiler inspection is to:
Select one:
, a. observe and assess boiler operation and maintenance practices.
b. inspect all auxiliary equipment and pressure vessels.
c. thoroughly assess the water treatment program.
d. thoroughly examine the boiler waterside. - Answer a
Corrugations in outside aluminum storm water piping are required to:
Select one:
a. Permit expansion of the aluminum
b. Allow flexibility to prevent wind damage
c. Decrease potential for blockage
d. Increase the flow of storm water - Answer a
If the packing gland of a centrifugal water pump is leaking too much:
Select one:
a. Throttle the suction valve a little
b. Tighten up the gland as far as is possible
c. Tighten up the gland but permit a slight amount of leakage
d. Tighten up the gland until all leakage has been stopped - Answer c
Which of the following is an example of a dissolved solid?
Select one:
a. Carbon dioxide
b. Oxygen
c. Sand
d. Magnesium sulphate - Answer d
One of the advantages of the radiant panel hot water heating system over the conventional
heating system is:
Select one:
a. Radiant heat panels distribute heat more evenly throughout the room
Comprehensive Exam 5 Test
Questions Fully Solved 2026 Updated.
The groove that is cut in the top half in the lining of a shell bearing should not extend closer to
the ends than:
Select one:
a. 1.7 cm
b. 1.25 cm
c. 10 mm
d. 3 mm - Answer b
Temperature relief devices limit the temperature in domestic hot water systems to no more
than:
Select one:
a. 121°C
b. 99°C
c. 79°C
d. the system temperature set point - Answer b
During the Rinse stage when regenerating a sodium zeolite softener, the solution going to the
sewer contains:
Select one:
a. Calcium and magnesium ions
b. Sodium bicarbonates and sulphates
c. Sulphates and bicarbonates
d. Calcium sulphate - Answer a
The flow of water in a multi-zone hot water heating system is controlled by:
Select one:
a. Induction coils in each heating zone
,b. A circulating pump for each heating zone
c. Balancing valves
d. Diverter fittings - Answer b
When working on a platform it is important to:
Select one:
a. Notify the applicable government agency
b. Tie off to the scaffold
c. Warn people on the ground of overhead hazards
d. Always wear a lifeline harness - Answer c
Castle nuts are used:
Select one:
a. With a split pin or cotter pin
b. To hold shims in place
c. For locking square nuts in place
d. To simplify assembly and disassembly - Answer a
Flat glass water gauges are often used because:
Select one:
a. They are more compact
b. They can withstand higher pressures than tubular gauge glasses
c. A light can be installed behind them
d. It is easier to see the level - Answer b
How often should the desiccant be checked during a dry layup?
Select one:
a. Daily.
b. Annually.
c. Bi-weekly to monthly.
d. Semi-annually. - Answer c
,A type of anti-friction bearing is the _____ .
Select one:
a. Journal bearing
b. Sleeve bearing
c. Ball bearing
d. Kingsbury - Answer c
A closed cycle gas turbine:
Select one:
a. Burns fuel with spent exhaust gas.
b. Recycles the same working fluid
c. Is the most common type of gas turbine
d. Does not need a combustion chamber - Answer b
A single-pole scaffold:
Select one:
a. Need not be plumb, but must be level
b. Is partially supported by a building
c. Is often referred to as the pogo platform
d. Is prohibited from use by Workplace Safety and Health - Answer b
A material that is commonly used as a solid lubricant is:
Select one:
a. Tallow
b. Lime
c. Molybdenum disulfide
d. Sodium carbonate - Answer c
One of the main purposes of an external boiler inspection is to:
Select one:
, a. observe and assess boiler operation and maintenance practices.
b. inspect all auxiliary equipment and pressure vessels.
c. thoroughly assess the water treatment program.
d. thoroughly examine the boiler waterside. - Answer a
Corrugations in outside aluminum storm water piping are required to:
Select one:
a. Permit expansion of the aluminum
b. Allow flexibility to prevent wind damage
c. Decrease potential for blockage
d. Increase the flow of storm water - Answer a
If the packing gland of a centrifugal water pump is leaking too much:
Select one:
a. Throttle the suction valve a little
b. Tighten up the gland as far as is possible
c. Tighten up the gland but permit a slight amount of leakage
d. Tighten up the gland until all leakage has been stopped - Answer c
Which of the following is an example of a dissolved solid?
Select one:
a. Carbon dioxide
b. Oxygen
c. Sand
d. Magnesium sulphate - Answer d
One of the advantages of the radiant panel hot water heating system over the conventional
heating system is:
Select one:
a. Radiant heat panels distribute heat more evenly throughout the room
