ABSA: 4th Class Part B – Power
Engineering Comprehensive Exam 5 |
Verified Answers| All Correct And
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 - Ans--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 - Ans--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 - Ans--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 - Ans--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 - Ans--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 - Ans--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 - Ans--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. - Ans--c
,A type of anti-friction bearing is the _____ .
Select one:
a. Journal bearing
b. Sleeve bearing
c. Ball bearing
d. Kingsbury - Ans--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 - Ans--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 - Ans--b
A material that is commonly used as a solid lubricant is:
Select one:
a. Tallow
b. Lime
c. Molybdenum disulfide
d. Sodium carbonate - Ans--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. - Ans--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 - Ans--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 - Ans--c
Which of the following is an example of a dissolved solid?
Select one:
a. Carbon dioxide
b. Oxygen
c. Sand
d. Magnesium sulphate - Ans--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
b. Radiant panel systems are lower in cost
c. Radiant panel heating systems provide less resistance to water flow
d. Radiant panel heating systems require less piping - Ans--a
The minimum DN size of the blowoff piping of a steam heating boiler is:
Select one:
Engineering Comprehensive Exam 5 |
Verified Answers| All Correct And
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 - Ans--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 - Ans--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 - Ans--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 - Ans--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 - Ans--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 - Ans--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 - Ans--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. - Ans--c
,A type of anti-friction bearing is the _____ .
Select one:
a. Journal bearing
b. Sleeve bearing
c. Ball bearing
d. Kingsbury - Ans--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 - Ans--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 - Ans--b
A material that is commonly used as a solid lubricant is:
Select one:
a. Tallow
b. Lime
c. Molybdenum disulfide
d. Sodium carbonate - Ans--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. - Ans--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 - Ans--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 - Ans--c
Which of the following is an example of a dissolved solid?
Select one:
a. Carbon dioxide
b. Oxygen
c. Sand
d. Magnesium sulphate - Ans--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
b. Radiant panel systems are lower in cost
c. Radiant panel heating systems provide less resistance to water flow
d. Radiant panel heating systems require less piping - Ans--a
The minimum DN size of the blowoff piping of a steam heating boiler is:
Select one:
