Power Engineering 4th Class - B5 exam with correct answers
Lock washers:
a. Prevent the equipment from being dismantled
b. Reduce the chances of unwanted turning of the bolt or nut
c. Distribute the lock nut force
d. Prevent marring of the work surface - CORRECT ANSWER??b
When a boiler is removed from service, it can be drained once the temperature reaches approximately:
a. room temperature
b. 50°C
c. 90°C
d. 70°C - CORRECT ANSWER??c
When storing a hacksaw:
a. flip the blade, so that the cutting surfaces are not exposed to damage
b. release the tension on the blade
c. the saw should be stored in a protective sheath
d. the blade should be removed - CORRECT ANSWER??b
What factor of safety should be used to determine the safe load for a new fibre rope?
a. two
b. the safe load for fibre rope cannot be calculated
,c. five
d. 1 - CORRECT ANSWER??c
During a wet layup, a water tank should be installed above the boiler and attached to the boiler vent
connection in order to:
a. Permit the injection of boiler chemicals.
b. Prevent air from entering the boiler water.
c. Keep the nitrogen cap from venting to the atmosphere
d. Provide pure water for rinsing the exterior of the boiler. - CORRECT ANSWER??b
A dressing tool is used to:
a. Fit a new handle into a hammer head
b. Clean the grooves of a file
c. Clean the measuring contact surfaces of a micrometer
d. Square the edges of a grinding wheel - CORRECT ANSWER??d
Stove bolt nuts can be:
a. Known as castle nuts
b. Self locking
c. Tapered threads
d. Square or hexagonal - CORRECT ANSWER??d
Air removal prior to a hydrostatic test
a. Is critical, because the air will compress during the test
b. Will prevent oxygen corrosion.
, c. Is done by adding oxygen scavenging chemicals to the test water.
d. Is done with a vacuum pump. - CORRECT ANSWER??a
The most commonly used acid for boiler cleaning is:
a. Sulphuric
b. Hydrochloric
c. Nitric
d. Sulphamic - CORRECT ANSWER??b
The top of a ladder should extend approximately _____ above the level of the upper landing to which it
provides access.
a. 1 rung
b. 1 m
c. 3 rungs
d. 0.5 m - CORRECT ANSWER??b
When the fireside of a boiler is opened up, locations of water leakage may be detected by:
a. Ultraviolet light
b. White dissolved solids left from water evaporation
c. Large rust nodules at the point of leakage
d. High pH boiler water running down the tubes - CORRECT ANSWER??b
For an alkaline boil out, a boiler is fired and maintained under steam pressure for about:
a. 7 days
b. 30 Days
Lock washers:
a. Prevent the equipment from being dismantled
b. Reduce the chances of unwanted turning of the bolt or nut
c. Distribute the lock nut force
d. Prevent marring of the work surface - CORRECT ANSWER??b
When a boiler is removed from service, it can be drained once the temperature reaches approximately:
a. room temperature
b. 50°C
c. 90°C
d. 70°C - CORRECT ANSWER??c
When storing a hacksaw:
a. flip the blade, so that the cutting surfaces are not exposed to damage
b. release the tension on the blade
c. the saw should be stored in a protective sheath
d. the blade should be removed - CORRECT ANSWER??b
What factor of safety should be used to determine the safe load for a new fibre rope?
a. two
b. the safe load for fibre rope cannot be calculated
,c. five
d. 1 - CORRECT ANSWER??c
During a wet layup, a water tank should be installed above the boiler and attached to the boiler vent
connection in order to:
a. Permit the injection of boiler chemicals.
b. Prevent air from entering the boiler water.
c. Keep the nitrogen cap from venting to the atmosphere
d. Provide pure water for rinsing the exterior of the boiler. - CORRECT ANSWER??b
A dressing tool is used to:
a. Fit a new handle into a hammer head
b. Clean the grooves of a file
c. Clean the measuring contact surfaces of a micrometer
d. Square the edges of a grinding wheel - CORRECT ANSWER??d
Stove bolt nuts can be:
a. Known as castle nuts
b. Self locking
c. Tapered threads
d. Square or hexagonal - CORRECT ANSWER??d
Air removal prior to a hydrostatic test
a. Is critical, because the air will compress during the test
b. Will prevent oxygen corrosion.
, c. Is done by adding oxygen scavenging chemicals to the test water.
d. Is done with a vacuum pump. - CORRECT ANSWER??a
The most commonly used acid for boiler cleaning is:
a. Sulphuric
b. Hydrochloric
c. Nitric
d. Sulphamic - CORRECT ANSWER??b
The top of a ladder should extend approximately _____ above the level of the upper landing to which it
provides access.
a. 1 rung
b. 1 m
c. 3 rungs
d. 0.5 m - CORRECT ANSWER??b
When the fireside of a boiler is opened up, locations of water leakage may be detected by:
a. Ultraviolet light
b. White dissolved solids left from water evaporation
c. Large rust nodules at the point of leakage
d. High pH boiler water running down the tubes - CORRECT ANSWER??b
For an alkaline boil out, a boiler is fired and maintained under steam pressure for about:
a. 7 days
b. 30 Days
