Power Engineering - 4B5 Practice
Exam Questions & Answers (Grade
A+)
A steam boiler that is to be shut down for a long period of time
should be:
a. Drained, thoroughly dried, have desiccant placed inside, and
closed up
b. Left with the water at normal working level but opened up to
atmosphere
c. Left with the water at normal working level and pressurized with
air to 50 kPa
d. Filled completely with water and the vent left open to
atmosphere for expansion -
correct answer ✅a. Drained, thoroughly dried, have desiccant
placed inside, and closed up
For an alkaline boil out, a boiler is fired and maintained under
steam pressure for about:
a. 7 days
b. 30 Days
c. 48 hours
,Power Engineering - 4B5 Practice
Exam Questions & Answers (Grade
A+)
d. 10 hours -
correct answer ✅c. 48 hours
Lock washers:
a. Prevent marring of the work surface
b. Distribute the lock nut force
c. Reduce the chances of unwanted turning of the bolt or nut
d. Prevent the equipment from being dismantled -
correct answer ✅c. Reduce the chances of unwanted turning of
the bolt or nut
The actual movable range of a metric micrometer is:
a. one barrel rotation
b. adjustable using a jeweler's screwdriver
c. bigger on larger micrometers
d. 25 mm -
correct answer ✅d. 25 mm
,Power Engineering - 4B5 Practice
Exam Questions & Answers (Grade
A+)
Steel mechanical fasteners that are commonly used in the
automotive industry and on plant machinery are classed as:
a. Carriage bolts
b. Machine bolts
c. Hexagon bolts
d. Self tapping pan bolts -
correct answer ✅b. Machine bolts
To measure the small clearance between a valve tappet and a cam
lobe, _________ is used.
a. An inside micrometer
b. A scale ruler
c. A vernier caliper
d. A feeler gauge -
correct answer ✅d. A feeler gauge
, Power Engineering - 4B5 Practice
Exam Questions & Answers (Grade
A+)
A scaffold should always be erected:
a. When the available stepladder would require standing on the top
step
b. Three feet above the work area
c. By a safety contractor
d. Plumb and level -
correct answer ✅d. Plumb and level
A tap with the marking M4 is a:
a. High-strength alloy steel tap
b. Metric thread, 4 mm nominal diameter tap
c. Metric thread, 4 cm nominal diameter tap
d. Metric thread with a 4 tooth per mm pitch -
correct answer ✅b. Metric thread, 4 mm nominal diameter tap
Prior to a worker entering the steam drum of an off-line boiler that
is connected to a common, pressurized steam header, the
Exam Questions & Answers (Grade
A+)
A steam boiler that is to be shut down for a long period of time
should be:
a. Drained, thoroughly dried, have desiccant placed inside, and
closed up
b. Left with the water at normal working level but opened up to
atmosphere
c. Left with the water at normal working level and pressurized with
air to 50 kPa
d. Filled completely with water and the vent left open to
atmosphere for expansion -
correct answer ✅a. Drained, thoroughly dried, have desiccant
placed inside, and closed up
For an alkaline boil out, a boiler is fired and maintained under
steam pressure for about:
a. 7 days
b. 30 Days
c. 48 hours
,Power Engineering - 4B5 Practice
Exam Questions & Answers (Grade
A+)
d. 10 hours -
correct answer ✅c. 48 hours
Lock washers:
a. Prevent marring of the work surface
b. Distribute the lock nut force
c. Reduce the chances of unwanted turning of the bolt or nut
d. Prevent the equipment from being dismantled -
correct answer ✅c. Reduce the chances of unwanted turning of
the bolt or nut
The actual movable range of a metric micrometer is:
a. one barrel rotation
b. adjustable using a jeweler's screwdriver
c. bigger on larger micrometers
d. 25 mm -
correct answer ✅d. 25 mm
,Power Engineering - 4B5 Practice
Exam Questions & Answers (Grade
A+)
Steel mechanical fasteners that are commonly used in the
automotive industry and on plant machinery are classed as:
a. Carriage bolts
b. Machine bolts
c. Hexagon bolts
d. Self tapping pan bolts -
correct answer ✅b. Machine bolts
To measure the small clearance between a valve tappet and a cam
lobe, _________ is used.
a. An inside micrometer
b. A scale ruler
c. A vernier caliper
d. A feeler gauge -
correct answer ✅d. A feeler gauge
, Power Engineering - 4B5 Practice
Exam Questions & Answers (Grade
A+)
A scaffold should always be erected:
a. When the available stepladder would require standing on the top
step
b. Three feet above the work area
c. By a safety contractor
d. Plumb and level -
correct answer ✅d. Plumb and level
A tap with the marking M4 is a:
a. High-strength alloy steel tap
b. Metric thread, 4 mm nominal diameter tap
c. Metric thread, 4 cm nominal diameter tap
d. Metric thread with a 4 tooth per mm pitch -
correct answer ✅b. Metric thread, 4 mm nominal diameter tap
Prior to a worker entering the steam drum of an off-line boiler that
is connected to a common, pressurized steam header, the
