Power Engineering - 4B5 Practice Questions and Answers Rated 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 in-
side, and closed up
a. Drained, thoroughly dried, have desiccant placed in-
b. Left with the water at normal working level but opened
side, and closed up
up to atmosphere
c. Left with the water at normal working level and pressur-
ized with air to 50 kPa
d. Filled completely with water and the vent left open to
atmosphere for expansion
For an alkaline boil out, a boiler is fired and maintained
under steam pressure for about:
a. 7 days c. 48 hours
b. 30 Days
c. 48 hours
d. 10 hours
Lock washers:
a. Prevent marring of the work surface
c. Reduce the chances of unwanted turning of the bolt or
b. Distribute the lock nut force
nut
c. Reduce the chances of unwanted turning of the bolt or
nut
d. Prevent the equipment from being dismantled
The actual movable range of a metric micrometer is:
a. one barrel rotation
d. 25 mm
b. adjustable using a jeweler's screwdriver
c. bigger on larger micrometers
d. 25 mm
,Steel mechanical fasteners that are commonly used in the
automotive industry and on plant machinery are classed
as:
b. Machine bolts
a. Carriage bolts
b. Machine bolts
c. Hexagon bolts
d. Self tapping pan bolts
To measure the small clearance between a valve tappet
and a cam lobe, is used.
a. An inside micrometer d. A feeler gauge
b. A scale ruler
c. A vernier caliper
d. A feeler gauge
A scattold should always be erected:
a. When the available stepladder would require standing
on the top step d. Plumb and level
b. Three feet above the work area
c. By a safety contractor
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
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
Prior to a worker entering the steam drum of an ott-line
boiler that is connected to a common, pressurized steam
header, the
, a. Header must be shut down and depressurized
b. Boiler Inspector must be informed before any work
occurs c. Main steam, blowdown and feedwater valves must be
c. Main steam, blowdown and feedwater valves must be closed, locked and tagged
closed, locked and tagged
d. Drum must be vented, the safety valve must be gagged,
and all ash and soot removed from the firebox
When using a step ladder, it is best to:
a. Not work higher than the top three rungs
a. Not work higher than the top three rungs
b. Tie ott while standing on the top platform
c. Have two co-workers hold the ladder steady
d. Secure the ladder with a rope
An eye that is made in a rope, using the proper number
and spacing of wire rope clips, will be as
strong as the rope itself.
a. 80%
a. 80%
b. twice
c. half
d. equally
The most commonly used acid for boiler cleaning is:
a. Sulphuric
b. Hydrochloric
b. Hydrochloric
c. Nitric
d. Sulphamic
The purpose of annealing boiler tube ends is to:
d. Soften the tube ends
a. Post heat the tube ends
A steam boiler that is to be shut down for a long period of
time should be:
a. Drained, thoroughly dried, have desiccant placed in-
side, and closed up
a. Drained, thoroughly dried, have desiccant placed in-
b. Left with the water at normal working level but opened
side, and closed up
up to atmosphere
c. Left with the water at normal working level and pressur-
ized with air to 50 kPa
d. Filled completely with water and the vent left open to
atmosphere for expansion
For an alkaline boil out, a boiler is fired and maintained
under steam pressure for about:
a. 7 days c. 48 hours
b. 30 Days
c. 48 hours
d. 10 hours
Lock washers:
a. Prevent marring of the work surface
c. Reduce the chances of unwanted turning of the bolt or
b. Distribute the lock nut force
nut
c. Reduce the chances of unwanted turning of the bolt or
nut
d. Prevent the equipment from being dismantled
The actual movable range of a metric micrometer is:
a. one barrel rotation
d. 25 mm
b. adjustable using a jeweler's screwdriver
c. bigger on larger micrometers
d. 25 mm
,Steel mechanical fasteners that are commonly used in the
automotive industry and on plant machinery are classed
as:
b. Machine bolts
a. Carriage bolts
b. Machine bolts
c. Hexagon bolts
d. Self tapping pan bolts
To measure the small clearance between a valve tappet
and a cam lobe, is used.
a. An inside micrometer d. A feeler gauge
b. A scale ruler
c. A vernier caliper
d. A feeler gauge
A scattold should always be erected:
a. When the available stepladder would require standing
on the top step d. Plumb and level
b. Three feet above the work area
c. By a safety contractor
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
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
Prior to a worker entering the steam drum of an ott-line
boiler that is connected to a common, pressurized steam
header, the
, a. Header must be shut down and depressurized
b. Boiler Inspector must be informed before any work
occurs c. Main steam, blowdown and feedwater valves must be
c. Main steam, blowdown and feedwater valves must be closed, locked and tagged
closed, locked and tagged
d. Drum must be vented, the safety valve must be gagged,
and all ash and soot removed from the firebox
When using a step ladder, it is best to:
a. Not work higher than the top three rungs
a. Not work higher than the top three rungs
b. Tie ott while standing on the top platform
c. Have two co-workers hold the ladder steady
d. Secure the ladder with a rope
An eye that is made in a rope, using the proper number
and spacing of wire rope clips, will be as
strong as the rope itself.
a. 80%
a. 80%
b. twice
c. half
d. equally
The most commonly used acid for boiler cleaning is:
a. Sulphuric
b. Hydrochloric
b. Hydrochloric
c. Nitric
d. Sulphamic
The purpose of annealing boiler tube ends is to:
d. Soften the tube ends
a. Post heat the tube ends
