Energy plant Maintenance Flashcards
Lock washers:
Select one:
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
c. Reduce the chances of unwanted turning of the bolt or nut
The external inspection of a boiler:
Select one:
a. may include ensuring the pressure relief valves are the correct setting and capacity
b. may include making sure the furnace refractory is in order
c. may include making sure the exterior of the tubes are in good condition
d. must be done after the boiler has been drained
a. may include ensuring the pressure relief valves are the correct setting and capacity
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.
a. observe and assess boiler operation and maintenance practices.
For an alkaline boil out, a boiler is fired and maintained under steam pressure for about: Select one: a. 7 days b. 30 Days c. 48 hours d. 10 hours
c. 48 hours
In order to prevent a rope from untwisting under load:
Select one:
a. It should be moistened
b. Iit should have thimbles installed on the ends
c. It has counteracting left-handed and right-handed twists
d. Each end requires “whipping”
c. It has counteracting left-handed and right-handed twists
A steam boiler that is to be shut down for a long period of time should be:
Select one:
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
a. Drained, thoroughly dried, have desiccant placed inside, and closed up
The point of a properly ground drill bit should be: Select one: a. 35° b. 78° c. 118° d. 135°
c. 118°
Which of the following valves is locked or tagged open when preparing a boiler for internal inspection?
Select one:
a. bottom blowoff
b. non-return drain
c. continuous blowdown
d. header isolation
b. non-return drain
The packing gland of a hot water boiler circulating pump should have some leakage:
Select one:
a. To prevent the packing from drying out.
b. So that the shaft sleeve will wear instead of the shaft.
c. To allow air to exit the pump, so the pump does not lose its prime.
d. So the operator can tell if the sealing water is turned on.
a. To prevent the packing from drying out.
The recommended inspection procedures for a power boiler are outlined in the:
Select one:
a. CSA B51 Boiler, Pressure Vessel and Pressure Piping Code
b. ANSI B31.1 Power Piping Code
c. ASME Boiler and Pressure Vessel Code, Section I
d. ASME Boiler and Pressure Vessel Code, Section VII
d. ASME Boiler and Pressure Vessel Code, Section VII
Wire rope classified as 8 x 12 means it has:
Select one:
a. A factor of safety of 8 and is 12 strands
b. A factor of safety of 12 and is 8 wires per strand
c. 8 strands with 12 wires per strand
d. 8 strands containing 12 yarns each
c. 8 strands with 12 wires per strand
When joining two ropes of different diameters we use a: Select one: a. braiding b. Sheet bend c. Figure eight knot d. Sheep shank
b. Sheet bend
What pressure is applied to a boiler during a hydrostatic test?
Select one:
a. 1.5 times the setting of the safety valve.
b. 1.5 times the maximum allowable working pressure.
c. Design pressure.
d. 2 times the setting of the lowest set safety valve.
b. 1.5 times the maximum allowable working pressure.
Prior to a worker entering the steam drum of an off-line boiler that is connected to a common, pressurized steam header, the
Select one:
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 closed, locked and tagged
d. drum must be vented, the safety valve must be gagged, and all ash and soot removed from the firebox
c. main steam, blowdown and feedwater valves must be closed, locked and tagged
Copper sulphate may be used: Select one: a. As a thread cutting fluid b. For lubricating very fine threads such as those in a micrometer c. Coating tools to prevent rusting d. As a marking or layout material
d. As a marking or layout material
Channels or flutes are: Select one: a. types of wrenches b. parts of a die c. types of punches d. gaps in a tap for chips
d. gaps in a tap for chips
When a boiler is removed from service, it can be drained once the temperature reaches approximately: Select one: a. room temperature b. 50°C c. 90°C d. 70°C
c. 90°C
It is recommended that a new boiler be shut down, drained, opened up, flushed out and inspected after the first \_\_\_\_\_\_\_ \_\_\_\_\_\_\_ of operation. Select one: a. Two weeks b. Three months c. Six days d. Three days
b. Three months
When filing cast iron:
Select one:
a. Start with the bastard cut file
b. use cutting oil to prevent heat and loss of hardness
c. Start with a smooth cut file
d. Add grinding compound to the filing surface
a. Start with the bastard cut file
Machine bolts are commonly supplied with: Select one: a. Pan heads b. Oval heads c. Hexagon heads d. Square heads
c. Hexagon heads
A tube beading tool is used: Select one: a. On water tube boilers b. On fire tube boilers c. To fasten the stays in the tube sheet d. To unfasten fire tubes from the tube sheet.
b. On fire tube boilers
Air removal prior to a hydrostatic test:
Select one:
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.
a. Is critical, because the air will compress during the test
Hand taps are usually made in sets of three called: Select one: a. SAE, ISO, Metric b. Rough, coarse, and fine c. Taper, plug, and bottoming d. Primary, secondary, and finishing
c. Taper, plug, and bottoming
A strand of fibre rope
Select one:
a. Is wound around 19 others to form a full size rope
b. Will un-twist if subjected to a heavy load
c. Is the part melted to prevent unravelling
d. Is composed of yarns with a left-handed twist
d. Is composed of yarns with a left-handed twist
One of the legal responsibilities of the engineer during an inspection is:
Select one:
a. To notify the Workers’ Compensation Board of the inspection
b. Point out any known or suspected defects to the inspector
c. To have at least two staff members present at all times
d. To be in possession of an inspection certificate
b. Point out any known or suspected defects to the inspector
The top of a ladder should extend approximately \_\_\_\_\_ above the level of the upper landing to which it provides access. Select one: a. 3 rungs b. 0.5 m c. 1 m d. 1 rung
c. 1 m
A dressing tool is used to: Select one: a. Square the edges of a grinding wheel b. Clean the measuring contact surfaces of a micrometer c. Clean the grooves of a file d. Fit a new handle into a hammer head
a. Square the edges of a grinding wheel
Steel mechanical fasteners that are commonly used in the automotive industry and on plant machinery are classed as: Select one: a. Carriage bolts b. Machine bolts c. Hexagon bolts d. Self tapping pan bolts
b. Machine bolts
Chalk or \_\_\_\_\_\_\_\_ may be used to rub on the surface of rough castings as a marking material. Select one: a. wax b. layout ink c. soap stone d. blue vitriol
c. soap stone
Chain hoists are designed: Select one: a. For horizontal use b. With the top hook as the strongest c. With a very low mechanical advantage d. For use when "choking" the load to be lifted
b. With the top hook as the strongest
When the fireside of a boiler is opened up, locations of water leakage may be detected by:
Select one:
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
b. White dissolved solids left from water evaporation
When two or more sling eyes are used when lifting an object, they should be:
Select one:
a. Of equal strength
b. slid through each other in choker fashion
c. Held in a shackle
d. Fastened with a wire rope clip
Held in a shackle
Which of the following valves is locked closed when preparing a boiler for internal inspection?
Select one:
a. feedwater drain
b. non-return drain
c. drum vent
d. bottom blowoff
d. bottom blowoff
A ball peen hammer is sometimes called a: Select one: a. Carpenter’s hammer b. Machinist’s hammer c. Mechanic’s hammer d. Millwright’s hammer
b. Machinist’s hammer
When shutting down a boiler for internal cleaning:
Select one:
a. Shut down the boiler, then fill it completely with chemically treated water
b. Shut off the fire. Then, drain the boiler while it is hot, open it up, and flush it
c. Allow the boiler to cool. Then drain it, open it up, and flush it
d. Let it stand for a couple of days, then drain it
c. Allow the boiler to cool. Then drain it, open it up, and flush it
Stove bolt nuts can be: Select one: a. Square or hexagonal b. Tapered threads c. Self locking d. Known as castle nuts
a. Square or hexagonal
Castle nuts are used: Select one: a. To simplify assembly and disassembly b. To hold shims in place c. For locking square nuts in place d. With a split pin or cotter pin
d. With a split pin or cotter pin
The knot that forms a loop that will not slip or jam is the: Select one: a. Square or reef knot b. Figure eight c. Sheet bend d. Bowline
d. Bowline
The actual movable range of a metric micrometer is:
Select one:
a. one barrel rotation
b. adjustable using a jeweler’s screwdriver
c. bigger on larger micrometers
d. 25 mm
d. 25 mm
A tap with the marking M4 is a:
Select one:
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
b. Metric thread, 4 mm nominal diameter tap
