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Millwright > Millwright > Flashcards

Millwright Flashcards

1
Q

Wire rope used to hoist personal breaking strength is 6000 lb. What is the max you can lift?

A

10:1=600 lbs

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2
Q

There are 4 rollers moving in horizontal load. Weight is 48 tons. What is the minimum capacity allowed for 2 rollers?

A

48 Ton

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3
Q

Where do you measure a wire rope?

A

Largest diameter

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4
Q

Length of wire rope required to make 4 dead wraps over a drum?

A

Pie times D times 4

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5
Q

Shackle has bad threads, what do you do?

A

Take it out of service

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6
Q

Sling has acid damage, what do you do?

A

Take it out of service

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7
Q

What do you attach 3 or more slings being used to choke a pipe to?

A

A shackle on hook

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8
Q

What are scaffold planks made out of?

A

Rough fir

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9
Q

What is area of crane outrigger block?

A

3:1 Take area of outrigger pad times 3

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10
Q

What do you use to check for cracks on Aluminum fan blade?

A

Dye penetrant

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11
Q

Belt on a crown pulley is out of alignment. What do you do?

A

Increase the crown

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12
Q

Bridge on overhead crane is misaligned. What do you do?

A

Align rails

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13
Q

When changing hacksaw blade, what steps would you take?

A

Loosen nut, install blades tooth facing forward, retighten

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14
Q

On a new commissioned system, what is the first thing you do?

A

Bleed the lines

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15
Q

A fully loaded flat belt is running off alignment, what do you do?

A

Re-adjust load to the centre of belt

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16
Q

A bucket conveyor is jacking and dropping load, what is the problem?

A

Missing tooth on drive sprocket

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17
Q

A secured pump mount, motor running high.

A

Follow manufacturers specs.

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18
Q

Before coupling new installed motor to pump, what do you do?

A

Check motor rotation, then couple

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19
Q

Compressor is run up, what do you re- torque?

A

Cylinder head cover.

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20
Q

A v-belt is turning over in its sheave. What do you do?

A

Replace sheave.

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21
Q

A fluid coupling is slipping, what do you do?

A

Add oil, check temperature.

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22
Q

Store a cable jack…

A

Separately and coil rope.

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23
Q

Know hand signal….

A

Boom up, hold the load

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24
Q

Know hand signal….

A

Extend boom.

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25
Q

Wedge socket is used to?

A

Change out line frequently.

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26
Q

How many turns do you open an acetylene valve?

A

1 to 1 1/2 turns

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27
Q

Where do you add lubricant on roller chain?

A

Between link plates.

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28
Q

What does blue smoke coming out of exhaust pipe of engine indicate?

A

Worn piston rings.

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29
Q

You have uneven wear on a friction clutch, what is the problem?

A

Misalignment.

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30
Q

When cutting a steal, what flame do you use?

A

Neutral.

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31
Q

A pump when shut off is not staying primed, what do you check?

A

Foot valve.

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32
Q

When checking for pipe strain, where do you put your dial?

A

Discharge flange.

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33
Q

A tank is sitting unevenly on concrete, how do align permanently?

A

Shim then grout.

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34
Q

A pump produces 12 gpm, the reservoir tank only holds 9 gallons. The pump is overheating, what is the problem?

A

The tank is too small for the pump.

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35
Q

To prevent a load from rotating on you during a lift, what would you use?

A

A tagline.

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36
Q

A hydraulic fitting is leaking, what is cause.

A

Damaged ferrule fitting.

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37
Q

A fixed bearing on a pump is located where?

A

On the driver side.

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38
Q

A tank collapses inward while draining fluid. What is the cause?

A

Faulty or clogged vent.

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39
Q

When installing a filter on a hydraulic system, put it….

A

Upstream of pump inlet.

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40
Q

PSV on compressor is popping, why?

A

High system pressure

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41
Q

You are told to level .050 shim at 18.” How many shims at 6’?

A

.050 divided by 18 * 72”=.2

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42
Q

What is the maximum allowed chain slack?

A

2%

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43
Q

A double stage reciprocating compressor oil is changed and is still overheating. Why?

A

Dirty inter cooler fins

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44
Q

When welding a long piece, how do you weld?

A

Stager weld and start welding from centre and work outward.

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45
Q

Hydraulic cylinder when retracting is hammering to the bottom. What would you do.

A

Use bigger cushion on cap end.

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46
Q

Leaking gas charged accumulator. What would you do?

A

Change the bladder.

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47
Q

Scribing 30” diameter circle, what would you use and how do you set it?

A

Use a trammel and set it to the radius.

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48
Q

Weight on 180 degree apart on shaft is?

A

Couple imbalance.

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49
Q

Coupling on motor and pump is open in the bottom and touching on the top, where would you add your shims?

A

Add shims on the front side of the motor.

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50
Q

An eye wash station is empty, what would you refill it with?

A

Potable water.

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51
Q

How do you store a new bearing?

A

Leave it in the package and store it in dust free environment.

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52
Q

What is the artificial respiration dealing with stationary engine?

A

Air is forced into engine

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53
Q

What controls the collapse of the primary field in the coil on an electronic ignition system?

A

Transistors

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54
Q

7:1 compression ratio, what is most likely causes of preignition?

A

Carbon deposits glowing red cause of detonation=low octane levels.

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55
Q

On a 4 cycle engine, intake valve opens + closes once while the crankshaft turns how many degrees.

A

720 degrees

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56
Q

What does a magneto ignition system consist of?

A

Coils(transformer), spark plug, generates its own power.

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57
Q

What is a micron?

A

Millionth of a meter .001 mm

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58
Q

Excessive crankshaft deflection will most likely cause?

A

Broken crank, or fatigue failure.

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59
Q

Propane and most gas carbs use a?

A

Spray bar or nozzle.

60
Q

On a gasoline carb how is the amount of gas delivery controlled?

A

(Butterfly valve) throttle valve

61
Q

What is the turbine called that has H.P. & L.P section on separate shafts?

A

Cross compound.

62
Q

This component is a special soft ply between the top cover and the carcass to reduce impact damage to the carcass?

A

Breakers

63
Q

Best arrangement for setscrews?

A

90 degrees apart

64
Q

Wear rings are used to do what on a single suction overhung pump?

A

Prevent recirculation to intake from suction.

65
Q

Balance holes are used on what kind of pump?

A

Centrifugal radial( open, semi, closed)

66
Q

In a 2 stage recipe compressor, discharge pressure cannot be maintained because of what?

A

Leaking exhaust valves.

67
Q

High intercooler pressure cannot be maintained of what?

A

Leaking intake on second stage.

68
Q

E6010, type of first papa action?

A

Short whip.

69
Q

Aeration in a hydraulic tank is caused by what?

A

Low oil level, leaking intake fitting, leaking pump seal, turbulence in tank.

70
Q

Power plant combustor to the turbine is connected how?

A

Transition piece

71
Q

Gas turbine, highest pressure is where?

A

Diffuser

72
Q

Chain rides at the tips of the sprocket, what is the problem?

A

Chain stretched.

73
Q

To camber a chain means what?

A

Create crest on bottom of chain.

74
Q

Hydraulic pump checking, what 3 tools are needed?

A

Pressure gauge, flow meter, rpm tool

75
Q

Quenching quickest method?

A

Water

76
Q

Phase is measured by what?

A

Strobe light.

77
Q

High vibration reading after start up, why?

A

Misalignment

78
Q

Diesel misfire caused by what?

A

Bad injector

79
Q

Black exhaust smoke in diesel indicates what?

A

Too much fuel (too rich)

80
Q

Oil darkens from what?

A

Oxidation

81
Q

What happens when a balanced spool valve if the oriface is plugged?

A

It will dump

82
Q

High amp draw on vacuum blower. Amperage drops because?

A

Load.

83
Q

Safety factor for personnel lifting?

A

10:1

84
Q

Type of steel for tools?

A

Chromium vandelium

85
Q

Over speed trip is mounted on what?

A

Shaft.

86
Q

What happens in a face to back angular contact set up?

A

Controls thrust in only one direction.

87
Q

Setting a tapered roller bearing what is the clearance?

A

1/3 total clearance.

88
Q

Most turbine erosion takes place where in a steam turbine?

A

L.P.

89
Q

Large blades are found where in a turbine?

A

L.P.

90
Q

Class of extinguisher for sawdust?

A

Class A.

91
Q

What part on a flexible steel grid coupling wears out first?

A

Steel grid.

92
Q

Step up voltage device is called?

A

Transformers

93
Q

Voltage is like pressure in hydraulics so we call the voltage?

A

Electrical pressure.

94
Q

Amperage should be checked how?

A

In the circuit.

95
Q

Voltage should be checked where?

A

E=I*R

96
Q

Centrifugal blowers or compressor, control output is controlled by what?

A

Inlet throttling

97
Q

Identify correct mounting of wire rope clips on wire thimble.

A

Saddle on live line.

98
Q

Emergency blow down valves prevent?

A

Over pressuring system.

99
Q

What does large diameter steam blading allow for?

A

High volume of steam.

100
Q

What is used to help prevent steam leakage from blade sections?

A

Shrouding

101
Q

Lacing is used in what section?

A

L.P. Section.

102
Q

Labyrinth seals seal on the principle of?

A

Brunellies principal, turbulent, knife edges.

103
Q

Carbon rings are machined because they?

A

Fit to very close tolerances?

104
Q

Spherical bearings used on turbines to?

A

Compensate for sag on shaft?

105
Q

For expansion on turbines sliding dovetail are used?

A

On rotor for holding reaction blades.

106
Q

Name for stationary blades?

A

Nozzles.

107
Q

What do the moving blades of a turbine connect to?

A

Disc or drum.

108
Q

The transition piece connects the inner lines of the power plant combustor to?

A

Turbine, connects combustor chamber to turbine.

109
Q

S.A.V. Is closed by?

A

Governor

110
Q

Condensor in the turbine allows steam to perform more work by reducing pressure. True or false?

A

True, more efficient.

111
Q

If you get fluctuating readings when you first start, wait for readings to settle

A

Hunting

112
Q

Drive belt vibrations amplitude is most likely the highest in line with?

A

Sheaves, direction of belt is pulling on sheaves.

113
Q

Vibration signal is also known as?

A

Signature or signal.

114
Q

When taking vibration readings on bearings, the readings should be taken on?

A

Acceleration horizontal, vertical, axial.

115
Q

What is gear mean frequency of a single gear reduction gear box with input speed of 36000 rpm and output speed of 1060 with 24 teeth pinion?

A

1440

116
Q

If you are taking vibration readings under 600 rpm use?

A

Displacement

117
Q

How are suction and discharge valves operated?

A

Differential pressure at pump.

118
Q

What does volume on a centrifugal pump depend on?

A

Resistance to flow.

119
Q

Where does maximum impeller wear widely with semi fluid solids?

A

Blade tips.

120
Q

Major types of seals used in pumps?

A

Static dynamic.

121
Q

When pumping clear uncontaminated H2O with constant pressure on suction side of pump, the stuffing box should work well with what kind of packing.

A

Solid packing.

122
Q

What is the reason for using steam throttle valves on large pumps?

A

Direct connected valves require too much force.

123
Q

What can be done to modify a reciprocating pump to make it provide a steady and continuous flow of liquid?

A

Add air chambers to outlet side(accumulator)

124
Q

What happens when discharge valves are closed on centrifugal pump?

A

Discharge pressure goes down and the pump slips to max.

125
Q

Gate valves are used as intake & discharge valves because of?

A

Low pressure loss.

126
Q

What is the cause of low suction lift?

A

Manufactures ratings.

127
Q

Which process is used to seal mechanical seals in an emergency?

A

Lapping.

128
Q

How do you bring a coil of packing down to exact size?

A

Roll it with a piece of pipe.

129
Q

What is the function of an electrical interlock to enable system that slips on startup?

A

Times the functions.

130
Q

What is the probable cause of gravity take up system that slips on startup?

A

Take up weight too light.

131
Q

On a belt conveyor that must be started under full load, what kind of drive should it be?

A

Fluid coupling.

132
Q

What chain is best used in abrasive conditions?

A

Mill chain.

133
Q

On an overhead conveyor with a compound vertical curve, the purpose of the straight section of track is?

A

To gain the required amount of elevation.

134
Q

A belt that has a section of it that always runs out of alignment is probably caused by?

A

Improper or uneven splice.

135
Q

Increasing co-efficient of friction on a drive pulley without increasing tension can be accomplished by?

A

Lagging snub pulley increases arc of contact.

136
Q

Easiest way to change speed of conveyor?

A

Change sheave or sprocket diameter or VFD.

137
Q

On a bucket elevator, the length of the splice should be?

A

Equal to the width of belt.

138
Q

On pneumatic dust conveyor piping, the amount of wear is?

A

On the outside radius of elbow.

139
Q

Millwrights measure electrical pressure with what kind of meter?

A

Volt meter.

140
Q

What steps up or down voltage?

A

Transformer.

141
Q

Bearings on electric motor, lock bearing is on what end of motor?

A

Drive end.

142
Q

Most common way to reverse direction on a dc motor?

A

Reverse armature lead.

143
Q

What is root cause analysis?

A

Why equipment failed.

144
Q

Who is responsible for providing MSDS?

A

Suppliers.

145
Q

Oxidizing material symbol is?

A

Flame on circle.

Millwright (1 decks)

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