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Millwright Level 4 > level 4 > Flashcards

level 4 Flashcards

1
Q

how many measurements should be taken to make sure the cylinder is round?

A

3

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2
Q

where is the most wear on a cylinder?

A

most of the wear occurs towards the top on the major thrust side

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3
Q

time allowed for for die to dry for magretic partical is called

A

dewell tine

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4
Q

the most accurate method of checking the bearing clearance but also the most time consuming

A

measurement

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5
Q

what is used to insolute a turbine

A

lagging

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6
Q

where is the trust bearing located on a turbine

A

inlet side

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7
Q

the casing of a steam turbin is called a ?

A

cylinder

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8
Q

on some turbines you tighten the flange bolts by hydroulically stretching them and turning thenut down, this method does not require heating of ?

A

the bolts

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9
Q

the foundation of the turbine should be isolatedfrom the other building floors. it should be at least ____times the mass of all the turbines assembly so that it does not move and helps dampen vibrations from the machine

A

2.5

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10
Q

where are the defusers located in a das turbin

A

between the compresser and cumbustion chamber

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11
Q

all desiel engiens have to be

A

artifishely asporated

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12
Q

why are crank shaft filited

A

to prevent cracking

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13
Q

what is vibration dempeners for

A

to reduse crank shaft torsional vibration

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14
Q

where do condisat go in a steam turbin

A

hot well

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15
Q

what pump is used to pump the condisat

A

condisate boiler feed pump

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16
Q

where is a drive pully on a gravity drop drive

A

below the head pully

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17
Q

what is the purpose of a S drive

A

To create enough weight on a chain to keep tension

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18
Q

what are the adventages of fabricated chiar

A

it can be welded on

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19
Q

a virtica screw conving should have a
(to be more efficient)

A

half pitch

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20
Q

what is the minimum splice length is

A

the width of the belt

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21
Q

the frame that supports the rollers also called

A

the roll case

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22
Q

cement- based grout can be workedon after seven days but reaches its full compressive strength after

A

28 days

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23
Q

to level a machine surface using a precision level first determine the ratio between the
Surface to be leveled and the length of the precision level

A
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24
Q

drop in ancher sleeves requires a

A

setting tool

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25
Q

which anchor bolt is best suited for the edge of a concrate foundation

A

adhesive

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26
Q

plan view is looking down. elivation view is the ___________

A

side view to see elivation

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27
Q

oil whirl usually occurs at frequencies of about ____ to _____ of the shaft rotation

A

45% to 50%

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28
Q

what type of balancing requires a computer

A

dynamic imbalance

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29
Q

a ____ had a value of 9.8 meters per second or 32 feet per second

A

G

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30
Q

what is the purpose of lagging on steam turbines

A

retain heat and protect personnel

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31
Q

what drives a turbo

A

exhaust gas

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32
Q

what is the blading called in a diaphragm

A

reaction type blades

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33
Q

which blades do not have a pressure drop

A

impulse type

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34
Q

how many times do the crankshaft rotate for 1 cycle of a 4-stroke engine

A

crankshaft turns twice

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35
Q

which pulley do the load travel towards

A

head pulley

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36
Q

which pulley is usually the driven

A

head pulley

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37
Q

what is a crown pulleys purpose

A

helps keep the belt centered

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38
Q

what is a guide rollers purpose

A

to help direction of of belt stop the belt from hitting steel frame

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39
Q

which zone takes the most wear

A

the loading point

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40
Q

where do you place impact rollers

A

inderneath shoots

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41
Q

what kind of takeup dp you use on small flat belts

A

screw take ups

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42
Q

whats lagging purpose on a tail pulley

A

to increase the coefficient of friction between belt and pulley

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43
Q

what is ultrasonic testing used for

A

to find cracks

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44
Q

what should you do to paint before meg particile testing

A

remove/ grind off

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45
Q

what is used to measure vibration

A

vibration probe/analyzer

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46
Q

who should sign off a log book

A

a journeyman

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47
Q

how many measurements need to be taken to ensure cylinder is round

A

3

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48
Q

where does the most wear occur on a cylinder

A

the top

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49
Q

the casing of a system turbine is called

A

cylinder

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50
Q

what light do you use for fluroscence

A

uv

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51
Q

definition of NDT

A

non-destructive testing

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52
Q

what is the most important thing then starting up a steam turbine

A

use jacking oil

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53
Q

where do the condensate go in a turbine

A

it goes in a hot well

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54
Q

how wide should you have a lap joint on a bucket conveyor

A

at least one width of the belt

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55
Q

backstop on a bucket convyor

A

allow it to travel in one direction only

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56
Q

heavy duty chain (H-style)

A

pintle chain

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57
Q

advantage of hot vulcanize

A

strongest belt join

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58
Q

hydraulic stretch how would you tighten the flange bolts on a turbine

A

by hand tightening bolt

59
Q

what is the purpose of fillets on a crankshaft

A

to avoid stress areas on the crank

60
Q

what is the purpose of a vibration dampener

A

to reduce crankshaft torsional vibration

61
Q

where is the drive pulley on a gravity drop drive

A

below the head pulley

62
Q

the materials ability to emit thermal radiation

A

emissivity

63
Q

___________ is the process of assuring that all systems and components of a building or industrial plant are designed, installed, tested, operated, and maintained according to the operational requirements of the owner or final client

A

commissioning

64
Q

Deficiencies are then classified as _______________ identifying when each must be complete

A

type-a, type-b, or type-c

65
Q

_______ is critical and must be addressed before proceeding to the next activity.

A

Type-A

66
Q

_______ does not need to be addressed immediately and does not impact subsequent activities but must be rectified prior to handover to the owner.

A

Type-B

67
Q

______ deficiencies are minor defects and are agreed by the owner to be rectified after handover.

A

Type-C

68
Q

during the design and procurement phase of the project, a criticalstep prior to equipment delivery to site is _____________

A

Factory acceptance testing (FAT)

69
Q

______ is the most thorough verification and will make on-site commissioning go much smoother if it is known in advance that the equipment delivered to the site works.

A

FAT

70
Q

_________ occurs at the end of construction once the equipment is installed.

A

Mechanical completion

71
Q

upon mechanical completion of eachportion of the work, and deficiencies agreed to, ___________ activities can thencommence

A

Pre-Commissioning

72
Q

____________ is the last phase in the lifetime of a facility, following its design, construction, operation, amd permanent shutdown.

A

decommissioning

73
Q

_______ refers to putting the facility in an idle state or temporary shutdown in a manner that allows restarting later, when the business environment makes the process attractive again

A

mothballing

74
Q

once it is clear that the plant has to be shut down, start planning the 3D process which is?

A

Decontamination, Dismantling and Disposal

75
Q

_________applications include material transfer and machine loading and unloading.

A

material-handling

76
Q

_________ this is a device that is attached to the end of a robotic arm to carry out its tasks

A

grippers and effectors

77
Q

____________ sometimes referred to as an end effector is a crucial aspect of robotic technology

A

End of arm tooling (EOAT)

78
Q

____________ also referred to as rectilinear or gantry robots, these cartesian robots consist of three linear joints that use the coordinate system of X, Y & Z. usually with a wrist attached for rotational movement.

A

cartesian

79
Q

____________ cobots typically have a sieek shape, with no pinch points and with internal features such as motors and wires.

A

collaborative robot (cobot)

80
Q

__________ stands for selective compliance articulated robot arm.

A

SCARA

81
Q

_________ who possessess greater skills, knowledge and experience.

A

mentor

82
Q

______ who is looking to increase their skills, knowledge and experience

A

mentee

83
Q

tools and equipment used to ______. _______. _______ and repair robotics and automative

A

install, diagnose, maintain

84
Q

the most efficient type of steam turbine is?

A

condensing

85
Q

how do friction bearings self alining

A

spherical seat

86
Q

what is the purpose of a defuser on a turbine

A

turn high speed into pressure

87
Q

The most important factor in a centrifugal bucket conveyor

A

Speed

88
Q

Shaft that joins two screw conveyors

A

Dungeon shaft

89
Q

What chain is used for a side load?

A

Rooftop or Camelback

90
Q

Ratchet and pawl is a type of

A

Backstop

91
Q

What are the 3 main types of hydraulic turbines?

A

Pelton, Francis, Kaplan

92
Q

What is the purpose of a diffuser on a turbine

A

Turn high speed into pressure

93
Q

The most efficient type of steam turbine

A

Condensing

94
Q

How do friction bearings self-align?

A

Spherical seat

95
Q

Best way to lift a turbine?

A

Spreader bar

96
Q

What is the purpose of lagging on steam turbines?

A

Retain heat and protect personnel

97
Q

What drives a turbo?

A

Exhaust gas

98
Q

What is the blading called in a diaphragm?

A

Reaction type blades

99
Q

Which blades do not have a pressure drop?

A

Impulse type

100
Q

How many times do the crankshaft rotate for 1 cycle of a 4-stroke engine?

A

Twice

101
Q

Which pulley do the load travel towards?

A

Head pulley

102
Q

Which pulley is usually the driven?

A

Head pulley

103
Q

What is the crown pulleys purpose?

A

Helps keep the belt centred

104
Q

What is the guide rollers purpose?

A

To help direction of the belt stop the belt from hitting the steel frame

105
Q

Which zone takes the most wear?

A

The loading point

106
Q

Where do you place impact rollers?

A

Underneath shoots

107
Q

What kind of takeup do you use on small flat belts?

A

Screw take ups?

108
Q

What’s lagging’s purpose on a tail pulley?

A

To increase the coefficient of friction between belt and pulley

109
Q

What is ultrasonic testing used for?

A

To find cracks/defects

110
Q

What should you do to paint before mag particle testing?

A

Remove? Grind off?

111
Q

What is used to measure vibration?

A

Vibration probe/analyzer?

112
Q

Which part of the belt takes the shock absorb?

A

Carcass

113
Q

what tool is used for layout of a robotic system

A

Theodolite

114
Q

What is the difference between the 6-axis/7-axis robot?

A

Freedom of movement

115
Q

Robotic lockout tagout question

A

ECU (Electronic Control Unit)

116
Q

How do you balance a pump impeller?

A

Measure original imbalance, install a trial weight, place the correction weight

117
Q

What is caused by keyways on a shaft?

A

Dynamic imbalance

118
Q

Reason for axial fan to be unbalanced

A

Dirt build up/dirt fall off

119
Q

Definition of side to side unbalanced

A

Static imbalance

120
Q

Definition of quasistatic

A

Static and couple

121
Q

Belt speed formula (gear box)

A

A series of letters and numbers

122
Q

When should you adjust the packing on a cold water pump?

A

After it starts

123
Q

Confirm communication with mentor

A

Repeat

124
Q

What is meant by cold alignment on a water pump?

A

Doing it at room temperature

125
Q

What is displacement measured in?

A

Thousandths of an inch or hundredths of a mill

126
Q

When all components have the same phase angle, this is called ___________ ?

A

In phase

127
Q

Best way for mentor to assess progress

A

Watch them

128
Q

Procedure for dye penetrant

A

Clean material, spray on penetrant, let it dwell, spray cleaner on rag, spray developer

129
Q

What is the most important thing when starting up a steam turbine?

A

Test emergency trip

130
Q

What houses a screw conveyor

A

Trough

131
Q

Oil analysis shows:

A

Oxidation, additive breakdown and any metals, fuel or glycol in the system.

132
Q

Back lash couplings are used for

A

Accuracy

133
Q

When removing buckets from a bucket conveyor make sure to keep it

A

In balance

134
Q

Most accurate way to remove weight on a “shive”? Is to

A

Drill holes

135
Q

Valves on top of a steam turbine

A

Throttle valves

136
Q

Blades on the discharge end of a turbine are

A

Bigger

137
Q

When do you shut off the jacking pump on a turbine?

A

60rpm

138
Q

Steps to starting a gas turbine are:

A

-build pressure
-fuel and igniter

139
Q

Blades past the combustor are

A

The turbine

140
Q

2/3rd of power from a gas turbine goes to

A

Compress it’s own air

141
Q

Spectrograph is good for detecting

A

Early failure in lubricant

142
Q

In order to get a spectrum from a sinwave you need

A

FFT

143
Q

If an axial vibration is 50% or more it is

A

Radial

144
Q
A

Millwright Level 4 (9 decks)

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