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Millwright Level 3 > Level Exam Sample > Flashcards

Level Exam Sample Flashcards

1
Q

Where would you use an intercooler?

A

In between stages

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2
Q

Correct placement of shims?

A

Biggest first, next on top, smaller in the middle

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3
Q

Where do you get the measurement for vertical angular misalignment?

A

Coupling

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4
Q

Where is a relief valve located?

A

Where ever pressure is built up/after pump

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5
Q

What decreases leakage from the volute to the eye?

A

Wear plates/rings

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6
Q

Procedure for dismantling a fan after loto?

A

Block the blades

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7
Q

What do you do after a weld repair on a fan?

A

Check for balance

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8
Q

Gland tight and still leaking?

A

Change packing

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9
Q

What pump contains a crescent?

A

Internal gear

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10
Q

What valves are used for free flow in one direction and controlled flow in the other?

A

check valve

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11
Q

What valve is used in a quick disconnect?

A

Check valve

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12
Q

What increases friction in hydraulic lines?

A

Bends/fittings

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13
Q

Definition of a schematic?

A

Shows the internal or external layout of a system

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14
Q

What is a pilot line?

A

Dotted lines (hidden line)

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15
Q

Cause for hydraulic ram not moving or moving slow?

A

Seals leaking on piston

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16
Q

Why do you keep a space when soldering copper pipe?

A

To allow for capillary movement

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17
Q

What do stainless steel pipe carry

A

corrosives/acids

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18
Q

Second valve cap still getting hot after replacement?

A

Blockage in line

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19
Q

What instrument is used to detect softfoot?

A

Dial indicator, feeler gauges and laser

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20
Q

What is the outcome of sheaves/couplings aligned on a fan?

A

Longer life, more dependability, life expectancy, more efficient

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21
Q

How is pressure measured?

A

Psi/KpA/Bar

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22
Q

What will be a sign of misalignment?

A

Vibration

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23
Q

What safety precaution do you perform before starting an alignment?

A

loto, deenergize

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24
Q

What safety precaution is taken when working on a fan that is already LOTO?

A

Block the blades

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25
Q

When pressure increases velocity ____________

A

decreases

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26
Q

What is affected by a thin gasket on an axially split pump?

A

Tighter clearances

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27
Q

How is capacity changed on an axial pump?

A

Adjusting impeller/change blade pitch

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28
Q

What type of valve is the most precise for flow control?

A

Needle valve

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29
Q

What is the biggest size of pipe that can be used in a handheld pipe bender?

A

1⁄2

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30
Q

How are solenoids operated?

A

Electrically/ spring return

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31
Q

Which valve cannot be used for throttling?

A

Gate

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32
Q

What is the confined space attendants job?

A

Notify rescue personnel

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33
Q

2 types of seals used in pumps ?

A

static and dynamic

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34
Q

Where is the motor sought in a dynamic position?

A

In line when at operating temperature

Higher in static position

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35
Q

Why would a coupling purposely be misaligned?

A

Thermal growth

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36
Q

What action takes place after a rough alignment?

A

soft foot

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37
Q

What is a permanent benchmark?

A

A known elevation or reference point

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38
Q

What order does Lubricator, filter, regulators go in?

A

FRL

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39
Q

In a vane pump, how do you increase capacity?

A

Move reaction ring off centre

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40
Q

Half in schedule 40 pipe ID

A

0.622

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41
Q

How do you increase pump capacity?

A

Increase RPM/change impeller

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42
Q

How do you adjust compressor output?

A

pressure switch/regulator

43
Q

What shows the interchange connection between components?

A

dot in the center of a cross

44
Q

What is the purpose of a poppet in a gas accumulator?

A

Bladder doesn’t get sucked in accumulator

45
Q

What do you do when the pump does not have enough pressure to overcome the load?

A

adjust pressure relief valve

46
Q

At what location are dial measurments usually taken on a coupling/shaft?

A

3, 6, 9, 12

47
Q

How accurate is an optical level?

A

0.001”

48
Q

How do you determine which pedal block is higher using an optical level

A

lowest number

49
Q

What fan type/blades are hollow?

A

airfoil

50
Q

How is fan pressure measured?

A

cubic feet per minute

51
Q

What is the purpose of a steam trap?

A

Trap moisture/dirt

52
Q

How is air pressure relieved after a regulator?

A

Back to atmosphere

53
Q

What is it called when air leaks back into the inlet?

A

slip

54
Q

VA VO HA HO?

A

Rough alignment

55
Q

What two valves make up a meter out system?

A

Flow control/ check valve

56
Q

How is piston clearance set?

A

Turning the piston rod into or out of the crosshead

57
Q

What determines clearance end in a cylinder?

A

The volume remaining when piston is at the end of stroke

58
Q

What is the average air humidity percentage at sea level?

A

62% or 64%

59
Q

What valve is used for suspended loads in hydraulics?

A

counter balance

60
Q

How is air reversed in a pneumatic motor?

A

Flip cam and rotor over for one way motor

61
Q

How is a 3-port valve identified?

A

3 ports for flow

62
Q

Which valve is needed for a double acting cylinder?

A

4 port/3 pistons

63
Q

What is psig at the compressor inlet at sea level

A

0

64
Q

What would be the cause of insufficient discharge pressure in a pump?

A

normal pump wear

65
Q

What is the purpose of a detent?

A

To hold a position

66
Q

What is a wear ring clearance/tolerance?

A

3 times its initial clearance

67
Q

What valve is used with an accumulator?

A

shut off valve (gate, globe, ball)

68
Q

What happens when the discharge valve is closed on a positive displacement pump?

A

pressure increases

69
Q

What are the types of hydraulic pumps?

A

radial/axial

70
Q

Why would a coupling be purposely misaligned?

A

Thermal growth

71
Q

If volume is deceased by 1/4, what happens to the pressure?

A

increases

72
Q

What tool is used to measure air pressure?

A

pressure gauge

73
Q

What measures the amount of air going through a system?

A

flow meter

74
Q

What is the most efficient compressor layout?

A

loop system

75
Q

What length of post do you use in a laser alignment system?

A

short as possible

76
Q

What pressure does a pump normally have to overcome to move fluid?

A

head pressure (pump head)

77
Q

A tank has a the following measurements. Find the capacity of the tank in imperial gallons.
Length: 45 inches
width: 20 inches
height: 55 inches

A

Volume = l x w x h
Volume = 45” x 20” x 55”
Volume = 49,500 cubic inches

Convert cubic inches to imperial gallons divide by 277
49, 500/277 = 178.7 imperial gallons

78
Q

Which pump impeller is best suited for thick stringy substances?

A

Semi-open impeller (open impeller with scallop shroud)

79
Q

What type of blades are the most efficient in a fan?

A

air foil

80
Q

What type of piping is used in hydraulic systems?

A

pickled and oiled

81
Q

What is the formula for the area of a cylinder?

A

Area = 2πrh+2πr^2

82
Q

What does NPT stand for?

A

National Pipe Thread

83
Q

What does ISO stand for?

A

International Organization of standardization

84
Q

Which diameter stays constant with pipe?

A

Outside (up to 12 inches)

85
Q

Why is liquid sometimes injected into the vacuum stream of a lobe blower?

A

to increase efficiency

86
Q

What is the purpose of the volute in the discharge of a centrifugal pump?

A

increase pressure

87
Q

What is the recommended amount of slack for a horizontal, one direction chain drive?

A

2%

88
Q

What do you check after a new motor is fitted to a centrifugal pump?

A

rotation

89
Q

What is required when working from heights?

A

Fall arrest

90
Q

Why is coolant or cutting oil used when drilling?

A

To protect the metal you are cutting/bit/cooling purpose

91
Q

A new blower fan is installed in a high temperature environment. Which type of drive is required?

A

Chain drive

92
Q

A cylinder of gas under a pressure of 1,800 psig at 70 °F heats up to a temperature of 130 °F. What is the new pressure within the cylinder? (Charles Law questions)

A

P1/P2 = T1/T2
First convert psig to psia = 1,800 + 14.7 = 1814.7
Convert F to Rankine = 70 + 460 = 530
= 130 + 460 = 590
1,814.7/ n = 530/590
n = 2020.138 psia

93
Q

______ inches = 1 psig

A

27.7

94
Q

1 psia = ______kPa

A

6.89

95
Q

_____ psi = 1 foot

A

0.433

96
Q

______ degrees Celcuis = 273 K

A

0

97
Q

______degrees Celcius = 0 K

A

-273

98
Q

0 *F = _____ Rankine

A

459

99
Q

1 us gallon = ______ square inches

A

231

100
Q

1 bar = _______psi

A

14.5

101
Q

1000 cm3 = ____ litre

A

1

102
Q

________ inches3 = 1 imperial gallon

A

277

103
Q

29.92 Hg = _______ psi

A

14.7

Millwright Level 3 (15 decks)

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