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Year Four Final Millwright > Study Questions > Flashcards

Study Questions Flashcards

1
Q

Erosion is in low pressure blades

A

Also most wear in steam turbine

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2
Q

What’s measures the phase on a machine

A

Strobe light

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3
Q

Measuring the centre line distance clearance

A

0.67 mils

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4
Q

The ignition coil in an engine

A

Transistor

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5
Q

Belts and chains tension or sag

A

2%-3%

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6
Q

If pipe ID doubles the speed will

A

Decrease by 1/4 (25%)

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7
Q

What direction does thrust in steam go in turbine

A

Same direction as flow

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8
Q

How many power strokes does a 6 cylinder 2 stroke engine have in 1 crank revolution?

A

6 power strokes

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9
Q

What is best for condition monitoring on a diesel?

A

Oil analysis

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10
Q

Gear has 24 teeth and runs at 3600rpm in hz

A

24x3600/60 = 1440HZ

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11
Q

Where is the highest pressure in a gas turbine?

A

Diffuser

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12
Q

Where is secondary air introduced?

A

Intermediate section

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13
Q

What gasket type is used for highest pressures

A

Steel ring type

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14
Q

What controls firing order

A

Crankshaft throws

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15
Q

What is the pressure rating for the flange

A

150

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16
Q

What check valve is NOT good for high pressure

A

Flap? Disc?

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17
Q

What does the centrifugal separator do

A

Cleans the air

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18
Q

What actuates an over speed trip

A

Centrifugal force overcomes the spring

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19
Q

How do you fix crankshaft deflection?

A

Shim and level the base

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20
Q

Does the image show a hanger bearing or a gudgeon shaft?

A

Hanger bearings are in the middle.. shaft is beside them. Plate that connects 2 shafts

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21
Q

How do you choose the correct gasket material

A

Internal pressure and bolt tension

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22
Q

What chain is used with abrasive material?

A

Mill chain

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23
Q

What is a chain that doesn’t bend backwards

A

Rooftop/camel back

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24
Q

Ammeter measures in

A

Series

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25
Q

Voltage measure’s in

A

Parallel

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26
Q

What does the servo valve act on in hydraulic Governor

A

Flyballs/flyweights

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27
Q

What pipe is used for its corrosion resistance

A

Cast iron

And stainless steel?

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28
Q

Shim movements

A

Count the hot?

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29
Q

Power? Find the amps first

A

I=square root of P over R

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30
Q

What stroke would you be on if both valves are closed

A

Compression or power stroke

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31
Q

What is valve overlap

A

When intake and exhaust valves are open at the same time

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32
Q

What is used with the proximity probe

A

A container of water to cool

33
Q

Stop button is normally closed

A

Let’s electricity pass through until pushed to open circuit

34
Q

The root cause of a problem

A

WHY! Did it happen.
Why did that happen
Why did that happen
Why? WHY!? WHYYYYYYY!

35
Q

What is the purpose of the blind

A

To close two flanges

36
Q

Wire lacing is used when?

A

Replaces shroud to keep blade tips in place on low pressure side of large reaction turbine

37
Q

What does the condenser do in steam turbine

A

Increases pressure differential (vacuum)

38
Q

What is the purpose of artificial aspiration

A

Increase horse power

39
Q

A type of splash lube

A

Oil dipper

40
Q

Inner race damage of bearing in ball pass frequency

A

0.60 x RPM x # of rolling elements

41
Q

Frequency of in imbalance

A

1 x RPM

42
Q

Secondary air is used for

A

Cooling

43
Q

Large turbines use kingsbury tilting pads

A

Yeah. The kingsbury

44
Q

What is the cause of diesel cylinder misfire?

A

Sticky valves

45
Q

Ultrasonic testing uses

A

Sign waves

46
Q

Screw conveyor pitch?

A

Half pitch

47
Q

Where do you measure pipe strain

A

Measure at 0° and 90° on the coupling

48
Q

What is BMEP?

A

Brake mean effective pressure

49
Q

Spray carburetor is part of?

A

LPG

50
Q

Installation and mounting to bedplate is critical when torque to foundation

A

Uhh? Fuck yeah?

51
Q

Where is the block deck height measured

A

From centre of the crank shaft to the bottom of liner bore depth

52
Q

What is the max deviation of main bearing bores

A

1/2 of the initial clearance of a new bearings

53
Q

When should you NOT use chrome rings

A

In a chrome bore

54
Q

Electrons flow negative to positive

A

Conventional is positive to negative

55
Q

What do transformers use to step up or step down voltages?

A

Inductance

56
Q

Peen blades on the outside is the

A

Tenon

57
Q

What causes the main stop valve to close

A

Spring

58
Q

What is a bridge gauge

A

Manufacturer bracket that quick measures bearing clearance

59
Q

What is the gradual deviation in speed in a prime move that is not properly governed

A

Speed drift

60
Q

XIC symbol

XIO symbol

A

Click the tiny picture you doink

61
Q

2 most common ways to measure pressure

A

1-Bellows operated pressure switch

2-diaphragm operated switch

62
Q

Double pole single throw symbol

A

Click the tiny picture and snap one off booiiiz

63
Q

What is the main cause of oxidation

A

Heat

Gum and varnish = sticky valves

64
Q

Oil samples taken should flush how many times

A

5 flushes

65
Q

Micron sizing

A

4/6/14

66
Q

Ounce inches

A

Twice the distance half the weight

67
Q

What do you need to find Trial weight size

A

Weight of rotor, RPM of rotor and radius where you placed weight

68
Q

Where is the heavier weight placed

A

On the closest blade to the imbalance

69
Q

How do you hold gasket in place while using the hammer method

A

Install 2 bolts through it to hold in place

70
Q

How do anaerobic sealants cure?

A

In the absence of air

71
Q

Which elbow has both male and female threads

A

Street elbow - that hard ass motha fucka

72
Q

What is the useful limit of a benchmark gauge

A

95%

60° - min
90° - ideal
120° max

73
Q

Highest temperature insulation

A

Ceramic

Or refractory?

74
Q

What insulation is best used for coldest temp

A

Cellular glass

75
Q

Research and development stage

A

Innovation stage

76
Q

What type of chains are used as transfer chains

A

Rooftop and roller chains

77
Q

How is the width of conveyor chosen

A

Width of largest package used

78
Q

Lowest number of rollers in contact with package

A

3

79
Q

Lowest number of SKATE rollers in contact with package

A

5

Year Four Final Millwright (1 decks)

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