Study Questions Flashcards

(79 cards)

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
Voltage measure’s in
Parallel
26
What does the servo valve act on in hydraulic Governor
Flyballs/flyweights
27
What pipe is used for its corrosion resistance
Cast iron And stainless steel?
28
Shim movements
Count the hot?
29
Power? Find the amps first
I=square root of P over R
30
What stroke would you be on if both valves are closed
Compression or power stroke
31
What is valve overlap
When intake and exhaust valves are open at the same time
32
What is used with the proximity probe
A container of water to cool
33
Stop button is normally closed
Let’s electricity pass through until pushed to open circuit
34
The root cause of a problem
WHY! Did it happen. Why did that happen Why did that happen Why? WHY!? WHYYYYYYY!
35
What is the purpose of the blind
To close two flanges
36
Wire lacing is used when?
Replaces shroud to keep blade tips in place on low pressure side of large reaction turbine
37
What does the condenser do in steam turbine
Increases pressure differential (vacuum)
38
What is the purpose of artificial aspiration
Increase horse power
39
A type of splash lube
Oil dipper
40
Inner race damage of bearing in ball pass frequency
0.60 x RPM x # of rolling elements
41
Frequency of in imbalance
1 x RPM
42
Secondary air is used for
Cooling
43
Large turbines use kingsbury tilting pads
Yeah. The kingsbury
44
What is the cause of diesel cylinder misfire?
Sticky valves
45
Ultrasonic testing uses
Sign waves
46
Screw conveyor pitch?
Half pitch
47
Where do you measure pipe strain
Measure at 0° and 90° on the coupling
48
What is BMEP?
Brake mean effective pressure
49
Spray carburetor is part of?
LPG
50
Installation and mounting to bedplate is critical when torque to foundation
Uhh? Fuck yeah?
51
Where is the block deck height measured
From centre of the crank shaft to the bottom of liner bore depth
52
What is the max deviation of main bearing bores
1/2 of the initial clearance of a new bearings
53
When should you NOT use chrome rings
In a chrome bore
54
Electrons flow negative to positive
Conventional is positive to negative
55
What do transformers use to step up or step down voltages?
Inductance
56
Peen blades on the outside is the
Tenon
57
What causes the main stop valve to close
Spring
58
What is a bridge gauge
Manufacturer bracket that quick measures bearing clearance
59
What is the gradual deviation in speed in a prime move that is not properly governed
Speed drift
60
XIC symbol XIO symbol
Click the tiny picture you doink
61
2 most common ways to measure pressure
1-Bellows operated pressure switch 2-diaphragm operated switch
62
Double pole single throw symbol
Click the tiny picture and snap one off booiiiz
63
What is the main cause of oxidation
Heat Gum and varnish = sticky valves
64
Oil samples taken should flush how many times
5 flushes
65
Micron sizing
4/6/14
66
Ounce inches
Twice the distance half the weight
67
What do you need to find Trial weight size
Weight of rotor, RPM of rotor and radius where you placed weight
68
Where is the heavier weight placed
On the closest blade to the imbalance
69
How do you hold gasket in place while using the hammer method
Install 2 bolts through it to hold in place
70
How do anaerobic sealants cure?
In the absence of air
71
Which elbow has both male and female threads
Street elbow - that hard ass motha fucka
72
What is the useful limit of a benchmark gauge
95% 60° - min 90° - ideal 120° max
73
Highest temperature insulation
Ceramic Or refractory?
74
What insulation is best used for coldest temp
Cellular glass
75
Research and development stage
Innovation stage
76
What type of chains are used as transfer chains
Rooftop and roller chains
77
How is the width of conveyor chosen
Width of largest package used
78
Lowest number of rollers in contact with package
3
79
Lowest number of SKATE rollers in contact with package
5