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Ip Studies > Ip Studies > Flashcards

Ip Studies Flashcards

1
Q

Meter out flow control?

A

Controls the flow out of a cylinder to maintain speed

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2
Q

Where is an oil groove located ?

A

Ontop

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3
Q

What reduces leakage between inlet / discharge ?

A

Wear rings

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4
Q

4 way dcv leaking ?

A

Creep/ drift

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5
Q

Foaming in a hydraulic tank ?

A

Plugged vent

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6
Q

90 degree sharp corner what type of sling ?

A

Chain

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7
Q

Relief valves opening randomly?

A

Probley unloading at the compressor

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8
Q

Bad sauttered joint?

A

Contamination

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9
Q

Aligning shafts with level put in middle

A
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10
Q

Type of bearing on a wind turbine?

A

Spherical roller

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11
Q

Frl

A

Filter regulator lubricators

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12
Q

An offset or half link will change pitch by?

A

1 pitch

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13
Q

Master link reduces ? %

A

30%

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14
Q

Slow to medium chain sag?

A

2-3%

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15
Q

Medium chain speed sag

A

4-6?

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16
Q

Chain elongation

A

Chain wear

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17
Q

High speed stainless steel grinding wheel?

A

Aluminum oxide

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18
Q

Balance hole helps?

A

Axial thrust

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19
Q

Square key?

A

Transmits tourqe and timing

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20
Q

Width of a square key

A

1/4 diameter of shaft ?

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21
Q

Gib head key prevents?

A

Axial movement

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22
Q

Tapered gib head key is

A

1/8”

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23
Q

Min Sheave arc contact ?

A

120 degrees

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24
Q

Classic series belt?

A

A,B ,C ,D
Ax = cogged
3v= high capacity
2L = light duty

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25
Q

Poly v belt?

A

High speeds

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26
Q

Toe board and wood type on scaffold?

A

Toe board 6” wood type rough cut fir

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27
Q

Scaffold base to height

A

3:1

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28
Q

Gfci?

A

Ground fault circuit interuptor

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29
Q

Elasticity =

A

Bends and goes back to shape

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30
Q

Ductility?

A

How easily something can bend

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31
Q

Toughness?

A

Ability of material to resist breaking

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32
Q

Hardibility

A

Resist penetration

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33
Q

Fatigue ?

A

Repeatedly stressed and ends up breaking

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34
Q

General drill point angle ?
Soft materials ?
Hard materials ?

A

General 118 degrees
Soft pointy
Hard wider 130 degrees

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35
Q

Backfire in a torch?

A

Pop pop sound , low gas speeds

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36
Q

Wire rope clips

A

6x diameter

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37
Q

How do you control output of a centrifugal compressor?

A

By metering input

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38
Q

Good arrangement of set screws ?

A

One on top one 90 degrees of that

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39
Q

Mitre gears are 1:1 and 90 degrees

A

True

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40
Q

Before using EAT tools u would?

A

Centre punch test

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41
Q

Only normally open valve?

A

Pressure reducing valve ,

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42
Q

How much wear and stretch on chains ?

A

Wear 10%
Stretch 5%

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43
Q

First angle projection?

A
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44
Q

3rd angle projection

A
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45
Q

1 1/4 - 7 UNC - 2A

A

1 1/4 = basic size
7 = threads per inch
UNC = thread series
A = thread symbol

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46
Q

M20 x 2.5 - 5g

A

M = metric
20= basic size (20mm)
2.5 = thread pitch
5= tolerance position
g= bolt

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47
Q

What type of drawing is the most common

A

Isometric drawings

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48
Q

Eat tools

A

Grey,brown, green, yellow , red , purple

3” spacing concrete
1/2” spacing on edge

2”

49
Q

Woodruf key

A

First 2 digits /32. Last two digits /8”’s

50
Q

Tap types

A

Taper/ plug/ bottoming

51
Q

File types

A

Rough- course - bastard - second cut- smooth- dead smooth

52
Q

Machine screw =

A

x 0.013” + 0.060

53
Q

Hoisting ratios

A

General 5:1
Workers 10:1
Elevator 20:1
Chain 4:1

54
Q

Tapered down pin

A

1/4” per foot

55
Q

Npt taper

A

3/4 per foot

56
Q

Centre punch angle

A

90 degrees

57
Q

Prick punch angle

A

30-60 degrees

58
Q

Master precision level

A

0.0005”

59
Q

Precision level

A

0.005”

60
Q

Leave how much room for grout

A

3/4” - 1 1/2”

61
Q

Ladders

A

4:1

62
Q

What type of wire rope core do you use for lifting things and people

A

Iwrc

63
Q

Safe lifting angle of slings?

A

60 degrees

64
Q

Critical lifting angle

A

30 degrees

65
Q

Blade kerf

A

Width of the cut the blade makes in the material

66
Q

Drill sleeve

A

Takes tool from smaller to larger

67
Q

Drill socket

A

Takes took from larger to smaller

68
Q

Counter sink angle

A

82 degrees

69
Q

Suction head

A

Supply above pump

70
Q

Suction lift

A

Supply below pump

71
Q

Wear rings

A

3x the initial clearance

72
Q

Slip fit chain

A

Reduces capacity

73
Q

40 chain

A

4/8 then 0 means roller

74
Q

35 chain

A

3/8 5 = rollerless

75
Q

How much elongation on a chain

A

3%

76
Q

Hub designs A B C D

A

A = hubless
B = hub on one side
C= hub on both sides
D = split hub

77
Q

V belts transmit power by?

A

Gripping the sides in a pulley

78
Q

3 basic catagories of couplings

A

Rigid
Flexible
Special purpose

79
Q

2 types of clutches used for roll back

A

Roller ramp / sprag

80
Q

Friction clutches engage at

A

Any speed / they slip under shock loads

81
Q

Pre lubed bushing ?

A

Porous bronze / lube pocketed

82
Q

Hydro dynamic bearing

A

Depends on rotation of shaft to create oil wedge

83
Q

Hydro static

A

Depends on external pump to support the load

84
Q

Oil lift

A

Pump is on for start up

85
Q

Purpose of the cage when it comes to bearings

A

Push the rolling elements thru the unloaded zone

86
Q

Max heat for a bearing

A

120 degrees c or 80 degrees if it’s sealed

87
Q

Brinelling

A

Oops we fucked up

88
Q

False brinelling

A

Transport sorts deal

89
Q

Fire xtingguish

A

A = ash wood and paper
B = boom flammable
C= circuit / electrical
D = DEATH METAL FORK YA

90
Q

Acetylene max working pressure and Critical pressure

A

Max working psi 15
Critical pressure 28

91
Q

What measures fan pressure

A

Manometer

92
Q

Forced draft =

A

Pushing out

93
Q

Induced draft

A

Pulling in

94
Q

Balanced draft

A

Pulling and pushing air

95
Q

Perfect vacuum for

A

-14.7 psig

96
Q

Absolute pressure =

A

14.7 Pisa @ sea level

97
Q

Gauge pressure

A

14.7+ psi a

98
Q

Npshr

A

Net positive suction head required

The minimum absolute pressure required at the suction port of the pump to prevent cavitation

99
Q

Regenerative turbine pump

A

Pump used for relatively high heads and low flow applications
Stripper is the seal?

100
Q

Location of the discharge port in a screw compressor dictates?

A

Determines the pressure ratio

As the discharge gets smaller and closer to the centre the higher the ratio

101
Q

Overall efficiently in a screw compressor

A

Effected by leakage . When compressor runs faster the effcientcy increases!

102
Q

Capacity of a screw compressor and lobe profiles

A

Capacity is based off rotor length diameter and profile , bigger rotor or longer delivers greater volume

Asymmetrical better seal and efficiency over symmetrical lobes

103
Q

Fixed bearing location on screw compressor

A

Dishcharge side , clearances on the ends must be only 2 to 3 thou to minimize leakage

104
Q

Bearing types and arrangement for screw compressor

A

Discharge fixed with tapered roller bearing
Suction must be free to float using cylindrical roller bearing

105
Q

Wet screw compressor air must pass thru what type of filter

A

Coalescing filter element

106
Q

Scavenger line is used where

A

Pulls oil from the separator element and is fed back into the compressor

107
Q

What shows up as a high discharge temp on screw compressor ?

A

Loss of oil pressure
Rotor rub from loss of bearings

108
Q

Keeping the ___ at a minimum temperature also prevents moisture from condensing out of the air inside the compressor

A

Oil

109
Q

Oil injection location on screw compressor

A

Low pressure section towards suction to allow pressure differential to push the oil into the compressor

110
Q

Oil free screw compressors require ?

A

Timing gearsb

111
Q

Drawback of oil free screw compressors

A

Low compression ratio

112
Q

Oil free screw compressors require what between stages

A

Intercoolers

113
Q

Air cooled casings are used unless the heat from compression gets to great in that case cooling is usually accomplished by

A

water jackets around the compressor

114
Q

Water injected screw compressor

A

Greatly increases the volumetric efficiency through improved sealing , reduced temperatures and reduced hp requirements

115
Q

Water injected screw is like

A

Like a wet screw but the separator is used to store air and separate out the water instead of sepersting out the oil

116
Q

Rotary valve is a

A

Efficient way of unloading a screw compressor

117
Q

Slide valve

A

No ports or a turn valve like the last one it’s a full peice that slide in or out to change displacement ( more efficient ) suitable for refrigeration

118
Q

Manufacturers recommend filter separator element replacement after

A

10-12 psi drop across the filter
Another sign that would indicate replacement would be excessive amount of oil carryover in dishcharge lines

Ip Studies (2 decks)

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