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First Year Millwright > Rim and Face Shaft Alignment, Grouting, Levelling and Anchoring > Flashcards

Rim and Face Shaft Alignment, Grouting, Levelling and Anchoring Flashcards

1
Q

Runout refers to?

A

Eccentricity

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2
Q

Misalignment can cause?

A
  • equipment damage
  • vibrations
  • lost of production
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3
Q

What are the three types of misalignment?

A
  • offset
  • angular
  • combination
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4
Q

The most common type of misalignment is?

A

combination

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5
Q

The practice of lining up the shafts of two machines that are or will be coupled to each other is called?

A

Collinearity

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6
Q

Along with misalignment caused by pipe to a machine connection and weight of fluid in the pipe could cause pipe strain as well as

A

Thermal change expansion or contraction

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7
Q

What are the three basic types of couplings

A
  • rigid
  • flexible
  • special purpose
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8
Q

Use elastomer shims to

A

correct angular soft foot

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9
Q

What is pipe strain and why is it important to correct it?

A

is when piping attached to a piece of equipment and the weight stresses the machine housing

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10
Q

Machines have various type of seals such as

A
  • lip
  • labyrinth
  • mechanical
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11
Q

How does end float affect a rim and face alignment/

A

it causes face readings angularity to be unreliable

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12
Q

The running speed of the equipment and the style of coupling would dictate

A

how accurate the alignment would have to be

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13
Q

what is the maximum number of shims that can be placed under each foot?

A

four or fewer

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14
Q

What is bolt bound?

A

its a situation where the hold-down bolts do not allow sufficient horizontal movement

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15
Q

If a dial indicator is set up to read on the outside (backside) of the coupling face instead of the inside?

A

Only the sign of the readings changes

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16
Q

You are performing an alignment and find one machine has coupling runout, how do you compensate for this?

A

Rotate both machines shaft together

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17
Q

The correct term for the condition whereby a machine does not sit properly on all its mounted feet is?

A

soft foot

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18
Q

When doing a vertical alignment, a positive face reading at the six o’clock position indicates?

A

the coupling gap is smaller at the bottom

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19
Q

When the dials are mounted, which machine shaft should they be reading off?

A

the fixed machine

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20
Q

To correct for vertical misalignment you would?

A

Add or remove equal amount of shims under the front legs and add or remove different but equal amount of shims under the back leg of the MTBM

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21
Q

After alignment is completed jacking bolts should be?

A

left loose when the alignment is completed

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22
Q

What are vibrations isolators?

A

they are use to prevent vibrations

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23
Q

What is the most precise spirit level?

A

the master precision level

24
Q

What are the two types of grout used in machine installations?

A
  • cement grout mixture

* polymeric

25
Q

Cement base grouting can be worked after curing for?

A

7 days

26
Q

Cement grout reaching full strength after?

A

28 days

27
Q

Grout is so stiff that formwork is not require?

A

false- form prevents the grout from slumping until it sets properly

28
Q

Should you apply grout to a smooth concrete surface

A

No, Never

29
Q

Do not place cement base grout mixtures below what temperature?

A

5°C

30
Q

How would you compensate for voids or air pockets remaining under the base?

A

you need to drill small holes through the base plate in order to release trapped air and prevent voids

31
Q

What are the disadvantages of polymeric grout?

A

*synthetic grouts have a shelf life of only one year, and a usable time of only 30 minutes to 1 hour

32
Q

Before grouting, you should torque anchor bolts to?

A

50% of their final value

33
Q

Whether expandable or non expandable the type of anchor bolt being installed determines the?

A

type of drill

34
Q

Reference lines are also known as?

A
  • working lines
  • control lines
  • datum lines
35
Q

Which anchor is design to accommodate slight adjustment?

A

flexible

36
Q

Which anchor bolt can you replace easily if you break it?

A

boxed

37
Q

The presents of voids can lead to?

A
  • the base plate twisting under load
  • the foundation cracking
  • soft foot
38
Q

What if you detect a void?

A

it must be filled

39
Q

What is a wedge?

A

its a taper piece of steel place between the base and the foundation of the machinery

40
Q

How should thick and thin shims be stacked?

A

Thicker ones at the bottom and thinner ones at the top

41
Q

Leveling feet are used on?

A

Small light weight equipements

42
Q

Can you level with a carpenter’s level?

A

No!– more precision is required

43
Q

A carpenter’s level can read an accuracy of?

A

.020 of an inch

44
Q

A precision or mechanics level has a sensitivity of?

A

.005 inches per foot

45
Q

A master precision level has a sensitivity of?

A

.0005 inch per foot

46
Q

What are the three mounting methods?

A
  • base plate or skid
  • on their own sole plate or steel support
  • mounted directly on the floor
47
Q

Foundations should rest on?

A
  • firm solid ground such as rock, hard clay and compacted gravel
  • a footing that covers a large area
  • and on piles
48
Q

Master precision levels should be picked up by the?

A

top plate

49
Q

What can affect both plumb bobs and vertical wires?

A

wind can affect both

50
Q

Which anchor is best suited for the edge of a concrete foundation?

A

Adhesives

51
Q

Expansion-type anchor bolts are popular for use on?

A

existing concrete floors and pads

52
Q

If anchor bolts are to be installed before the foundation concrete is poured, what is required?

A

a template - is required to line up the anchors bolts with holes in the machine base, sole plate or skid

53
Q

Reference lines are established from reference points such as?

A
  • centre line of machinery
  • elevation from plant
  • machinery bench mark
  • existing machine
54
Q

List three basic levelling devices

A
  • Spirit levels
  • Optical levels
  • Laser levels
55
Q

What do homemade grouts mixtures tend to do?

A

they shrink

First Year Millwright (9 decks)

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