Advanced Alignment Review

Question 1

A tooling ball has a maximum angle of _____ degrees to work with.

Answer 1

95 degrees

benchmark gauges(tooling ball method), monitors the movement of bearing housings or machine casings with respect to the equipment foundation.

Question 2

When necking down a bolt, how much can you turn down the bolt?

Answer 2

No more than the minor diameter of the bolt.

Question 3

What does the term Bolt Bound refer to?

Answer 3

Bolt bound is the horizontal condition that occurs when the moveable machine is “bound” by the hold down bolts in the direction of movement needed to correct the horizontal alignment. Can neck down bolt, but no further than minor diameter.

Question 4

What is Run-out?

Answer 4

Shaft run-out is when a shaft rotates off centreline(wobbles)

Question 5

What can cause shaft run-out?

Answer 5

Bent shafts, bad bearings, many more.

Question 6

What would be used to ensure a structure is plumb?

Answer 6

Jig Transit

Question 7

When measuring elevations with optical tools, the highest elevation will have the ____________ reading.

Answer 7

Lowest

Question 8

With which dial alignment procedure is shaft end float a potential source of error?

Answer 8

Rim and Face

Question 9

What is coupling runout a measurement of?

Answer 9

Eccentricity

Question 10

Before starting the vertical portion of a cross dial alignment, a rough alignment must be completed. What should the horizontal readings taken by both dials measure less than? (remember the dials read 2x the error)

Answer 10

20 mils

Question 11

What is the maximum allowable soft foot amount for an alignment?

Answer 11

2 mils

Question 12

What is the purpose for taking a “sweep” reading?

Answer 12

To ensure proper installation of dials

Question 13

The instrument most commonly used to establish a straight reference line of sight is an:

Answer 13

Alignment Telescope

Question 14

When referring to alignment procedures, the term plumb refers to a reference aligned;

Answer 14

to the vertical plane

JIG TRANSIT

Question 15

The procedure for checking the plumb accuracy of a jig transit or a theodolite can be accomplished by using a:

Answer 15

Heavy plumb bob, hanging on a wire, in a bucket of oil

Question 16

The optical instrument most commonly used to measure angles in two planes is a;

Answer 16

Theodolite

Question 17

What accessory is required to perform a “bucking-in”?

Answer 17

Precision Lateral Adjuster

Question 18

What is thermal growth in alignment?

Answer 18

Thermal growth is the relative movement of one machine to another when at operating conditions.

Question 19

A quick hot alignment is:

Answer 19

Not very accurate.

Question 20

Proximity probes require;

Answer 20

Cooling water in the stands

Question 21

What are Dodd bars?

Answer 21

Dodd bars provide continuous, online monitoring, and uses proximity probes that fasten to permanently mounted brackets on the coupled machines housings.

image in module; pump and motor coupled together , a bar attached to both housings above shaft, transmitting to a computer from the 80s haha.

also known as Dynalign.

Question 22

What are instrumented couplings?

Answer 22

Electronic probes built into the coupling spacer. This arrangement provides online, continuous monitoring of coupling alignment and axial movement of the coupled shafts.

Question 23

True or False;
The graphing method is accurate when drawn correctly.

Answer 23

True
also;
· Gives a visual picture of the misalignment.
· A dial is zeroed at 12 o’clock and B at 6 o’clock. A read at 6 and B read at 12.
· Preferred method to manually account for thermal growth when growth in not the same at all feet.

Question 24

When working with lasers, what precaution should you take?

Answer 24

Do not look into the laser unless you want to be Stevie Wonder.

Question 25

Laser alignments do not require a good initial alignment(rough in).

Answer 25

This is a test question…. word for word(Jason)

Question 26

True or False;
DBS only affects Rim readings in vertical position

Answer 26

True

Question 27

Face (Axial) readings (R&F only) measure _____________. Rim readings measure _____________.

Answer 27

Face (Axial) readings (R&F only) measure ANGULARITY. Rim readings measure OFFSET.

Question 28

Face (Axial) readings are affected by _________ _______( ___ ________ ).

Answer 28

Face (Axial) readings are affected by axial float (end float)

Question 29

What is vertical and angular misalignment?

Answer 29

Vertical = —–_____ (supposed to represent 2 shafts, one higher than the other)

Angular = ______ / you get the idea

Question 30

What can be done to improve the accuracy of a rim and face, and a cross dial alignment?

Answer 30

Rim and Face - Larger D of face dial
Crossdial - larger X between dials

Question 31

True or false;
Dials read double the offset.

Answer 31

True

Question 32

To balance the dials, ______ + _______ = ________ + ___________

Answer 32

Balance dials – Top + Bottom = Side + Side

Question 33

A motor is to be aligned to a pump which is pumping hot liquid and expected to rise 0.005” on all supports. There is no
expected movement in the motor. To compensate for this thermal growth of the pump, the motor should be aligned:

Answer 33

+5 mils on motor to compensate for thermal growth of pump.

Question 34

For rough levelling you would use what kind of level?

Answer 34

Fish eye, or tubular bubble
in a tilting level?

Question 35

For precision levelling you would use what?

Answer 35

Coincidence Level
in a tilting level?

Question 36

true or false;
Rough level, bubble moves in direction of right thumb

Answer 36

FALSE;
Rough level, bubble moves in direction of LEFT thumb

Question 37

Focus; eye piece and objective

Answer 37

according to module;
Focus eyepiece first so you can see cross hairs as clear and dark as possible. Next, adjust the focusing knob while looking through the telescope until the object being sighted is in perfect focus.

Question 38

To maintain accuracy, it is important to keep the _______________ an equal distance from the backsight and the foresight.

Answer 38

instrument

Question 39

Backsight =

Answer 39

Back sight = Benchmark “the B’s stay together”

Normally, the reading that is first taken after setting up an optical instrument to shoot a level. For a backsight to be useful it must be referenced to a known elevation (usually a benchmark). A backsight is usually added to a known elevation to obtain the height of the instrument.

Benchmark - A relatively permanent mark established by surveying to establish a known elevation. Benchmarks are used by millwrights as reference points to set the final elevations of installed machinery.

Question 40

Foresight =

Answer 40

A sight taken to a location in order to determine its elevation. The foresight elevation is compared to the backsight elevation to determine its elevation. The foresight is usually subtracted from the height of the instrument to obtain a new unknown elevation.

Question 41

Be aware of how your graph is scaled.