Alignment

Question 1

The most common type of misalignment is

Answer 1

Combination

Question 2

Misalignment can cause

Answer 2

Equipment damage, vibration, loss of production

Question 3

TorF Misalignment reduces the load on bearings

Answer 3

False

Question 4

TorF When machines are aligned properly, they produce no vibration.

Answer 4

False

Question 5

The correct term for the condition whereby a machine is not fully supported by its mounting foot is

Answer 5

Soft Foot

Question 6

Runout refers to

Answer 6

Eccentricity

Question 7

TorF Dial bar sag is significant only when large diameter couplings and large spans are involved.

Answer 7

False; it must always be checked

Question 8

How does end float affect rim and face alignment?

Answer 8

End float causes face readings (angularity) to be unreliable. It must be controlled when taking readings.

Question 9

Use elastomer shims to

Answer 9

Correct angular soft foot

Question 10

TorF Dial bar sag affects face readings in rim and face alignment.

Answer 10

False

Question 11

TorF When you take sweep readings, the sum of the horizontal readings should equal the sum of vertical readings (for each dial)

Answer 11

True; having the readings balance shows that there is no error coming from an incorrect dial bar clamping set up.

Question 12

TorF After an alignment is completed, jacking bolts should be left tightened in order to prevent accidental movement of the machine.

Answer 12

False

Question 13

In the rim and face formula, what does D represent?

Answer 13

The diameter of the circle of the face dial makes

Question 14

If dials were zeroed at 3 o’clock and rotated to 9 o’clock, what would need to be done if the face dial read zero and the rim dial read -24 mils.

Answer 14

Move 12 mils towards the datum line.

Question 15

When doing a vertical alignment, a positive face dial readings at 6 o’clock position indicates

Answer 15

The coupling gap is smaller at the bottom

Question 16

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

Answer 16

Four or fewer

Question 17

During a rim and face alignment, you obtained rim readings of 0 mils at 12 o’clock and 2 mils at 6 o’clock. Id the dial bar sag is 2 mils, what is the corrected vertical TIR rim?

Answer 17

4 mils

Question 18

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

Answer 18

The sign of the reading changes