433A Alignment and Levelling 2

Question 1

What is the rim and face method of shaft alignment?

Accepted Answer

Using dial indicators mounted on one shaft to read offset on the rim and angular misalignment on the face of the opposing coupling hub

Answer

Aligning shafts using a straightedge on the rim and a taper gauge on the face

Answer

Measuring the outside diameter and width of the coupling

Answer

A visual inspection method for rough alignment

Question 2

When shimming a machine for alignment, what is the maximum recommended number of shims under one foot?

Accepted Answer

3 to 5 shims

Answer

2 shims

Answer

10 shims

Answer

There is no limit

Question 3

What is the reverse indicator method of shaft alignment?

Accepted Answer

Mounting dial indicators on each shaft to read the rim of the opposite shaft's coupling hub

Answer

Reading indicators while rotating shafts in reverse direction

Answer

Reversing the motor leads to check alignment

Answer

Using indicators mounted upside down

Question 4

What effect does angular misalignment have on a flexible coupling?

Accepted Answer

It causes axial vibration at 1× and 2× running speed

Answer

No effect since the coupling compensates fully

Answer

It only affects the motor bearings

Answer

It causes the coupling to overheat but does not affect vibration

Question 5

Why are jackscrews (jacking bolts) important during alignment?

Accepted Answer

They allow precise, controlled horizontal positioning of the machine without hammering

Answer

They permanently secure the machine to the base

Answer

They eliminate the need for shims

Answer

They measure the amount of misalignment

Question 6

What is bore alignment used for?

Accepted Answer

Verifying the alignment of bearing bores along a long machine train or multi-bearing equipment

Answer

Aligning coupled shafts on a pump

Answer

Checking the bore of a coupling hub

Answer

Measuring bearing clearances