ITMC Preventive Maintenance & Troubleshooting 4

Question 1

A pneumatic cylinder is slow to extend but retracts at normal speed. The MOST likely cause is:

Accepted Answer

A restriction in the extend-side flow path or a leaking piston seal

Answer

Slow extension with normal retraction points to a restriction or internal piston seal leak on the extend side, reducing effective force and speed in one direction.

Question 2

When using a dial indicator to check shaft runout on a lathe, the total indicator reading (TIR) represents:

Accepted Answer

The total range from minimum to maximum reading over one full rotation

Answer

TIR (Total Indicator Reading) is the full range between the highest and lowest dial indicator values recorded during one complete shaft rotation.

Question 3

A conveyor belt is tracking to one side consistently. What is the MOST common PM adjustment to correct this?

Accepted Answer

Adjust the tail pulley to steer the belt back to center

Answer

Adjusting the tail (or training) pulley tilts it slightly, which steers the belt back toward the center of the conveyor.

Question 4

What is the significance of the P-F curve in predictive maintenance?

Accepted Answer

It represents the time between a detectable potential failure and functional failure

Answer

The P-F curve shows the interval between when a potential failure can first be detected (point P) and when functional failure occurs (point F), defining the window for predictive intervention.

Question 5

A technician is torquing bolts on a critical flange connection. The CORRECT procedure is to:

Accepted Answer

Tighten bolts in a star (cross) pattern in multiple passes to the final torque

Answer

A cross (star) pattern in multiple incremental passes ensures even load distribution across the flange and prevents warping or uneven gasket compression.

(ITMC) Industrial Technology Maintenance Certification Practice Test

(ITMC) Industrial Technology Maintenance Certification Practice Test

ITMC Preventive Maintenance & Troubleshooting 4