ITMC Mechanical Systems & Equipment Maintenance 3

Question 1

A hydraulic system pressure gauge reads normal but the actuator moves slowly. The most likely cause is:

Accepted Answer

Internal leakage past a worn control valve spool

Answer

Internal valve spool leakage allows flow to bypass the actuator, reducing speed while maintaining gauge pressure.

Question 2

When replacing a timing chain or belt, technicians must ensure the:

Accepted Answer

Timing marks on the crankshaft and camshaft are aligned

Answer

Proper alignment of timing marks ensures correct valve timing relative to piston position.

Question 3

A shaft keyway coupling transmits torque primarily through:

Accepted Answer

A key seated in mating keyways on the shaft and hub

Answer

The key transfers torque by bearing against the sides of the keyways cut into both the shaft and the hub.

Question 4

Which maintenance strategy uses real-time equipment condition data to schedule repairs only when needed?

Accepted Answer

Predictive maintenance

Answer

Predictive maintenance monitors equipment condition parameters to forecast failure and schedule intervention before breakdown.

Question 5

When tightening a bolted flange joint in a pressurized piping system, the correct procedure is to:

Accepted Answer

Tighten all bolts to 25% torque in a star (cross) pattern, then increase in stages

Answer

A cross-pattern, multi-pass torquing procedure ensures even gasket compression and prevents leaks.

(ITMC) Industrial Technology Maintenance Certification Practice Test