Free Amazon Maintenance Technician Question and Answers

Question 1

When installing components in a pneumatic system, the proper order is:

Accepted Answer

Filter - Regulator - Lubricator

Answer

In a pneumatic system, the standard and most effective order for installing air preparation components is Filter, then Regulator, then Lubricator (FRL). The filter removes contaminants, the regulator controls the air pressure, and the lubricator adds a fine oil mist to lubricate moving parts, ensuring clean, controlled, and lubricated air for optimal system performance and longevity.

Question 2

It is possible that an AC power system's power factor WILL NOT be:

Accepted Answer

1.5

Answer

The power factor in an AC power system is a dimensionless quantity that always falls within the range of -1 to 1, inclusive. It represents the ratio of real power to apparent power. A value of 1.5 is outside this physically possible range, making it an invalid power factor for any AC system.

Question 3

Megohmmeters are typically employed to measure:

Accepted Answer

Insulation

Answer

A megohmmeter, often called a 'megger,' is a specialized type of ohmmeter used to measure very high electrical resistance. Its primary application is to test the integrity of electrical insulation in cables, motors, and other equipment. By applying a high DC voltage and measuring the resulting small current, it determines if the insulation is sufficient to prevent current leakage and ensure safety.

Question 4

A ______ is used to stop an AC solenoid from "humming"

Accepted Answer

Shading ring

Answer

AC solenoids can produce an audible 'hum' due to the alternating magnetic field causing the armature to vibrate at twice the line frequency. A shading ring, typically a short-circuited copper loop embedded in the pole face, creates a lagging magnetic flux. This lagging flux ensures that there is always some magnetic pull on the armature, even when the main AC flux momentarily drops to zero, thereby preventing vibration and eliminating the hum.

Question 5

Intermittent welding has the benefit of being:

Accepted Answer

More economical and easier to repair in case of failure

Answer

Intermittent welding, also known as skip welding or stitch welding, involves creating short, spaced-out weld segments rather than a continuous bead. This technique uses less filler material and consumes less energy, making it more economical. Additionally, if a weld fails, only the specific segment needs to be repaired or re-welded, which is often simpler and less time-consuming than repairing a long continuous weld.

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Free Amazon Maintenance Technician Question and Answers