MSSC MAINTENANCE AWARENESS EXAM 2023-2024
ACTUAL EXAM 300 QUESTIONS AND CORRECT DETAILED
ANSWERS WITH RATIONALES (VERIFIED
ANSWERS)|AGRADE
Because of its design, an offset chain does not require a connecting link.
For this reason, it is normally used in? – ANSWER- Heavy load and low
speed applications
Multiple strand chains are used? – ANSWER- To transmit a great deal of
power
Compared to a V-belt drive, a chain drive? – ANSWER- Is more
efficient
In the process of installing a chain drive system, the motor and driven
component should be checked for a soft foot condition and excessive
run-out. The shaft run-out should be no more than? – ANSWER- 0.002
Chain sag is measured by rotating the sprockets so there is little or no
chain sag in the _ side and measuring the sag in the side. –
ANSWER- Taut, slack
A chain should be replaced when its length becomes __ longer than
the original length. – ANSWER- 3%
Chain sag is measured? – ANSWER- Midway between the sprockets
A special link used to reconnect a chain is called a _ link. –
ANSWER- Master
A chain puller is a tool used to hold two ends of a chain together while
the? – ANSWER- Master link is installed
When using a chain puller, the jaws are opened and closed by? –
ANSWER- A dial on top of the tool
The three components for a belt drive system are? – ANSWER- Belt,
driver sheave, driven sheave
Pitch is defined as the distance between a point and a? – ANSWERSimilar corresponding point
The pitch circle of a belt drive is? – ANSWER- The place in the belt
which represents the center of the force being transmitted by the belt
A belt drive having a 12 inch driver pulley and a 6 inch driven pulley
has a pulley ratio of? – ANSWER- 0.5
In the calculation of shaft speed and shaft torques of a belt drive system,
which of the following applies? – ANSWER- Shaft speeds are inversely
proportional to pitch diameters
The driven pulley in the belt drive system show is rotating at _ rpm.
- ANSWER- 1200
One important characteristic of a timing belt is? – ANSWER- It will not
slip during operation
The fractional horsepower (FHP) V-belt, also called a light duty belt is
designed for low power application below _ Hp. – ANSWER- 7.5 The V-belt should ride in the groove with its top near the top of
the sheave; the V-belt does not touch the of the sheave. –
ANSWER- High, bottom
A should be used to check for sheave groove wear. – ANSWERSheave gauge
The maximum allowable deflection force on a belt is __ than the
minimum deflection force. – ANSWER- 50% greater
Belt span is defined as the? – ANSWER- Distance between the points on
the sheaves where the belt touches each sheave
The most basic way to test the tension of a belt is to? – ANSWER- Your
sense of touch
When connecting a 3-phase motor the three lines (T1,T2 and T3) are
usually connected to _. – ANSWER- – L1, L2, and L3
Electricians use _ to prevent damage to electrical wiring
running to the machine. – ANSWER- – rigid and flexible conduit
When the wire or foil strip inside a fuse melts, the fuse is said to be
_. – ANSWER- – blown
The difference between a fuse and a circuit breaker is _. –
ANSWER- – circuit breakers can be reset and used again
The amount two electrical waveforms are out of phase is measured in
_. – ANSWER- – degrees
The type of overload protection that protects the motor by disconnecting
it physically instead of electrically is a(n) _. – ANSWER- –
overload clutch
Which of the following is an advantage of a circuit breaker over a fuse?
- ANSWER- – Can be reset
*T or F
The minimum number of sets of contacts a motor starter has depends on
the number of power leads the motor requires. – ANSWER- – True