MSSC Maintenance Awareness Exam
Questions and Answers
try the breaker again - ANSWER-The next step is to check the wiring to the disconnect
and try the breaker again.
True - ANSWER-The minimum number of sets of contacts a motor starter has depends
on the number of power leads the motor requires.
overload clutch - ANSWER-The type of overload protection that protects the motor by
disconnecting it physically instead of electrically.
Rt = R1 + R2 + R3 - ANSWER-The formula used to calculate total series resistance.
Can be reset - ANSWER-An advantage of a circuit breaker over a fuse.
2 - ANSWER-For a high-voltage single-phase AC motor, only 2 motor wires connect to
the power lines.
Blow a fuse or trip a thermal overload - ANSWER-What event is most likely to occur if a
motor has an excessive load.
any - ANSWER-The total power in any electrical circuit is calculated by finding the sum
of the individual component power consumption.
provide a constant pressure to the circuit - ANSWER-A regulator is used in pneumatics
to provide a constant pressure to the circuit.
body composition - ANSWER-Not a standard way of describing a directional control
valve.
Use any container for compressed air - ANSWER-Not a pneumatic safety rule.
operator - ANSWER-The 3-way DCV spool is held in the energized position by the
operator.
element - ANSWER-Smaller dirt particles are removed from the air by the filter's
element.
Tee - ANSWER-A fitting that can connect two branch circuits to a single supply line.
, Directional Control Valve - ANSWER-DCV stands for Directional Control Valve.
add atmospheric pressure to the gauge pressure - ANSWER-To convert gauge
pressure to absolute pressure, add atmospheric pressure to the gauge pressure.
A restriction - ANSWER-The schematic symbol shown represents a restriction.
7000 kPa - ANSWER-The maximum pressure that the gauge shown can measure.
not passing - ANSWER-What condition is indicated by the block shown.
56 psi - ANSWER-What value is shown on the gauge.
Cylinder - ANSWER-The pneumatic component that provides straight line motion.
Piston/Rod - ANSWER-The assembly that moves inside the barrel-shaped body of a
cylinder.
An increase in downstream pressure - ANSWER-What causes the poppet of a pressure
regulator to close.
Pa - ANSWER-The S.I. unit for pressure.
Both are considered fluid systems - ANSWER-Which is considered a fluid system,
pneumatics or hydraulics.
supply line and actuator line - ANSWER-The two types of conductors used in a
pneumatic system.
springs - ANSWER-The 5-port, 3-position DCV is held in the mid-position by the
springs.
Torque on driven shaft - ANSWER-If the driver shaft has 633 ft-lbs torque, the torque on
the driven shaft will be 1899 ft-lbs.
Chain sag measurement - ANSWER-Measured midway between the sprockets.
Chain drive efficiency - ANSWER-Compared to a V-belt drive, a chain drive is more
efficient.
Basic components of a chain drive system - ANSWER-Chain, driver sprocket, and
driven sprocket.
Chain replacement length - ANSWER-A chain should be replaced when its length
becomes 3% longer than the original length.
Questions and Answers
try the breaker again - ANSWER-The next step is to check the wiring to the disconnect
and try the breaker again.
True - ANSWER-The minimum number of sets of contacts a motor starter has depends
on the number of power leads the motor requires.
overload clutch - ANSWER-The type of overload protection that protects the motor by
disconnecting it physically instead of electrically.
Rt = R1 + R2 + R3 - ANSWER-The formula used to calculate total series resistance.
Can be reset - ANSWER-An advantage of a circuit breaker over a fuse.
2 - ANSWER-For a high-voltage single-phase AC motor, only 2 motor wires connect to
the power lines.
Blow a fuse or trip a thermal overload - ANSWER-What event is most likely to occur if a
motor has an excessive load.
any - ANSWER-The total power in any electrical circuit is calculated by finding the sum
of the individual component power consumption.
provide a constant pressure to the circuit - ANSWER-A regulator is used in pneumatics
to provide a constant pressure to the circuit.
body composition - ANSWER-Not a standard way of describing a directional control
valve.
Use any container for compressed air - ANSWER-Not a pneumatic safety rule.
operator - ANSWER-The 3-way DCV spool is held in the energized position by the
operator.
element - ANSWER-Smaller dirt particles are removed from the air by the filter's
element.
Tee - ANSWER-A fitting that can connect two branch circuits to a single supply line.
, Directional Control Valve - ANSWER-DCV stands for Directional Control Valve.
add atmospheric pressure to the gauge pressure - ANSWER-To convert gauge
pressure to absolute pressure, add atmospheric pressure to the gauge pressure.
A restriction - ANSWER-The schematic symbol shown represents a restriction.
7000 kPa - ANSWER-The maximum pressure that the gauge shown can measure.
not passing - ANSWER-What condition is indicated by the block shown.
56 psi - ANSWER-What value is shown on the gauge.
Cylinder - ANSWER-The pneumatic component that provides straight line motion.
Piston/Rod - ANSWER-The assembly that moves inside the barrel-shaped body of a
cylinder.
An increase in downstream pressure - ANSWER-What causes the poppet of a pressure
regulator to close.
Pa - ANSWER-The S.I. unit for pressure.
Both are considered fluid systems - ANSWER-Which is considered a fluid system,
pneumatics or hydraulics.
supply line and actuator line - ANSWER-The two types of conductors used in a
pneumatic system.
springs - ANSWER-The 5-port, 3-position DCV is held in the mid-position by the
springs.
Torque on driven shaft - ANSWER-If the driver shaft has 633 ft-lbs torque, the torque on
the driven shaft will be 1899 ft-lbs.
Chain sag measurement - ANSWER-Measured midway between the sprockets.
Chain drive efficiency - ANSWER-Compared to a V-belt drive, a chain drive is more
efficient.
Basic components of a chain drive system - ANSWER-Chain, driver sprocket, and
driven sprocket.
Chain replacement length - ANSWER-A chain should be replaced when its length
becomes 3% longer than the original length.
