Electrical Troubleshooting TPC 210
A control panel layout shows the... - ANS-physical arrangement of all components
A film of oil on the commutator does NOT... - ANS-prolong brush life
A good diode has a resistance that is... - ANS-low in one direction, high is the other
A latched electrical relay is an example of a... - ANS-device that is stable in both the
energized and de-energized conditions
A power installation drawing shows... - ANS-only power outlets
A riser diagram shows the... - ANS-power distribution wiring from input through output
A sequence of operation is used with... - ANS-an elementary diagram
Adding limit switches to the control circuit of a reversing motor provides... - ANS-over travel
protection
An open armature winding in a dc motor is indicated by... - ANS-a decrease in speed
Before you work on water-soaked electrical equipment, you should... - ANS-pull the fuses
and circuit breakers
Changing the number of magnetic poles in the stator of a squirrel cage motor permits the
motor to run... - ANS-at two or more fixed speeds
Cross-references to the different locations of limit switches in a diagram are provided by... -
ANS-arrows next to the symbols line number
Deterioration in a selenium rectifier is indicated by... - ANS-a gradual rise in the input current
Dimming HID lamps can cause... - ANS-color shift
Each motor in the plant should bear a permanent metal tag with the ______ stamped on it. -
ANS-company's inventory number
HID lamps require a ______ and ______ period. - ANS-start up; restrike
High temperature is an indication of a ______ pole-phase group in a polyphase stator. -
ANS-shorted
If a motor stops for no apparent reason and you are called to inspect the motor starter, the
first thing you should check is the... - ANS-trip levers on the thermal overload relays
If an electrical machine has several problems, you should correct ______ problem(s) before
trying the machine again. - ANS-only one
If one phase is shorted, the ammeter will indicate ... - ANS-a higher current than in the other
two phases
If you close the contacts of a motor controller and measure a potential difference of zero
between the motor terminal, the fault is probably in the... - ANS-controller
In a pneumatic circuit, leakage of air during the actuating part of the cycle... - ANS-can
usually be ignored
In addition to the locations of lighting and lighting panels, lighting diagrams show the
locations of... - ANS-telephone outlets
In the electronic timing relay, the time-delay assembly is connected in... - ANS-series with
the relay coil
Interchanging any two supply leads of a three phase motor... - ANS-reverses the direction
the motor runs
Mechanical linkages of motor contactors, relays, and solenoids should... - ANS-move freely
when the machine is turned on
A control panel layout shows the... - ANS-physical arrangement of all components
A film of oil on the commutator does NOT... - ANS-prolong brush life
A good diode has a resistance that is... - ANS-low in one direction, high is the other
A latched electrical relay is an example of a... - ANS-device that is stable in both the
energized and de-energized conditions
A power installation drawing shows... - ANS-only power outlets
A riser diagram shows the... - ANS-power distribution wiring from input through output
A sequence of operation is used with... - ANS-an elementary diagram
Adding limit switches to the control circuit of a reversing motor provides... - ANS-over travel
protection
An open armature winding in a dc motor is indicated by... - ANS-a decrease in speed
Before you work on water-soaked electrical equipment, you should... - ANS-pull the fuses
and circuit breakers
Changing the number of magnetic poles in the stator of a squirrel cage motor permits the
motor to run... - ANS-at two or more fixed speeds
Cross-references to the different locations of limit switches in a diagram are provided by... -
ANS-arrows next to the symbols line number
Deterioration in a selenium rectifier is indicated by... - ANS-a gradual rise in the input current
Dimming HID lamps can cause... - ANS-color shift
Each motor in the plant should bear a permanent metal tag with the ______ stamped on it. -
ANS-company's inventory number
HID lamps require a ______ and ______ period. - ANS-start up; restrike
High temperature is an indication of a ______ pole-phase group in a polyphase stator. -
ANS-shorted
If a motor stops for no apparent reason and you are called to inspect the motor starter, the
first thing you should check is the... - ANS-trip levers on the thermal overload relays
If an electrical machine has several problems, you should correct ______ problem(s) before
trying the machine again. - ANS-only one
If one phase is shorted, the ammeter will indicate ... - ANS-a higher current than in the other
two phases
If you close the contacts of a motor controller and measure a potential difference of zero
between the motor terminal, the fault is probably in the... - ANS-controller
In a pneumatic circuit, leakage of air during the actuating part of the cycle... - ANS-can
usually be ignored
In addition to the locations of lighting and lighting panels, lighting diagrams show the
locations of... - ANS-telephone outlets
In the electronic timing relay, the time-delay assembly is connected in... - ANS-series with
the relay coil
Interchanging any two supply leads of a three phase motor... - ANS-reverses the direction
the motor runs
Mechanical linkages of motor contactors, relays, and solenoids should... - ANS-move freely
when the machine is turned on
