Group A
Current Limiting fuses are best for electrical circuits capable of producing.....
Fault Currents
The primary winding of a transformer is rated at 115 volts and the secondary winding is rated at 300 volts. the primary winding has 500 turns. How many turns does the secondary have?
1300
The purpose of an arc chute over a contractor on a panel board is to?
Help extinguish the electric arc
A transducer will.....
provide feedback
the correct device for connecting flexible rubber or neoprene multiple conductor cable to a switch box entry hole is?
A cable Grip
what is the next step in troubleshooting if the SCRs wont fire and there is a signal at 223 and 224 on the CFC logic board?
check for firing pulse on 15,16,17, and 18
To prevent damage to a current transformer the secondary winding must be
Short-Circuited
what is the maximum number of 90 degree bends which should be used in a run of conduit between points where the wire can be pulled?
4
on which of the following must you reverse connections when you change a cumulative compound DC motor to a differential compound motor
Series field
because of the manner in which a voltmeter is used, it must have.....
high resistance
If the primary coil of a transformer has more turns than the secondary
Step-Down Transformer
With 480 volts primary voltage. What would be the Primary current at full load for a secondary full load of 11.2 amps at 240 volts
5.6 Amps
when an alternating voltage is applied to a purely resistive circuit the.....
current is in phase with the voltage
when a DC motor does not come up to speed, the .....
field is too strong or the motor terminal voltage is too low
a pressure transducer can be used to measure......
weight
Dynamic Braking of a shunt DC motor is done by
Connecting a resistance across the armature
A hickey is used for.....
Bending conduit
To increase the amount of capacitance in a circuit, you must add....
another capacitor in parallel with the capacitor
what will happen to a shunt motor if a shunt field coil opens while the motor is running under light load?
It runs away
EIA, RS232C, ASCII, serial describe.....
Communication Interfaces
short circuits in any system are always accompanied by a sudden
Voltage decrease
what is the best way to identify control panel wires?
Use Wire Markers
In a step down 3 phase transformer with no terminal markings, what would indicate the low voltage winding outputs?
The diameter of the wires sticking out of the transformer
what should you test before putting into service a wet motor which has been dried out?
Insulation resisitance
Typical PLC programs are written in which language?
Ladder Logic