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WorksheetsRME-PEC 2
Total questions: 25
Worksheet time: 8mins
One million volts can also expressed as __________.
a. 1 millivolt
b. 1 kilovolt
c. 1 megavolt
d. 1 microvolt
Resistance opposes the flow of current in a circuit and is measured in __________.
a. Farads
b. Joules
c. Ohms
d. Henrys
The Wheatstone bridge method is used for accurate measurements of __________.
Voltage
Amperage
Resistance
Wattage
Rheostats and potentiometers are types of __________ resistors.
a. Film
b. Variable
c. Fixed
d. Wirewound
A low power factor is commonly caused by __________. I. Induction motors II. Synchronous motors III. Fluorescent lights
a. III only
b. II & III only
c. I & III only
d. I, II& III
The electric pressure of a circuit would be the __________.
Voltage
Amperage
Resistance
Wattage
A function of a relay is to __________.
a. Turn on another circuit
b. Produce thermal electricity
c. Limit the flow of electrons
d. Create a resistance in the field winding
A minimum thickness of __________ inch/inches of concrete over conduits and raceways should be used to prevent cracking.
1
2
3
4
Unity power factor, which means that the current is in phase with the voltage, would be __________.
a. 0.50
b. 0.80
c. 0.10
d. 1.0
One of the disadvantages of indenter or crimp connectors is __________.
They must be re-crimped at each annual maintenance inspection.
That special tools are required to make the joint.
Eventually they will loosen.
They can only be used for copper conductors.
In solving series-parallel circuits, generally you would __________.
Treat it as a series circuit
Reduce it to its simplest form
Assume that all loads are equal
Treat it as a parallel circuit.
What percentage of the maximum (peak) voltage is the effective (R.M.S.) voltage?
a.100%
b. 70.7%
c. 63.7%
d. 57.7%
Multiple start buttons in a motor control circuit are connected in __________.
a. Series
b. Parallel
c. Series-parallel
d. None of these
Which of the following is true?
EMT may be treaded
The "white" colored conductor connected to the silver colored post on a duplex receptacle on a 120v two-wire branch circuit is called the "neutral" conductor.
Plastic water pipe is approved to be used for electrical conduit.
The screw shell of a lampholder may support a fixture weighing 6 pounds.
Resistance in a circuit may be __________. I. Resistance of the conductors II. Resistance due to imperfect contact
a. I only
b. II only
c. Both I & II
d. Neither I nor II
Which of the following is not true?
Equal currents flow in the branches of parallel circuits.
The total resistance of a parallel circuit is less than the smallest resistor in the circuit.
The total current in a parallel circuit is the sum of the branch currents.
In a parallel circuit, there is more than one path for the current flow.
A universal motor has brushes that ride on the __________.
a. Commutator
b. Stator
c. Inter-pole
d. Field
The voltage of a circuit is best defined as __________.
The potential between two conductors.
The greatest difference of potential between two conductors.
The effective difference of potential between two conductors.
The average RMS difference of potential between any two conductors.
Which of the following is not true?
An autotransformer may be used as part of the ballast for lighting circuits.
A branch circuit can never be supplied through an autotransformer.
The losses of the autotransformer are less than those of a two-coil transformer.
Autotransformers may be used as starting compensators for AC motors.
To fasten a box to a terra cotta wall you would use which of the following?
Wooden plugs
Lag bolt
Expansion bolt
Toggle bolt/rawl plugs
One of the disadvantages of indenter or crimp connectors is __________.
They must be re-crimped at each annual maintenance inspection.
That special tools are required to make the joint.
Eventually they will loosen.
They can only be used for copper conductors.
Electrical power is measure of __________.
a. Work wasted
b. Voltage
c. Rate at which work is performed
d. Total work performed
If a 240-volt heater is used on 120 volts, the amount of heat produced will be __________.
Twice as great
Four times as great
¼ as much
The same
The electric pressure of a circuit would be the __________.
Voltage
Amperage
Resistance
Wattage
How many kw hours are consumed by 25-60 watt light bulbs burning 5 hours in a 120v circuit?
a. 1.5
b. 180
c. 7.5
d. 75
