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WorksheetsAC Fundamentals
Total questions: 35
Worksheet time: 25mins
The law of charges states (in part) that like _______ _____.
(a)
The Law of Charges also states that positive charges attract.
True
False
The strength of the voltage to be produced depends on these factor except.
The number of turns in the coil of wire
The number of turns in the coil of the core
The strength of the magnetic field
The speed at which the magnetic lines of flux pass through the coil
If the voltage causes electrons to flow toward the generating source, the voltage is negative. This is known as (a) .
A sine wave is a graphical representation of what happing to voltage in an AC circuit at a point in time
True
False
How many times does the sine wave hit zero in 1 cycle?
2
15
3
9
One rotation is referred to as a (a)
The number of times a generator rotates in one second is known as the (a) .
Frequency is measured in ?
Ohms
Coloumbs
Hertz
Joules
The frequency of power in the US and Canada is 60 Hz.
True
False
RMS or effective value is value of AC voltage that will produce the same amount of power as a like value of DC voltage.
True
False
.707 x Peak Voltage =
(a)
Peak voltage is RMS x .707
True
False
If Peak Voltage is 10,184 volts, what is the RMS value
(a)
If the voltage and current rise and fall at the same time, they are said to be
(a)
AC circuits can have 3 types of loads, resistive, capacitive and __________.
Transmitted
Coupled
Reactive
Inductive
Without a complete path, electrons are unable to flow through a conductor and provide power. This is known as an
short circuit
closed circuit
open circuit
complete circuit
A circuit that does not have a load, or in which the load has been bypassed, is known as a
(a)
A short circuit has very _____ resistance
Low
high
strong
weak
If too much current flows, the capacity of the conductor will be exceeded and the conductor will
sag
tighten
melt
stay the same
There are two basic types of circuits. Series and parallel.
True
False
The simpliest type of circuit is the
(a)
This type of circuit has multiple paths for current to flow
Parallel
Series
Loop
Radial
As a lineworker you should never place yourself in (a) between two points of different potential
Current is _____ at any point in a series circuit.
the same
lower
higher
Each load connected in a parallel circuit will have a voltage drop equal to the
(a)
Induction only occurs when the magnetic field expands and collapses.
True
False
This ability of a conductor to oppose a change in current is known as
(a)
Inductance is increased by coiling the conductor. The greater the number of turns on the conductor, the greater is the inductance.
True
False
VAR's is an abbreviation for
(a)
Capacitors are installed on AC circuits to correct
(a)
The ability of a capacitor to limit current flow is known as
inductive reactance
capacitive reactance
resistance
Line Voltage = Phase voltage / 1.732
True
False
Delta and 3 wire Wye systems look the same, both have 3 wires and no neutral
True
False
the (a) wire WYE system is the most widely used system.
