WITH DETAILED VERIFIED QUESTIONS &
ANSWERS GRADED A+
A(n) __________ is used to measure resistance. - ANSWER-Ohmmeter
What is the total measurement of voltage over the power source called? -
ANSWER-Applied Voltage
Rotary motion is the output of which electrical output device? - ANSWER-Motor
Current is measured in units of __________. - ANSWER-Amps
What step should be taken to correctly measure the resistance of a resistor that is
wired in a circuit? - ANSWER-Disconnect one end of the resistor
The resistance provided by an inductor in an AC circuit is called __________. -
ANSWER-Inductive reactance
What does hertz stand for on a sine wave graph? - ANSWER-Cycles per second
What is the total inductance of a series circuit if the power supply frequency is 60
Hz and 3 coils each have an inductance of 0.3 henrys? - ANSWER-0.9 Henrys
A common application of mutual inductance is found in a device called a
__________. - ANSWER-Transformer
What is the secondary voltage if the primary is 480VAC? (The primary coil have
300 turns and the secondary coil has 125 turns) * - ANSWER-200 VAC
Which of the following is not a component of a basic electrical circuit? -
ANSWER-Insulator
What is the thin insulator placed between the plates of a capacitor called? -
ANSWER-Dielectric
,One of the effects a capacitor has in a DC circuit is that it will __________. -
ANSWER-Charge to a voltage equal to the source voltage
Capacitance is measured in __________. - ANSWER-Farads
What is a drawing showing electrical symbols and paths? - ANSWER-Schematic
Current in a(n) __________ circuit is divided among the branches of the circuit. -
ANSWER-Parallel
When the wire or foil strip inside a fuse melts, the fuse is said to be _________. -
ANSWER-Blown
The potential difference between two points in a circuit is called __________. -
ANSWER-Voltage
To measure current through a component, the ammeter must be connected
__________ the component. - ANSWER-In series with
What creates an electric field and stores electricity? - ANSWER-Capacitor
What should you do before working on electrical equipment? - ANSWER-Preform
a lockout/tagout
What type of transformer is used to get two 60-volt lines from a 240-volt source? -
ANSWER-2:1 with center tap
What creates a magnetic field and stores energy? - ANSWER-Inductor
The minimum requirement for a complete electric circuit is a path that has -
ANSWER-a power source, load, and wires to connect it all
The Ohm's Law formula for calculating voltage is __________. - ANSWER-E = I
×R
The amount of voltage that is used by each load depends on the __________ of
each load. - ANSWER-Resistance
,What is the relationship of the applied voltage cross two electrical components in
parallel with each other? - ANSWER-They are the same
Which of the following is not a component of a transformer? - ANSWER-Plate
What input device is shown in the circuit - ANSWER-Left to right cell, switch,
lamp, cable Single Pole Single Throw Switch
A circuit that uses resistors to produce a voltage that is lower than the source
voltage is called a __________. - ANSWER-Voltage divider
What change occurs in a circuit powered by a battery when a parallel branch is
added?*
Voltage decreases
Current decreases
Current increases
Voltage increases - ANSWER-Current increases
Which of the following statements is not true about measuring the resistance of a
component that is connected in a circuit? *
Connect the leads across the component.
Turn off the power supply.
Disconnect one of the components leads from the circuit.
Make sure the power supply is on. - ANSWER-Make sure the power supply is on.
What is the total capacitance of three 25 microfarad capacitors in series? *
75 microfarads
25 microfarads
5 microfarads
8 microfarads - ANSWER-8 microfarads
What feature of a ground circuit creates a safe path for current? *
Provides a current return to source
Low resistance to ground
High resistance to ground
Creates an open circuit - ANSWER-Low resistance to ground
, In order to calculate the output voltage of a transformer, divide the input voltage by
the __________. *
Turns ratio
Resistance
Input current
Frequency - ANSWER-Turns ratio
What is the below symbol? - ANSWER-Coil
In the circuit shown, if the negative side of the battery is the common lead. which
point has the highest potential voltage? - ANSWER-1, r2, 2, r1, 3 is 1
Which of the following is a method to troubleshoot a transformer? - ANSWER-
Measuring the continuity of the coils
How many seconds will it take for a capacitor in a RC circuit to completely charge
if the the RC circuit has a time constant of .05 seconds? - ANSWER-0.25
When loads are connected in series, their individual resistances are __________.*
Divided
Added
Subtracted
Multiplied - ANSWER-Added
The concept of a magnetic field being formed around a conductor when current
flows through it is called __________.*
Flux
Capacitance
All of the above
Electromagnetism
None of the above - ANSWER-Electromagnetism
hat is the best way to verify that a piece of equipment is properly grounded?*
Measure for current in the ground conductor.
Touch the metal housing of the equipment.
Measure the resistance between the equipment ground and the main ground lug.