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The Associate CET Study Guide
Questions and Answers Rated A+
B+, or supply voltages in electronics products, is considered to be:
A. +5 to +12 VDC
B. 0 to 30 V DC
C. +12 to 300 V DC
D. The anode or plate voltage supply ✔✔D. The anode or plate voltage supply
Leakage current in an electronic product, between either of the AC power cord conductors and the chassis or any exposed metals should not exceed _________.
A. 5 microamps
B. 500 microamps
C. 5 milliamps
D. 50 milliamps ✔✔B. 500 microamps
Shaded components on the electronics schematics mean:
A. Only factory service personnel may change the part
B. Only exact replacement parts may be used
C. The shading makes for better readability
D. High voltage is present on these parts ✔✔B. Only exact replacement parts may be used
Ingested solder fumes when particles _______.
A. I'm not harmful to the human body
B. Are toxic
C. From lead-tin solder aren't harmful
D. From tin-alloys are most harmful ✔✔B. Are toxic
Second degree skin burns should ________.
A. Not be treated with ice and bandage pack
B. Be covered with thick bandages
C. Be treated with cold water or ice
If you have never receive formal training and practice CPR want a pricing or dummy, in the event of finding a fellow worker not breathing, you _________.
A. Should use what knowledge you do half of the procedure and attempt it
B. Should not attempt it, but call for help
C. Should attempt it after calling for help
D. Should, if handy, read the instructions and attempt in order to save the life ✔✔B. Should not
attempt it, but call for help
When working at heights above 6 feet, a ________ is required by OSHA rules.
A. Linesman's belt
B. Linesman's belt attached to a lanyard
C. Full body harness attached to a lanyard that prevents more than a 6 foot drop
D. Good insurance policy ✔✔C. Full body harness attached to a lanyard that prevents more than
a 6 foot drop
'Phantom' current is associated with ________.
A. Northern Lights
B. Corona arcing from electrical generators
C. Charge retained by inductors
D. Charge retained by capacitors ✔✔D. Charge retained by capacitors
The atomic number of an element is the same as the element's atomic weight.
A. True
B. False ✔✔B. False
An increase in the voltage with resistance held constant causes current to __________.
A. Decrease
B. Increase twice to value of voltage
C. Increase
D. None of the above ✔✔C. Increase
The ampere, expresses __________.
B. 20 ohms
C. 10 ohms
D. 5 ohms ✔✔A. 15 ohms
Maximum power transfer occurs when the low impedance is equal to the source impedance.
A. True
B. False ✔✔A. True
What will happen to the current through the resistor if the resistor value increases?
A. Current increases
B. Current remains unchanged
C. Current decreases
D. Car and the voltage across the resistor increases ✔✔C. Current decreases
Which type of circuit has the same voltage across each component?
A. Parallel
B. Series-parallel
C. Series
D. Combination ✔✔A. Parallel
Total power in a series circuit is determined by the:
A. Source voltage times the current
B. Total voltage applied
to the circuit
C. Current flowing through the switch
D. Average wattage rating of each resistor ✔✔A. Source voltage times the current
Which is the equivalent to 100 microamps?
A. .1 milliamps
B. 1 milliamps
C. 10 milliamps
A circuit has one 500 ohm resistor in series with three 500 ohm resistors that are connected in parallel with each other. The total resistance would be ____________.
A. 666 ohms
B. 167.7 ohms
C. 750 ohms
D. 1000 ohms ✔✔A. 666 ohms
The voltage rating of a capacitor ___________.
A. Must be factored into the resistance formula
B. Relates to the maximum voltage that should be applied to it
C. Indicates the maximum current the capacitor can allow
D. Is the same as the power factor ✔✔B. Relates to the maximum voltage that should be applied
to it
Calculating the total capacitance of several capacitors connected in parallel __________.
A. Is not necessary as they are not used this way
B. Causes a need to consider inductance factors
C. Is done by adding each of the capacitance values
D. Is the same as the power factor ✔✔C. Is done by adding each of the capacitance values
Ferrite __________.
A. Is a capacitor dielectric
B. Is a common inductor core material
C. Is the most common resistor coating
D. Causes faulty saturation of the inductors ✔✔B. Is a common inductor core material
The term Henry refers to __________.
A. The inductive property of a coil
B. The inventor of inductors
C. Reactance of LR circuits
D. Resonant frequency of the tank circuits ✔✔A. The inductive property of a coil
B. Red, violet, brown, gold
C. Red, violet, black, silver
D. Red, brown, black, silver ✔✔B. Red, violet, brown, gold
One microfarad is equivalent to __________ picofarads.
A. 10
B. 1000
C. 100,
D. 1,000,000 ✔✔D. 1,000,
The capacitance of a capacitor with 10μC of electric charge and 100V across its plates is __________.
A. 0.1μF
B. 10μF
C. 1000μF
D. 10⁷μF ✔✔A. 0.1μF
Total impedance in a series circuit is found by:
A. Adding up all the series existence in reactance values
B. Subtracting all the inductive reactance from all the capacitive reactance's and adding the resistors values
C. Finding the net reactance and the net resistance, square each separately, add them together and then find the square root of the sum
D. Divide the applied voltage by the addition of all the circuit components individual currents ✔✔C. Finding the net reactance and the net resistance, square each separately, add them together
and then find the square root of the sum
In a series AC circuit with a resistor, inductor and capacitor, each with the same resistance of reactance, a voltmeter measuring each individual voltage drop would find:
A. The voltage equal to each other
B. The reactance voltage of the capacitor or the inductor would be greater than the resistance voltage measurement
C. The resistance voltage would be higher than the voltage across the inductor or the capacitor
A 50KHz AC voltage is applied to a 10mH inductor, its reactance at this frequency is:
A. 3140 ohms
B. 300 ohms
C. 3100 ohms
D. 500 ohms ✔✔A. 3140 ohms
A .1μF capacitor in a circuit with frequency of 100 KHz applied has a reactance of:
A. 1.59 ohms
B. 15.9 ohms
C. 159 ohms
D. 15.9 kohms ✔✔B. 15.9 ohms
In a series circuit when the inductive reactances equal the capacitor reactances the circuit has __________ impedance.
A. Maximum
B. Double the inductor's
C. Minimum
D. No ✔✔C. Minimum
In a parallel circuit when the inductive reactances equal the capacitor reactances the circuit has __________ impedance.
A. Maximum
B. Double the inductor's
C. Minimum
D. No ✔✔A. Maximum
Resonance is when __________.
A. All resistances in an AC circuit are equal to each other
B. All reactances are equal on each reactive component
C. The total of the inductive reactances in the circuit equal the total of all capacitive reactances
An AC generator is also known as a __________.
A. Regulator
B. Alternator
C. Phaser
D. Slip ring ✔✔B. Alternator
Three-phase power is obtained from an AC generator by wiring the armature windings in a __________ or __________ configuration.
A. Alpha, beta
B. Treble, tri-phase
C. Polymorph, one-to-three
D. Delta, wye ✔✔D. Delta, wye
What element of a DC generator distinguishes it from a AC generator?
A. Slip rings
B. Commutator
C. Series wound field coil
D. Armature ✔✔B. Commutator
What type of motor will speed dangerously out of control if not physically load it?
A. Induction motor
B. Shunt wound DC Motor
C. Series wound DC Motor
D. Series wound AC motor ✔✔C. Series wound DC Motor
AC motor speed depends on __________.
A. The frequency of the voltage applied to it
B. The voltage level applied
C. The phase of the voltage applied to it
D. The power left in the dilithium ✔✔A. The frequency of the voltage applied to it
