CET Exam Practice Questions With 100%
Verified Solutions
Rules describing the fire or toxicity retardant types of cabling which may be
installed in buildings is contained in _________.
a. NEC Article 770
b. UL 569B
c. TIA/EIA standard 578
d. NEMA code 1316 - ANSWER a. NEC Article 770
ESD and static discharge is most destructive to _______.
a. CMOS semiconductors
b. TTL semiconductors
c. Germanium PN junctions
d. Silicon PN junctions - ANSWER a. CMOS semiconductors
If you have never received formal training and practiced CPR on a person
or dummy, in the event of finding a fellow worker not breathing, you ____.
a. use what knowledge you have and attempt it
b. should not attempt, but call for help
c. should attempt after calling for help
d. read the instructions and attempt - ANSWER b. should not attempt, but
call for help
When working at heights above 6 feet, a ____ is required by OSHA rules.
a. linemen's belt
b. linemen's belt attached to a lanyard
c. full body harness attached to a lanyard which prevents more than 6' drop
d. good insurance policy - ANSWER c. full body harness attached to a
lanyard which prevents more than 6' drop
,Residual voltage is associated with ____.
a. Northern Lights
b. corona arcing from electrical generators
c. charge retained by inductors
d. charge retained by capacitors - ANSWER d. charge retained by
capacitors
Total impedance in a series circuit is found by:
a. adding up all series resistance and reactance values
b. subtracting all inductive reactances from all capactive reactances and
adding resistor values
c. finding net reactance and the net resistance, square each separately,
add together and then find square mroot of the sum
d. divide the applied voltage by the addition of all circuit components
individual currents - ANSWER c. finding net reactance and the net
resistance, square each separately, add together and then find square
mroot 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
d. The supply voltage would be measured across the resistor and the
voltage across the capacitor and across the inductor would measure 0V -
ANSWER a. The voltage equal to each other
Which of the following is not a characteristic of a series circuit?
a. circuit components have a division of the supply voltage
b. all components share one current
,c. energy is shared by reactive devices
d. there is a different level of current in the reactive components than in the
resistive components - ANSWER d. there is a different level of current in
the reactive components than in the resistive components
In an AC circuit, as the applied voltage frequency changes upward, the
inductive reactance in the circuit will:
a. Decrease
b. Increase
c. Stay the same
d. Either increase or decrease - ANSWER b. Increase
In an AC circuit, as the applied voltage frequency increases, the capacitive
reactance in the circuit will:
a. decrease
b. increase
c. stay the same
d. either increase or decrease - ANSWER a. decrease
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 - ANSWER a. 3140 ohms
A .1uF capacitor in a circuit with a frequency of 100 KHz applied has a
reactance of:
a. 1.59 ohms
b. 15.9 ohms
c. 159 ohms
d. 15.9 kohms - ANSWER 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 inductors
c. minimum
d. no - ANSWER c. minimum
In a parallel circuit when the inductive reactances equal the capacitor
reactances the circuit has ____ impedance.
a. maximum
b. double the capacitor's
c. minimum
d. no - ANSWER 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
d. No current is flowing through an AC circuit when a voltage is applied -
ANSWER c. The total of the inductive reactances in the circuit equal the
total of all capacitive reactances
____ cells are prone to battery memory.
a. zinc
b. NiCad
c. Alkaline
d. Lithium - ANSWER b. NiCad
A conducting loop in motion through magnetic lines of flux has a current
induced in it. The physical law that explains this is what?
a. Lenz's Law
Verified Solutions
Rules describing the fire or toxicity retardant types of cabling which may be
installed in buildings is contained in _________.
a. NEC Article 770
b. UL 569B
c. TIA/EIA standard 578
d. NEMA code 1316 - ANSWER a. NEC Article 770
ESD and static discharge is most destructive to _______.
a. CMOS semiconductors
b. TTL semiconductors
c. Germanium PN junctions
d. Silicon PN junctions - ANSWER a. CMOS semiconductors
If you have never received formal training and practiced CPR on a person
or dummy, in the event of finding a fellow worker not breathing, you ____.
a. use what knowledge you have and attempt it
b. should not attempt, but call for help
c. should attempt after calling for help
d. read the instructions and attempt - ANSWER b. should not attempt, but
call for help
When working at heights above 6 feet, a ____ is required by OSHA rules.
a. linemen's belt
b. linemen's belt attached to a lanyard
c. full body harness attached to a lanyard which prevents more than 6' drop
d. good insurance policy - ANSWER c. full body harness attached to a
lanyard which prevents more than 6' drop
,Residual voltage is associated with ____.
a. Northern Lights
b. corona arcing from electrical generators
c. charge retained by inductors
d. charge retained by capacitors - ANSWER d. charge retained by
capacitors
Total impedance in a series circuit is found by:
a. adding up all series resistance and reactance values
b. subtracting all inductive reactances from all capactive reactances and
adding resistor values
c. finding net reactance and the net resistance, square each separately,
add together and then find square mroot of the sum
d. divide the applied voltage by the addition of all circuit components
individual currents - ANSWER c. finding net reactance and the net
resistance, square each separately, add together and then find square
mroot 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
d. The supply voltage would be measured across the resistor and the
voltage across the capacitor and across the inductor would measure 0V -
ANSWER a. The voltage equal to each other
Which of the following is not a characteristic of a series circuit?
a. circuit components have a division of the supply voltage
b. all components share one current
,c. energy is shared by reactive devices
d. there is a different level of current in the reactive components than in the
resistive components - ANSWER d. there is a different level of current in
the reactive components than in the resistive components
In an AC circuit, as the applied voltage frequency changes upward, the
inductive reactance in the circuit will:
a. Decrease
b. Increase
c. Stay the same
d. Either increase or decrease - ANSWER b. Increase
In an AC circuit, as the applied voltage frequency increases, the capacitive
reactance in the circuit will:
a. decrease
b. increase
c. stay the same
d. either increase or decrease - ANSWER a. decrease
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 - ANSWER a. 3140 ohms
A .1uF capacitor in a circuit with a frequency of 100 KHz applied has a
reactance of:
a. 1.59 ohms
b. 15.9 ohms
c. 159 ohms
d. 15.9 kohms - ANSWER 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 inductors
c. minimum
d. no - ANSWER c. minimum
In a parallel circuit when the inductive reactances equal the capacitor
reactances the circuit has ____ impedance.
a. maximum
b. double the capacitor's
c. minimum
d. no - ANSWER 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
d. No current is flowing through an AC circuit when a voltage is applied -
ANSWER c. The total of the inductive reactances in the circuit equal the
total of all capacitive reactances
____ cells are prone to battery memory.
a. zinc
b. NiCad
c. Alkaline
d. Lithium - ANSWER b. NiCad
A conducting loop in motion through magnetic lines of flux has a current
induced in it. The physical law that explains this is what?
a. Lenz's Law
