CDC Electrical Systems Practice Test
Questions (5 Level)
What is the difference between the one-person and two-person pole top rescue?
a.There is no difference
b.Person on the ground takes over the rescue once the victim's rope has been cut by
performing first aid in the bucket truck
c.Ground man climbs as well
d.Person on the ground takes up slack in the rescue rope and controls the rate of
descent of the victim - ✔️✔️D
What happens to voltage in a series circuit?
a.In a series circuit, the sum of the voltages consumed by each individual resistance is
equal to the source voltage
b.In a parallel circuit, the sum of the voltages consumed by each individual resistance is
equal to the source voltage
c.In a series-parallel circuit, the sum of the voltages consumed by each individual
resistance is equal to the source voltage
d.In a series circuit, the sum of the current consumed by each individual resistance is
equa - ✔️✔️A
What does increasing the use of solid-state switching devices contribute to current
waveforms?
a.A regulated voltage waveform also known as a uni-sinusoidal waveform
b.A distorted voltage waveform also known as a bi-sinusoidal waveform
c.A distorted voltage waveform also known as a non-sinusoidal waveform
d.A regulated voltage waveform also known as a non-sinusoidal waveform - ✔️✔️C
Why is the substitution of defective foreign parts or materials for US standard parts a
good strategy?
a.Repair is always guaranteed using substitute parts and materials
b.Repairs might be completed more efficiently by modifying the original system
c.None of the above
d.Repair is always faster when using US standard parts as substitute - ✔️✔️B
What is the purpose of lockout/tagout?
a.Make work easier
,b.Comply with OSHA standards
c.Prevent hazardous energy sources from harming or killing the bystanders and
supervisors
d.Prevent hazardous energy sources from harming or killing the worker - ✔️✔️D
When performing a safe clearance, how are all sources of electrical energy verified to
be disconnected or otherwise prevented from energizing the equipment or circuits being
worked on?
a.By a qualified person operating the controls or otherwise verifying that the equipment
cannot be restarted
b.By a qualified person that used test equipment to test the circuit elements and
electrical parts of equipment to which employees will be exposed and verifying that the
circuit elements and equipment part - ✔️✔️D
Which of the following best describes a harmonic?
a.A current of the fundamental frequency of the system
b.A resistance at a multiple of the fundamental frequency of the system
c.A voltage or current at a multiple of the fundamental frequency of the system
d.A voltage of the fundamental frequency of the system - ✔️✔️C
Which of the following statement(s) is/are true about alternating current?
a.AC can easily be converted to DC with the use of rectifiers
b.AC may cause harmonics in the power system
c.All answers are correct
d.AC allows electrical power to be generated at low voltage and stepped up for
transmission over long distances - ✔️✔️C
What is the best example of an Emergency Corrective Maintenance scenario (Priority -
1)?
a.Unscheduled work that mitigates a risk to the mission
b.Unscheduled work that is low risk/low priority
c.Scheduled work that sustains the installation's as-is state
d.Scheduled sustainment work that increases CE funding - ✔️✔️A
Which of the following is true about conductors?
a.
All answers are correct
b.
It is a substance that easily allows a large number of free electrons to move through it
c.
,It is a material with a high measurement of conductance
d.
The more electrons that can be moved through the material make it a better conductor -
✔️✔️A
Why do digital circuit's electronic signals take on discrete values?
a.All answers are correct
b.To represent logical and numeric values
c.To divide current between the various components according to their resistance
d.To represent current or voltage that may vary continuously with time in order to
correspond to information - ✔️✔️B
Why should electricians know the procedures for manhole rescue?
a.The danger exists for too many people to be in the manhole and must be rescued
b.The danger exists for them to be injured or overcome by gas or lack of oxygen
c.It is required for upgrade training
d.So they can assist emergency services - ✔️✔️B
What can happen if a toxic environment is not removed from a confined space before or
during work?
a.Toxic environments have little to no effect on the attendant
b.Toxic atmosphere may cause impairment of judgement, unconsciousness and death
to the entrant
c.Toxic atmosphere may cause impairment of judgement, unconsciousness and death
to the attendant
d.Toxic atmosphere may cause a variety of symptoms but nothing serious - ✔️✔️B
Which of the following is true about electronic components?
a.All answers are correct
b.They tend to be smaller than electrical components
c.May contain hundreds or even thousands of tiny components
d.Most operate on 3-12 volts DC - ✔️✔️A
When an electromotive force is induced on a conductor by the magnetic field of a
nearby another conductor, then?
a.Inductance is produced
b.All answers are correct
c.Reactance is produced
d.Capacitance is produced - ✔️✔️A
, Why are ions not able to move around like free electrons and holes in a dipole?
a.Because two free electrons and one hole have been taken out of circulation
b.All answers are correct
c.Because diffusion of electrons across the junction, leaves pairs of positive ions near
the gate
d.Because they are fixed in the crystal structure due to the covalent bonding - ✔️✔️D
What is the primary purpose of reporting labor?
a.Show full workloads and cost requirements
b.Ensure CE is estimating work correctly
c.Assess a fair price to charge CE's reimbursable customers
d.Ensure CE craftsmen are being paid fairly - ✔️✔️A
How would the voltage be divided among resistors, if a 120VDC circuit has 2 resistors in
series, each with 20 ohms of resistance?
a.30 volts would be divide among the resistors
b.60 volts would be divide among the resistors
c.50 volts would be divide among the resistors
d.20 volts would be divide among the resistors - ✔️✔️B
What happens to the voltage in a parallel circuit?
a.In a series-parallel circuit, the voltage across each of the components is the same
b.In a parallel circuit, the sum of the voltages consumed by each individual resistance is
equal to the source voltage
c.In a series circuit, the voltage across each of the components is the same
d.In a parallel circuit, the voltage across each of the components is the same - ✔️✔️D
What is the importance of ventilation?
a.To remove oxygen from the confined space
b.To allow for the gases to escape
c.To add oxygen to the confined space
d.To allow for safe conditions in the confined space - ✔️✔️D
If voltage is generated by a chemical reaction inside a battery, what type of current is
produced?
a.Alternating current
b.Semi-direct current
c.Semi-alternating current
d.Direct current - ✔️✔️D
Questions (5 Level)
What is the difference between the one-person and two-person pole top rescue?
a.There is no difference
b.Person on the ground takes over the rescue once the victim's rope has been cut by
performing first aid in the bucket truck
c.Ground man climbs as well
d.Person on the ground takes up slack in the rescue rope and controls the rate of
descent of the victim - ✔️✔️D
What happens to voltage in a series circuit?
a.In a series circuit, the sum of the voltages consumed by each individual resistance is
equal to the source voltage
b.In a parallel circuit, the sum of the voltages consumed by each individual resistance is
equal to the source voltage
c.In a series-parallel circuit, the sum of the voltages consumed by each individual
resistance is equal to the source voltage
d.In a series circuit, the sum of the current consumed by each individual resistance is
equa - ✔️✔️A
What does increasing the use of solid-state switching devices contribute to current
waveforms?
a.A regulated voltage waveform also known as a uni-sinusoidal waveform
b.A distorted voltage waveform also known as a bi-sinusoidal waveform
c.A distorted voltage waveform also known as a non-sinusoidal waveform
d.A regulated voltage waveform also known as a non-sinusoidal waveform - ✔️✔️C
Why is the substitution of defective foreign parts or materials for US standard parts a
good strategy?
a.Repair is always guaranteed using substitute parts and materials
b.Repairs might be completed more efficiently by modifying the original system
c.None of the above
d.Repair is always faster when using US standard parts as substitute - ✔️✔️B
What is the purpose of lockout/tagout?
a.Make work easier
,b.Comply with OSHA standards
c.Prevent hazardous energy sources from harming or killing the bystanders and
supervisors
d.Prevent hazardous energy sources from harming or killing the worker - ✔️✔️D
When performing a safe clearance, how are all sources of electrical energy verified to
be disconnected or otherwise prevented from energizing the equipment or circuits being
worked on?
a.By a qualified person operating the controls or otherwise verifying that the equipment
cannot be restarted
b.By a qualified person that used test equipment to test the circuit elements and
electrical parts of equipment to which employees will be exposed and verifying that the
circuit elements and equipment part - ✔️✔️D
Which of the following best describes a harmonic?
a.A current of the fundamental frequency of the system
b.A resistance at a multiple of the fundamental frequency of the system
c.A voltage or current at a multiple of the fundamental frequency of the system
d.A voltage of the fundamental frequency of the system - ✔️✔️C
Which of the following statement(s) is/are true about alternating current?
a.AC can easily be converted to DC with the use of rectifiers
b.AC may cause harmonics in the power system
c.All answers are correct
d.AC allows electrical power to be generated at low voltage and stepped up for
transmission over long distances - ✔️✔️C
What is the best example of an Emergency Corrective Maintenance scenario (Priority -
1)?
a.Unscheduled work that mitigates a risk to the mission
b.Unscheduled work that is low risk/low priority
c.Scheduled work that sustains the installation's as-is state
d.Scheduled sustainment work that increases CE funding - ✔️✔️A
Which of the following is true about conductors?
a.
All answers are correct
b.
It is a substance that easily allows a large number of free electrons to move through it
c.
,It is a material with a high measurement of conductance
d.
The more electrons that can be moved through the material make it a better conductor -
✔️✔️A
Why do digital circuit's electronic signals take on discrete values?
a.All answers are correct
b.To represent logical and numeric values
c.To divide current between the various components according to their resistance
d.To represent current or voltage that may vary continuously with time in order to
correspond to information - ✔️✔️B
Why should electricians know the procedures for manhole rescue?
a.The danger exists for too many people to be in the manhole and must be rescued
b.The danger exists for them to be injured or overcome by gas or lack of oxygen
c.It is required for upgrade training
d.So they can assist emergency services - ✔️✔️B
What can happen if a toxic environment is not removed from a confined space before or
during work?
a.Toxic environments have little to no effect on the attendant
b.Toxic atmosphere may cause impairment of judgement, unconsciousness and death
to the entrant
c.Toxic atmosphere may cause impairment of judgement, unconsciousness and death
to the attendant
d.Toxic atmosphere may cause a variety of symptoms but nothing serious - ✔️✔️B
Which of the following is true about electronic components?
a.All answers are correct
b.They tend to be smaller than electrical components
c.May contain hundreds or even thousands of tiny components
d.Most operate on 3-12 volts DC - ✔️✔️A
When an electromotive force is induced on a conductor by the magnetic field of a
nearby another conductor, then?
a.Inductance is produced
b.All answers are correct
c.Reactance is produced
d.Capacitance is produced - ✔️✔️A
, Why are ions not able to move around like free electrons and holes in a dipole?
a.Because two free electrons and one hole have been taken out of circulation
b.All answers are correct
c.Because diffusion of electrons across the junction, leaves pairs of positive ions near
the gate
d.Because they are fixed in the crystal structure due to the covalent bonding - ✔️✔️D
What is the primary purpose of reporting labor?
a.Show full workloads and cost requirements
b.Ensure CE is estimating work correctly
c.Assess a fair price to charge CE's reimbursable customers
d.Ensure CE craftsmen are being paid fairly - ✔️✔️A
How would the voltage be divided among resistors, if a 120VDC circuit has 2 resistors in
series, each with 20 ohms of resistance?
a.30 volts would be divide among the resistors
b.60 volts would be divide among the resistors
c.50 volts would be divide among the resistors
d.20 volts would be divide among the resistors - ✔️✔️B
What happens to the voltage in a parallel circuit?
a.In a series-parallel circuit, the voltage across each of the components is the same
b.In a parallel circuit, the sum of the voltages consumed by each individual resistance is
equal to the source voltage
c.In a series circuit, the voltage across each of the components is the same
d.In a parallel circuit, the voltage across each of the components is the same - ✔️✔️D
What is the importance of ventilation?
a.To remove oxygen from the confined space
b.To allow for the gases to escape
c.To add oxygen to the confined space
d.To allow for safe conditions in the confined space - ✔️✔️D
If voltage is generated by a chemical reaction inside a battery, what type of current is
produced?
a.Alternating current
b.Semi-direct current
c.Semi-alternating current
d.Direct current - ✔️✔️D
