NCCER 1-4 ELECTRICAL
A program that requires trainees to demonstrate the ability to perform job related tasks is known
as an - Answer- Competency Based
An electrical apprentice training program typically requires ______ total hours of OJT - Answer-
8,000
The standard that covers arc fault protection is - Answer- NFPA 70E
The primary mission of OSHA is to - Answer- Ensure that the employer maintains a safe
workplace.
If you see an unsafe condition on a job site you should - Answer- report it to a supervisor.
Which of the following is a correct statement about an employee's responsibilities - Answer- When
you have been given a responsibility, you should do it without waiting to be told.
Special enclosures are used in hazardous locations to safely contain. - Answer- Arcing
Industrial maintenance electricians should be able to disassemble and reassemble - Answer-
Magnetic Motor Starters
An apprenticeship program approved by the DOL office of apprenticeship requires ____ of
classroom training per year. - Answer- 144 hours
The standard that sets the minimum requirements for the safe installation of electrical systems is -
Answer- The NEC
High voltage rubber gloves must be electrically tested - Answer- Every 6 months
The major cause of death from electrical shock is - Answer- Fibrillation of the heart
The main factor that determines the outcome of an electrical shock is the - Answer- Amount of
current
According to OSHA portable tools and appliances do not need to be grounded... - Answer- If they
have an approved system of double insulation
All electrical equipment and lines should be considered ____ until determined otherwise - Answer-
Energized
When a barrier is used as a controlled access zone, it must be _____ from the edge - Answer- 6
feet
Batteries can be an explosion hazard because - Answer- Hydrogen mixed with air is explosive in
the proper concentration
,Before entering a confined space you must - Answer- be trained in confined space entry
procedures
Portable electric hand tools account for a large number of electrical shock injuries. One way to
prevent these types of accidents is by - Answer- Proper grounding of tools
When using a straight ladder, the side rails should extend at least _____ inches above the top
support point - Answer- 36"
An _______ is intended for the electrical protection of personnel - Answer- GFCI
What voltage is considered high voltage - Answer- 600v or more
_______ Rubber gloves are rated for applications up to 1,000v - Answer- Class 0
The first step to be completed before working on a circuit is to, - Answer- Check that the circuit is
tagged and locked out
The OSHA standards for the contruction industry are covered in CFR..... - Answer- CFR 1910 &
1926
After a hazard review is completed, __________ determine(s) the classification of a confined
space as a nonpermit or permit- required confined space - Answer- the supervisor and
project/safety managers
Specific data for a hazardous material is found in? - Answer- the MSDS
Which of the following is a true statement - Answer- You must be evaluated by a physician, fitted,
and thoroughly instructed in the use of respiratory protective devices if you are required to use
them
Rubber gloves can be damaged by - Answer- Hand creams
When working on de energized circuit that have capacitors installed the first thing that a qualified
individual should do is to - Answer- Short out all parts of the circuit with a shorting probe
A voltage of one volt applied across a resistance of one ohm produces a current of one amp. If the
voltage is doubled and the resistance is halved, then the current _____. - Answer- Increases four
times
A battery produces voltage using - Answer- chemical action
The force that causes electrons to flow is most commonly called - Answer- voltage
According to ohms law the amount of current in a circuit is equal to the - Answer- voltage divided
by the resistance
If a circuit has 10 amps of current and 12 ohms of resistance the applied voltage is, - Answer-
120v
,Which of the following is considered a good conductor of electricity - Answer- Copper
If the voltage source of a circuit supplies 240 volts and the resistance measures 5 ohms, the
current in the circuit is _____ amps - Answer- 48 amps
The power distribution component used to raise and lower voltage is the - Answer- Transformer
Which of the following values is measured by placing a meter in series with a load - Answer-
Current
If the resistance of a circuit is 100 ohms and the current is 5 amps the power is _____ watts -
Answer- 2,500 watts
If a circuit has a source voltage of 120v and a current of 10a, the power is ____ watts - Answer-
1,200 Watts
If the voltage source of a circuit is 120v and the resistance measures 2 ohms, the current in the
circuit is _____ amps - Answer- 60 amps
If the current in a circuit is 30 amps and the resistance is 8 ohms, the applied voltage is ______
volts - Answer- 240 volts
If the voltage source of a circuit supplies 240v and the resistance is 20 ohms the current _____
amps - Answer- 12 amps
If a circuit has an applied voltage of 480v and a current of 20 amps, the resistance is _____ ohms
- Answer- 24 ohms
The total resistance of four resistors in parallel with values of 3,5,20 and 50 ohms is - Answer-
1.66 ohms
The total resistance of three resistors in parallel with values of 5,20 and 50 ohms is - Answer- 3.7
ohms
A circuit with a voltage of 120 volts acorss five resistors in parallel, 5,14,21,25 and 100 ohms has
a total current of _____ amps - Answer- 44.3 Amps
The total resistance of three resistors in parallel with values of 5,7.5, and 15 ohms is _____ ohms -
Answer- 2.5 ohms
Given a current with a source of 100 volts connected across four parallel 100-ohm resistors, the
current through each resistor is _____ amp - Answer- 1 amp
The total current that will flow through three resistors in parallel 40, 90, and 75 ohms , that are
connected across a 100-volt source is ____ amps - Answer- 4.95 amps
Two resistances of 28 and 25 ohms are connected in parallel. In series with this combination is a
38-ohm resistance and in parallel with this combonation is a 24-ohm resistance. Given a voltage of
1,23 volts the total current flowing through the circuit is ______ milliamps - Answer- 75 Ma
, Which of the following best defines a parallel circuit - Answer- Each load is connected in a
separate current path of the circuit
In figure 1 the total resistance of the cirucit is ____ ohms (100 v source , 15,25,5,5 ohms) -
Answer- 24.17 ohms
In figure 1 ____ amps of current would flow through the circuit ( 100v source, 15,25,5,5 ohms) -
Answer- 4.14 amps
According to Kirchhoff's voltage law, the total voltage drop in a circuit is equal too the - Answer-
Voltage power source
A light bulb uses 12 watts of power when placed acorss a 12-v battery. Its resistance is ____
ohms - Answer- 12
In figure 1 What is the voltage drop across the parallel resistors - Answer- 17.3 volts
In figure 2, the apporximate total resistance of the circuit is _____ ohms (120v source , 15,5,20,10)
- Answer- 29 ohms
In figure 2, if r3 was removed from the circuit ___ amps of current would flow through the circuit
(120v source, 15,5,10) - Answer- 4 amps
The main purpose of the NEC is to - Answer- Specify the minimum provisions necessary for
protecting people and property from electrical hazards
The organization that sponsors the NEC today is the - Answer- National Fire Protection
Association
Mandatory Rules are - Answer- Rules containing the words shall or shall not that electrician must
below
Permissive rules are - Answer- Rules that identify actions that are allowed but not required, such
as optional or alternative methods
NEC Article 90 - Answer- An introduction to the NEC that provides an overview of the book
NEC article 100 - Answer- Definitions used in the NEC
NEC Chapter 9 contains - Answer- Tables
The requirements for special occupancies, equipment, and conditions are covered in - Answer-
NEC chapters 5,6,7
The first section of any article covers the scope of the article and the second section typically
contains - Answer- Definitions specific to that article
The role of testing laboratories - Answer- Test products to ensure safety and compliance with
established standards
A program that requires trainees to demonstrate the ability to perform job related tasks is known
as an - Answer- Competency Based
An electrical apprentice training program typically requires ______ total hours of OJT - Answer-
8,000
The standard that covers arc fault protection is - Answer- NFPA 70E
The primary mission of OSHA is to - Answer- Ensure that the employer maintains a safe
workplace.
If you see an unsafe condition on a job site you should - Answer- report it to a supervisor.
Which of the following is a correct statement about an employee's responsibilities - Answer- When
you have been given a responsibility, you should do it without waiting to be told.
Special enclosures are used in hazardous locations to safely contain. - Answer- Arcing
Industrial maintenance electricians should be able to disassemble and reassemble - Answer-
Magnetic Motor Starters
An apprenticeship program approved by the DOL office of apprenticeship requires ____ of
classroom training per year. - Answer- 144 hours
The standard that sets the minimum requirements for the safe installation of electrical systems is -
Answer- The NEC
High voltage rubber gloves must be electrically tested - Answer- Every 6 months
The major cause of death from electrical shock is - Answer- Fibrillation of the heart
The main factor that determines the outcome of an electrical shock is the - Answer- Amount of
current
According to OSHA portable tools and appliances do not need to be grounded... - Answer- If they
have an approved system of double insulation
All electrical equipment and lines should be considered ____ until determined otherwise - Answer-
Energized
When a barrier is used as a controlled access zone, it must be _____ from the edge - Answer- 6
feet
Batteries can be an explosion hazard because - Answer- Hydrogen mixed with air is explosive in
the proper concentration
,Before entering a confined space you must - Answer- be trained in confined space entry
procedures
Portable electric hand tools account for a large number of electrical shock injuries. One way to
prevent these types of accidents is by - Answer- Proper grounding of tools
When using a straight ladder, the side rails should extend at least _____ inches above the top
support point - Answer- 36"
An _______ is intended for the electrical protection of personnel - Answer- GFCI
What voltage is considered high voltage - Answer- 600v or more
_______ Rubber gloves are rated for applications up to 1,000v - Answer- Class 0
The first step to be completed before working on a circuit is to, - Answer- Check that the circuit is
tagged and locked out
The OSHA standards for the contruction industry are covered in CFR..... - Answer- CFR 1910 &
1926
After a hazard review is completed, __________ determine(s) the classification of a confined
space as a nonpermit or permit- required confined space - Answer- the supervisor and
project/safety managers
Specific data for a hazardous material is found in? - Answer- the MSDS
Which of the following is a true statement - Answer- You must be evaluated by a physician, fitted,
and thoroughly instructed in the use of respiratory protective devices if you are required to use
them
Rubber gloves can be damaged by - Answer- Hand creams
When working on de energized circuit that have capacitors installed the first thing that a qualified
individual should do is to - Answer- Short out all parts of the circuit with a shorting probe
A voltage of one volt applied across a resistance of one ohm produces a current of one amp. If the
voltage is doubled and the resistance is halved, then the current _____. - Answer- Increases four
times
A battery produces voltage using - Answer- chemical action
The force that causes electrons to flow is most commonly called - Answer- voltage
According to ohms law the amount of current in a circuit is equal to the - Answer- voltage divided
by the resistance
If a circuit has 10 amps of current and 12 ohms of resistance the applied voltage is, - Answer-
120v
,Which of the following is considered a good conductor of electricity - Answer- Copper
If the voltage source of a circuit supplies 240 volts and the resistance measures 5 ohms, the
current in the circuit is _____ amps - Answer- 48 amps
The power distribution component used to raise and lower voltage is the - Answer- Transformer
Which of the following values is measured by placing a meter in series with a load - Answer-
Current
If the resistance of a circuit is 100 ohms and the current is 5 amps the power is _____ watts -
Answer- 2,500 watts
If a circuit has a source voltage of 120v and a current of 10a, the power is ____ watts - Answer-
1,200 Watts
If the voltage source of a circuit is 120v and the resistance measures 2 ohms, the current in the
circuit is _____ amps - Answer- 60 amps
If the current in a circuit is 30 amps and the resistance is 8 ohms, the applied voltage is ______
volts - Answer- 240 volts
If the voltage source of a circuit supplies 240v and the resistance is 20 ohms the current _____
amps - Answer- 12 amps
If a circuit has an applied voltage of 480v and a current of 20 amps, the resistance is _____ ohms
- Answer- 24 ohms
The total resistance of four resistors in parallel with values of 3,5,20 and 50 ohms is - Answer-
1.66 ohms
The total resistance of three resistors in parallel with values of 5,20 and 50 ohms is - Answer- 3.7
ohms
A circuit with a voltage of 120 volts acorss five resistors in parallel, 5,14,21,25 and 100 ohms has
a total current of _____ amps - Answer- 44.3 Amps
The total resistance of three resistors in parallel with values of 5,7.5, and 15 ohms is _____ ohms -
Answer- 2.5 ohms
Given a current with a source of 100 volts connected across four parallel 100-ohm resistors, the
current through each resistor is _____ amp - Answer- 1 amp
The total current that will flow through three resistors in parallel 40, 90, and 75 ohms , that are
connected across a 100-volt source is ____ amps - Answer- 4.95 amps
Two resistances of 28 and 25 ohms are connected in parallel. In series with this combination is a
38-ohm resistance and in parallel with this combonation is a 24-ohm resistance. Given a voltage of
1,23 volts the total current flowing through the circuit is ______ milliamps - Answer- 75 Ma
, Which of the following best defines a parallel circuit - Answer- Each load is connected in a
separate current path of the circuit
In figure 1 the total resistance of the cirucit is ____ ohms (100 v source , 15,25,5,5 ohms) -
Answer- 24.17 ohms
In figure 1 ____ amps of current would flow through the circuit ( 100v source, 15,25,5,5 ohms) -
Answer- 4.14 amps
According to Kirchhoff's voltage law, the total voltage drop in a circuit is equal too the - Answer-
Voltage power source
A light bulb uses 12 watts of power when placed acorss a 12-v battery. Its resistance is ____
ohms - Answer- 12
In figure 1 What is the voltage drop across the parallel resistors - Answer- 17.3 volts
In figure 2, the apporximate total resistance of the circuit is _____ ohms (120v source , 15,5,20,10)
- Answer- 29 ohms
In figure 2, if r3 was removed from the circuit ___ amps of current would flow through the circuit
(120v source, 15,5,10) - Answer- 4 amps
The main purpose of the NEC is to - Answer- Specify the minimum provisions necessary for
protecting people and property from electrical hazards
The organization that sponsors the NEC today is the - Answer- National Fire Protection
Association
Mandatory Rules are - Answer- Rules containing the words shall or shall not that electrician must
below
Permissive rules are - Answer- Rules that identify actions that are allowed but not required, such
as optional or alternative methods
NEC Article 90 - Answer- An introduction to the NEC that provides an overview of the book
NEC article 100 - Answer- Definitions used in the NEC
NEC Chapter 9 contains - Answer- Tables
The requirements for special occupancies, equipment, and conditions are covered in - Answer-
NEC chapters 5,6,7
The first section of any article covers the scope of the article and the second section typically
contains - Answer- Definitions specific to that article
The role of testing laboratories - Answer- Test products to ensure safety and compliance with
established standards
