NCCER Study Guide-Part 3\238 Questions and
Answers
in a guardrail system; the guardrail can be made of any of the following except? -
✅ Ropebanding
What is type USE cable primarily used for? -
✅ Direct burial in the earth
Electrical gloves should be inspected before each use to determine: -
✅ The maximum voltage they can stand.
Which of the following is the classified location where combustible fibers are always present? -
✅ Class 3, Division 1
As the load decreases on a squirrel cage induction motor; its power factor: -
✅ increases
When installing 4/0 and larger cables in a cable tray; the tray width must not be less than the sum of
the cable: -
✅ Diameters
All multimeters are capable of measuring: -
✅ Current, voltage, and resistance
What is the resultant distance between center bends for a 10 - inch offset at 15 degrees? -
✅ 38.7 inches
A current transformer has a rating of 4000:5. If 2000 amps loads is on the primary; the secondary
output would produce : -
✅ 2.5 amps
,What is the approximate developed length of a 40" radius 90° bend? -
✅ (DL = 1.57 × Radius)63"
A megohmmeter will be used to check a cable. The electrician must be sure that the circuit is -
✅ de energized and locked, tagged out, and tested
Which of the following factors is used to control the speed of an induction motor ? -
✅ Frequency
Electrical hand tools that use a regular 120v system must be 3 wire grounded unless the : -
✅ Tool is double insulated and is approved by an independent testing facility
If the potential across a circuit is 48 volts and the current is 5 amps the resistance of the current is? -
✅ 9.6 ohms
the drawing scale is most likely to be found in which of the following drawing locations? -
✅ the drawing title block
A UL listed rod type grounding electrode most have a minimum length of? -
✅ 8"
What is the minimum number of overload sensing units required for all three phase motor? -
✅3
In a circuit of pure capacitance; the current leads the voltage by an angle of? -
✅ 90 degrees
The standard unit for measuring the cross-sectional area of wire is the? -
✅ circular mil.
, The length of a bare copper conductor in a ground ring must be buried no less than 2.5 " below
grade and with a length of at least? -
✅ 20ft
When installing heating cables for anti-icing systems; cable patterns should be in a? -
✅ serpentine pattern
An auxiliary holding contact ( seal - in) on a NEMA starter is indicated by the terminal marking ? -
✅ A1 & A2
The neutral bus in a sub panel is: -
✅ bonded
The peak voltage in a nominal 120/208 VAC system is : -
✅ 208 V
THWN conductors have an outer jacket made of : -
✅ nylon
What is shown on a sectional drawing? -
✅ cutaway view of a building
Who is allowed to remove another electricians tag or lock from any valve;switch;or piece of
equipment without proper authorization? -
✅ no one
The main purpose of a revision block on an electrical drawing is to -
✅ Note any changes to the original drawings
Which of the following is the classified location where combustible vapors are always present? -
✅ Class 1 , Division 1
Answers
in a guardrail system; the guardrail can be made of any of the following except? -
✅ Ropebanding
What is type USE cable primarily used for? -
✅ Direct burial in the earth
Electrical gloves should be inspected before each use to determine: -
✅ The maximum voltage they can stand.
Which of the following is the classified location where combustible fibers are always present? -
✅ Class 3, Division 1
As the load decreases on a squirrel cage induction motor; its power factor: -
✅ increases
When installing 4/0 and larger cables in a cable tray; the tray width must not be less than the sum of
the cable: -
✅ Diameters
All multimeters are capable of measuring: -
✅ Current, voltage, and resistance
What is the resultant distance between center bends for a 10 - inch offset at 15 degrees? -
✅ 38.7 inches
A current transformer has a rating of 4000:5. If 2000 amps loads is on the primary; the secondary
output would produce : -
✅ 2.5 amps
,What is the approximate developed length of a 40" radius 90° bend? -
✅ (DL = 1.57 × Radius)63"
A megohmmeter will be used to check a cable. The electrician must be sure that the circuit is -
✅ de energized and locked, tagged out, and tested
Which of the following factors is used to control the speed of an induction motor ? -
✅ Frequency
Electrical hand tools that use a regular 120v system must be 3 wire grounded unless the : -
✅ Tool is double insulated and is approved by an independent testing facility
If the potential across a circuit is 48 volts and the current is 5 amps the resistance of the current is? -
✅ 9.6 ohms
the drawing scale is most likely to be found in which of the following drawing locations? -
✅ the drawing title block
A UL listed rod type grounding electrode most have a minimum length of? -
✅ 8"
What is the minimum number of overload sensing units required for all three phase motor? -
✅3
In a circuit of pure capacitance; the current leads the voltage by an angle of? -
✅ 90 degrees
The standard unit for measuring the cross-sectional area of wire is the? -
✅ circular mil.
, The length of a bare copper conductor in a ground ring must be buried no less than 2.5 " below
grade and with a length of at least? -
✅ 20ft
When installing heating cables for anti-icing systems; cable patterns should be in a? -
✅ serpentine pattern
An auxiliary holding contact ( seal - in) on a NEMA starter is indicated by the terminal marking ? -
✅ A1 & A2
The neutral bus in a sub panel is: -
✅ bonded
The peak voltage in a nominal 120/208 VAC system is : -
✅ 208 V
THWN conductors have an outer jacket made of : -
✅ nylon
What is shown on a sectional drawing? -
✅ cutaway view of a building
Who is allowed to remove another electricians tag or lock from any valve;switch;or piece of
equipment without proper authorization? -
✅ no one
The main purpose of a revision block on an electrical drawing is to -
✅ Note any changes to the original drawings
Which of the following is the classified location where combustible vapors are always present? -
✅ Class 1 , Division 1
