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Study with the several resources on Docsity
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Earn points by helping other students or get them with a premium plan
A practice exam for the nccer (national center for construction education and research) electrical certification. It includes a series of multiple-choice questions covering various topics related to electrical systems and installations, along with the correct answers. This resource is designed to help individuals prepare for the nccer electrical exam by testing their knowledge and understanding of key concepts and regulations. It covers topics such as guardrail systems, circuit resistance, grounding electrodes, motor overload protection, capacitance, wire sizing, drawing interpretation, and electrical safety.
Typology: Exams
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In a guardrail system, the guardrails can be made of any of the following EXCEPT: a) pipe b) chain c) ropebanding d) cable - ANSWER>>Ropebanding If the potential across the circuit is 48 volts and the current is 5 amps the resistance of the circuit is: a) 4.8 ohms b) 9.6 ohms c) 48.0 ohms d) 96.0 ohms - ANSWER>>9..6 ohms A UL listed rod type grounding electrode must have a MINIMUM length of: a) 6' b) 8' c) 10' d) 20' - ANSWER>>8' What is the MINIMUM number of overload sensing units required for all three phase motors? a) 0 b) 1 c) 2 d) 3 - ANSWER>> In a circuit of pure capacitance, the current leads the voltage by an angle of:
a) 30 - degrees b) 45 - degrees c) 90 - degrees d) 180 - degrees - ANSWER>>90-degrees The standard unit for measuring the cross-sectional area of wire is the: a) circular mil b) square mil c) round mil d) radial mil - ANSWER>>Circular mil The drawing scale is MOST likely to be found in which of the following drawing locations? a) The lighting fixture schedule b) The symbol list c) The drawing title block d) The power riser diagram - ANSWER>>The drawing title block The length of bare copper conductor in a ground ring MUST be buried no less than 2.5' below grade and with a length of at least: a) 10 ft b) 20 ft c) 25 ft d) 50 ft - ANSWER>>20 ft When installing heating cables for anti-icing systems, cable pattern should be in a: a) criss-cross b) vertical zig-zag
c) front view of a building d) side view of a building - ANSWER>>Cutaway view of a building Who is allowed to remove another electrician's tag or lock from any valve, switch, or piece of equipment without proper authorization? a) an inspector b) no one c) any supervisor d) owner - ANSWER>>No one The MAIN purpose of a revision block on an electrical drawing is to: a) Note any changes to the original drawings b) identify the professional engineer c) indicate the location of the project d) provide a title for the drawing - ANSWER>>Note any changes to the original drawings Which of the following is the classified location where combustible vapors are always present? a) Class I Div I b) Class II, Div II c) Class II, Div I d) Class III, Div I - ANSWER>>Class I Div I