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YEAR 1 FINAL JATC EXAM QUESTIONS WITH DETAILED VERIFIED
ANSWERS (LATEST 2026|2027 UPDATES) ALREADY GRADED A+
What are two recognized means of preventing injury during electrical equipment operations? - Correct Answer - Grounding Insulation Which of the following would not be a factor that determines the severity of an electric shock? I. The amount of current flowing through the body II. The current's path through the body III. The length of time the body remains in the circuit IV. The current's frequency - Correct Answer - All are factors that determine the severity of an electric shock. Burns are the most common shock-related injury. An electrical accident can result in an electrical burn, arc burn, thermal contact burn, or a combination of burns. - Correct Answer - True ? are devices that interrupt the flow of electricity within as little as 1/40 of a second to prevent electrocution. - Correct Answer - Ground-fault circuit interrupters How often do electrocutions occur in the United States? - Correct Answer - 1 per week
Occupational Safety & Health Administration (OSHA) places the threshold voltage of electric shock at?. - Correct Answer - 50 V What is the limited approach boundary distance for an exposed fixed circuit part on a 480Y/277-volt distribution panel? - Correct Answer - 3'6" To ensure adequate protection, a(n)? must be calculated on the basis of the amount of current present if a short circuit occurs, the time the arc is allowed to burn, and the distance the worker is from the arc. - Correct Answer - flash hazard analysis Which National Fire Protection Association (NFPA) document covers safe working practices for electrical work? - Correct Answer - NFPA 70E Flame-resistant clothing is designed for the amount of heat that could be present. This heat is expressed in calories per square centimeter of "incident energy." - Correct Answer - True A(n)? GFCI requires the amount of current leaving the source and returning to the source to be within 5 mA of each other. - Correct Answer - Class A
To find the area of a wire in circular mils, square the diameter expressed in? - Correct Answer - mils Name the two basic types of pressure connectors. - Correct Answer - Compression-type (applied with a tool and die) Mechanical screw-type A coating of joint compound on the surface of a conductor, prevents a(n)? from reforming after the installation process. - Correct Answer - oxide During the process of terminating aluminum conductors in a mechanical screw-type connector, and after stripping the insulation off the conductor, the installer should? the conductor and apply a(n)? on the exposed aluminum conductor(s). - Correct Answer - wire brush / listed aluminum joint compound Most? are supplied by the manufacturer already filled with joint compound to seal the connector from moisture and other contaminants. - Correct Answer - compression connectors When the prefix? is used, it means multiply the number by 1,000. - Correct Answer - kilo When the prefix milli is used, it means multiply the number by?. - Correct Answer - 0.
When converting from a whole number to a prefixed number,? the whole number by the value of the?. - Correct Answer - divide / prefix When converting from one prefixed number to another,? the number by the value of the first prefix and? that value by the value of the prefix to which you are converting. - Correct Answer - multiply / divide Match the following powers of 10 to the correct units. - Correct Answer - 1 × 10^0 → unit 1 × 10^1 → deka 1 × 10^2 → hecto 1 × 10^3 → kilo 1 × 10^6 → mega 1 × 10^- 3 → milli The decimal system of numbers is based on the number?. - Correct Answer - ten The prefix deci means?. - Correct Answer - tenth
In underground conduit applications, the cable should? - Correct Answer - be listed for wet locations Which statements are true in terms of aluminum conductors? - Correct Answer - They are typically compact stranded. They are lighter than copper conductors. The most common sizes for steel fish tapes are 1/8" and 1/4". - Correct Answer - True Despite the fact that aluminum is not as good a conductor as copper, its reduced? is compensated by the considerable cost savings in using aluminum conductors. - Correct Answer - conductivity Because the surface of aluminum conductors oxidizes readily, terminations are generally made with the aid of? designed to prevent the oxide from re-forming in the installation process. - Correct Answer - joint components Which of the following items should be read first on every lesson? - Correct Answer - Introductory Information
A competent electrician is one who has ___ , __ , and a positive ___ for his or her trade. - Correct Answer
- skill / knowledge / attitude The nucleus of what was to become the IBEW was formed in? in the city of?. - Correct Answer - 1890 / St. Louis The? Act of 1935 is more commonly referred to as the Wagner Act. - Correct Answer - National Labor Relations Worker? on the job is a major reason that job tasks cannot be performed in a timely manner. - Correct Answer - Absenteeism ? and? are critically important to jobsite safety. a. - Correct Answer - Awareness / common sense What are the three most important things to remember with regards to work safety? I. Work aware. II. Work effectively. III. Work productively.
Since the ratios for sides of triangles are the same, when the angles are the same,? have been developed which show these ratios for every angle encountered in a triangle. - Correct Answer - trigonometric tables The sine of θ is equal to the? divided by the?. - Correct Answer - opposite / hypotenuse The cos θ is equal to the? side divided by the?. - Correct Answer - adjacent / hypotenuse The tan θ is equal to the? side divided by the? side. - Correct Answer - opposite / adjacent What will happen if the time is not taken to properly measure and lay out a job before trying to bend conduit? - Correct Answer - I. Additional labor to re-bend II. Conduit may need to be bent multiple times as a result of inaccurate measurements IV. Increased amount of scrapped conduit The only viable method to reduce the material cost itself is to reduce waste, and the only practical way of doing that is to be skilled in measuring, calculating, and laying out the conduit bends. - Correct Answer - True
What tool can be used to prevent an off-axis between bends in an offset (dog-legs)? - Correct Answer - No-dog level A lightweight metallic raceway without threads is called? in the National Electrical Code. - Correct Answer - Electrical Metallic Tubing PVC is a form of what type of conduit? - Correct Answer - rigid non-metallic conduit Match the conduit/size with the appropriate protective cap. - Correct Answer - 1/2" Rigid Metal Conduit (RMC) → Black 3/4" Rigid Metal Conduit (RMC) → Red 1" Rigid Metal Conduit (RMC) → Blue According to NEC Section? ,? shall not be threaded. - Correct Answer - 358.28(B) / EMT Which types of conduit are typically threaded in order to couple them together or connect them to boxes or fittings? - Correct Answer - I. IMC II. RMC
connector, it will be necessary to subtract a slight amount (1/16 to1/8 inch) to compensate for the ridge at the bottom of the connector. A temporarily inserted conduit has been installed for a measurement. - Correct Answer - Even though it appears that the actual value required is 17 15/16", it is best to shorten the measurement slightly to compensate for the fact that the connector will not allow the end of the conduit to be inserted even with the side of the box. The Correct Answer is: 17 7/8" A back-to-back 90° bend has been fabricated in 3/4 " EMT to connect a junction box and a disconnect switch. The tops of both enclosures are at the same height. In laying out this bend, it is necessary to determine the distance between the connector on the box and the connector on the switch. The right side of the conduit connector (junction box) will be used to make the measurement. - Correct Answer - False Note: The mark will be on the left side of the connector at the point where the back of the bend goes into the connector; "back-to-back" measurements are taken to the outside of the bends, not the inside. When making a back-to-back bend, what benchmark on the bender must be aligned with the pencil mark in order to make the second bend using the bender in the reversed direction? - Correct Answer - star What is the most common angle used when making offsets? - Correct Answer - 30° The measured rise method for bending an offset should be used when the angle of the bend cannot be predicted or measured accurately. - Correct Answer - True
When making an offset, the bender must face in opposite directions for both bends. - Correct Answer - False Note: The bender must face in the same direction for both bends. Which benchmark on the bender is typically used when making offsets? - Correct Answer - the arrow Match the offset multiplier with the correct bend angle for the following angles. - Correct Answer - 1.4 → 45 ° 2 → 30 ° 2.6 → 22 1/2° 3.86 → 15 ° 5.76 → 10 ° 11.4 → 5 ° The most common center bend angle for a three-bend saddle is?. - Correct Answer - 45° Which of the following measurements must be known before a three-bend saddle can be fabricated? - Correct Answer - Distance to the center of the obstruction
environment, and the heat generated by adjacent current-carrying conductors. - Correct Answer - ambient / internal Copper conductors are available as hard-drawn, medium-hard-drawn, and soft-drawn. Hard-drawn copper has the greatest strength, but is difficult to work with. Because of the difficulty in shaping hard- drawn copper, its uses are limited. - Correct Answer - True A Journeyman is told to run a three-inch conduit across a room and decides to use a channel-iron system. The apprentice suggests that one-hole straps might be quicker. What might happen? - Correct Answer - The Journeyman should explain the reasoning behind his or her decision. The apprentice should respect the Journeyman's experience and should defer to the Journeyman. ? is a keen sense of what to do or say in order to maintain good relations with others or avoid offense. - Correct Answer - tact Two causes of accidents can best be described as?. - Correct Answer - unsafe acts / unsafe conditions Which of the following is an unsafe act that might be found with ladders? - Correct Answer - overreaching from a ladder
Which of the following is an unsafe act that might be found with ladders? - Correct Answer - carrying to heavy of a load up the ladder A ladder top should extend at least? above the roof edge of a building when used as access to the roof of a building. - Correct Answer - 36" It is OK to carry at least one tool in your hands when climbing a ladder. - Correct Answer - False
