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YEAR 1 FINAL EXAM JATC 2026
QUESTIONS AND ANSWER KEY
(VERIFIED).
Double insulation on a drill will guarantee protection and safe usage of the drill. - correct answer - False Note: Double insulation does not provide protection against defective cords and plugs or against heavy moisture conditions. o get a tool or piece of material up to the scaffold from the ground, you should?. - correct answer - use a hand line and bucket or other receptacle Rolling scaffolds require? and toeboards to be safe. - correct answer - guardrails Before getting down from a scaffold, you should always check to be sure that materials or tools?. - correct answer - are not left in a position from which they might fall if the scaffold is moved
The? of a conductor is defined as the diameter of the conductor in mils, squared. - correct answer - circular-mil area 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
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 What effect will metrication have on America's global competitiveness? - correct answer - Metrication will have a negative effect. If a person multiplies one side of an equation by five, what must he or she do to the other side of the equation? - correct answer - multiply by 5
Solve the following for X. 45X = 120/2 - correct answer - (45X)/45 = 120/(2x45) X = 120/ X = 1. What National Electrical Code (NEC) chapter covers the requirements for firestopping? - correct answer - 3 A cable assembly that enters a fire resistive wall and exits the opposite side of the wall is considered to be a? penetration. - correct answer - through What is the most important consideration when planning a large wire pull? - correct answer - The proper personal protective equipment (PPE) and safety requirements for the job. In underground conduit applications, the cable should? - correct answer - be listed for wet locations
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. IV. Work safe. V. Work smart. - correct answer - I., IV., and V. To find the area of a wire in circular mils, square the diameter expressed in? - correct answer - mils What tightening torque should be used for a hexagonal head screw (not split-bolt) on a 250 kcmil conductor? - correct answer - 325 inch-pounds To reduce a fraction, divide the numerator and denominator by the?. - correct answer - same number When multiplying two fractions, multiply the numerator of one fraction by the? of the second fraction. This product is placed over the product of the two denominators. - correct answer - numerator
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 A "plumb 30" or a "plumb 45" bender will reliably produce an approximate 30°- or 45°-bend when the conduit is horizontal and the handle is pulled up so that the handle is vertical or plumb. - correct answer - True Note: There are too many variables to rely solely upon the position of the bender handle to determine the angle of bend.
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°
systems. The conductor's rating is dependent upon its type of?. - correct answer - Heat / electrical insulation Conductors are assigned a? ampacity that reflects the insulation's ability to handle and dissipate heat under? conditions. - correct answer - specific / varying The specific insulation types listed for use in wet locations contain the letter? in the type designator. - correct answer - W The common factors that can contribute to conductor insulation degradation because of excessive operating temperature are the ? temperature in which the conductor insulation shall operate, the ? heat created in the conductor as a result of current flow, the dissipation rate of the heat into the surrounding 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
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
? 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 What are two recognized means of preventing injury during electrical equipment operations? - correct answer - Grounding Insulation The metal housing of a drill-motor is a(n)? (conductor/insulator). - correct answer - conductor
