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Year 1 Final Exam JATC 2025/2026 STUDY
SET WITH VERIFIED SOLUTIONS
Which of the following items should be read first on every lesson? Introductory Information A competent electrician is one who has ___ , __ , and a positive ___ for his or her trade. skill / knowledge / attitude The nucleus of what was to become the IBEW was formed in? in the city of?. 1890 / St. Louis The? Act of 1935 is more commonly referred to as the Wagner Act. National Labor Relations Worker? on the job is a major reason that job tasks cannot be performed in a timely manner. Absenteeism ? and? are critically important to jobsite safety. a. 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. I., IV., and V. To find the area of a wire in circular mils, square the diameter expressed in?
mils What tightening torque should be used for a hexagonal head screw (not split-bolt) on a 250 kcmil conductor? 325 inch-pounds To reduce a fraction, divide the numerator and denominator by the?. 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. numerator The term? is used to identify the reference point or angle. theta The side next to the reference angle is called the? side. Adjacent 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. trigonometric tables The sine of θ is equal to the? divided by the?. opposite / hypotenuse The cos θ is equal to the? side divided by the?. adjacent / hypotenuse The tan θ is equal to the? side divided by the? side. opposite / adjacent What will happen if the time is not taken to properly measure and lay out a job before trying to bend conduit? 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 recommended way to mark a conduit for bending is to place a short pencil or marker marking where the bend will occur. False When fabricating a 90°-bend, the distance to the bending mark is equal to? The stub-up minus the take-up Calculate the distance to the reference mark for a 12 3/4-inch stub-up length and match it to the conduit size. 1/2 " → 7 3/4" 3/4" → 6 3/4" 1" → 4 3/4" 1 1/4" → N/A Choose the value that most closely equals the stub-up length needed for the 1/2- inch EMT in the photo. Keep in mind that if the measurement is being taken to the side of the box, instead of the inside of the 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. 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. 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? star What is the most common angle used when making offsets? 30° The measured rise method for bending an offset should be used when the angle of the bend cannot be predicted or measured accurately. True When making an offset, the bender must face in opposite directions for both bends. False Note: The bender must face in the same direction for both bends. Which benchmark on the bender is typically used when making offsets? the arrow Match the offset multiplier with the correct bend angle for the following angles. 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?. 45° Which of the following measurements must be known before a three-bend saddle can be fabricated? Distance to the center of the obstruction Obstruction rise
? is a keen sense of what to do or say in order to maintain good relations with others or avoid offense. tact Two causes of accidents can best be described as?. unsafe acts / unsafe conditions Which of the following is an unsafe act that might be found with ladders? overreaching from a ladder Which of the following is an unsafe act that might be found with ladders? 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. 36" It is OK to carry at least one tool in your hands when climbing a ladder. False 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 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. True ? are devices that interrupt the flow of electricity within as little as 1/40 of a second to prevent electrocution. Ground-fault circuit interrupters How often do electrocutions occur in the United States? 1 per week
Occupational Safety & Health Administration (OSHA) places the threshold voltage of electric shock at?. 50 V What is the limited approach boundary distance for an exposed fixed circuit part on a 480Y/277-volt distribution panel? 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. flash hazard analysis Which National Fire Protection Association (NFPA) document covers safe working practices for electrical work? 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." 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. Class A What are two recognized means of preventing injury during electrical equipment operations? Grounding Insulation The metal housing of a drill-motor is a(n)? (conductor/insulator). conductor Double insulation on a drill will guarantee protection and safe usage of the drill. 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?.
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. multiply / divide Match the following powers of 10 to the correct units. 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?. ten The prefix deci means?. tenth What effect will metrication have on America's global competitiveness? 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? multiply by 5 Solve the following for X. 45X = 120/ (45X)/45 = 120/(2x45) X = 120/ X = 1. What National Electrical Code (NEC) chapter covers the requirements for firestopping? 3 A cable assembly that enters a fire resistive wall and exits the opposite side of the wall is considered to be a? penetration.
through What is the most important consideration when planning a large wire pull? The proper personal protective equipment (PPE) and safety requirements for the job. In underground conduit applications, the cable should? be listed for wet locations Which statements are true in terms of aluminum conductors? 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". 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. 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. joint components
