JATC Exam Questions and Answers||A+ Solution guide(Verified)

JATC Exam Questions and Answers||A+ Solution guide(Verified) A competent electrician is one who has ___ , __ , and a positive ___ for his or her trade. - Answer- skill / knowledge / attitude The nucleus of what was to become the IBEW was formed in ? in the city of ? . - Answer- 1890 / St. Louis The ? Act of 1935 is more commonly referred to as the Wagner Act. - Answer- National Labor Relations Worker ? on the job is a major reason that job tasks cannot be performed in a timely manner. - Answer- Absenteeism ? and ? are critically important to jobsite safety. a. - Answer- Awareness / common sense Which of the following items should be read first on every lesson? - Answer- Introductory Information 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. - Answer- I., IV., and V. To find the area of a wire in circular mils, square the diameter expressed in ? - Answer- mils What tightening torque should be used for a hexagonal head screw (not split-bolt) on a 250 kcmil conductor? - Answer- 325 inch-pounds To reduce a fraction, divide the numerator and denominator by the ? . - 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. - Answer- numerator The term ? is used to identify the reference point or angle. - Answer- theta The side next to the reference angle is called the ? side. - Answer- 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. - Answer- trigonometric tables The sine of θ is equal to the ? divided by the ? . - Answer- opposite / hypotenuse The cos θ is equal to the ? side divided by the ? . - Answer- adjacent / hypotenuse The tan θ is equal to the ? side divided by the ? side. - 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? - 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. - Answer- True What tool can be used to prevent an off-axis between bends in an offset (dog-legs)? - Answer- No-dog level A lightweight metallic raceway without threads is called ? in the National Electrical Code. - Answer- Electrical Metallic Tubing PVC is a form of what type of conduit? - Answer- rigid non-metallic conduit Match the conduit/size with the appropriate protective cap. - 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. - 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? - 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. - Answer- True Note: There are too many variables to rely solely upon the position of the bender handle to determine the angle of bend. Each bender should be checked initially to verify the accuracy of the bender markings and the take-up value. The recommended way to mark a conduit for bending is to place a short pencil or marker marking where the bend will occur. - Answer- False When fabricating a 90°-bend, the distance to the bending mark is equal to? - Answer- 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. - Answer- 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. - 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. - 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? - Answer- star What is the most common angle used when making offsets? - 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. - Answer- True When making an offset, the bender must face in opposite directions for both bends. - Answer- False