NCC Practice Test 1 WITH COMPLETE SOLUTION

NCC Practice Test 1 WITH COMPLETE SOLUTION 1. Reactive power is always : 90 degrees out of phase with true power 2. Before awarding a journeyman certificate, a typical electrical apprentice- ship program requires 8,000 total hours of : on-the-job training 3. The formula for inductive reactance is : XL=2(pi)fL 4. According to the power triangle, the apparent power is : greater than the true power 5. If the time for one cycle is 0.1 second, the frequency is : 10Hz 6. The minimum ampacity for a feeder supplying ten 30A shore power recep- tacles in a marina is : 120A 7. A trainee must demonstrate knowledge of the hands-on tasks learned in each module. This is referred to as : a competency-based program 8. Which of the following lighting loads would be used in a residence that is 1650 sq ft?: 4950 VA 9. Apprentices typically receive a pay increase after each : 1,000 hours of related work 10. What is the total load of a feeder serving 4 - 230V motors rated at 5hp, 15hp, 20hp, and 40hp?: 241.2 A 11. What is the total load a feeder serving 4 - 2hp motors, 3 - 5hp motors, 1 - 15hp motor, and 1 - 25 hp motor? 208V: 219.8 A 12. An electrician who must know how to disassemble and reassemble mag- netic motor starters is a(n) : electrical maintenance electrician 13. Transformers in which the primary and secondary voltages are 180 de- grees out of phase are known as : unlike-wound transformers 14. What is the total resistance of three resistors in parallel with values of 2 ohms, 8 ohms, and 14 ohms?: 1.44 ohms 15. What is the motor full-load current for a motor with a nameplate rating of 50hp, 460V, 3 phase?: 65A 16. A noncontinuous load of two 120V outlets for heavy-duty lamp holders would have a load of : 1200VA 17. Calculate the load center length for a branch circuit consisting of the following noncontinuous loads: 125A at 80' 75A at 110' 50A at 100': 93'