NCC Practice Test 1 Questions And Answers Graded A+

Reactive power is always __ - Answer-90 degrees out of phase with true power Before awarding a journeyman certificate, a typical electrical apprenticeship program requires 8,000 total hours of __ - Answer-on-the-job training The formula for inductive reactance is __ - Answer-XL=2(pi)fL According to the power triangle, the apparent power is __ - Answer-greater than the true power If the time for one cycle is 0.1 second, the frequency is __ - Answer-10Hz The minimum ampacity for a feeder supplying ten 30A shore power receptacles in a marina is __ - Answer-120A A trainee must demonstrate knowledge of the hands-on tasks learned in each module. This is referred to as __ - Answer-a competency-based program Which of the following lighting loads would be used in a residence that is 1650 sq ft? - Answer-4950 VA Apprentices typically receive a pay increase after each __ - Answer-1,000 hours of related work What is the total load of a feeder serving 4 - 230V motors rated at 5hp, 15hp, 20hp, and 40hp? - Answer- 241.2 A What is the total load a feeder serving 4 - 2hp motors, 3 - 5hp motors, 1 - 15hp motor, and 1 - 25 hp motor? 208V - Answer-219.8 A An electrician who must know how to disassemble and reassemble magnetic motor starters is a(n) __ - Answer-electrical maintenance electricianTransformers in which the primary and secondary voltages are 180 degrees out of phase are known as __ - Answer-unlike-wound transformers What is the total resistance of three resistors in parallel with values of 2 ohms, 8 ohms, and 14 ohms? - Answer-1.44 ohms What is the motor full-load current for a motor with a nameplate rating of 50hp, 460V, 3 phase? - Answer-65A A noncontinuous load of two 120V outlets for heavy-duty lamp holders would have a load of __ - Answer-1200VA Calculate the load center length for a branch circuit consisting of the following noncontinuous loads: 125A at 80' 75A at 110' 50A at 100' - Answer-93' If a transformer has 200 turns in the primary, 100 turns in the secondary, and 150VAC applied to the primary, the voltage across the secondary is __ - Answer-75VAC OSHA Standards provided specifically for the construction industry are covered in __ - Answer-29 CFR 1926 An optional method for determining feeder to schools is covered in __ - Answer-NEC section 220.86 If the area of the plates of a capacitor is increased, the amount of capacitance _____. - Answer-increases The maximum size dual-element fuse for a 40hp, 3 phase, 460V motor with a design letter D is ___ - Answer-100AAccording the NEC, the total load of show windows must calculated at not less than ___ - Answer-200VA per linear foot of show window What is the feeder load (in VA) for three small appliance branch circuits? - Answer-4500VA If the phase angles of two sine waves are both 0 degrees, then the waves ___ - Answer-are in phase Opening the secondary circuit of a current transformer under load will cause a dangerous level of ___ - Answer-induced high voltage One type of nonsinusoidal waveform is the ___ - Answer-peak wave Electrical contractors typically employ ___ (this question is ****ing stupid) - Answer-E&I Technicians The opposing force that an inductor presents to the flow of alternating current is called ___ - Answerinductive reactance In a circuit that has both capacitance and resistance, the current will lead the voltage ___ - Answer-by some angle between 0 and 90 A device that uses electromagnetic induction to transfer electrical energy from one circuit to another is a ___ - Answer-transformer According to Kirchhoff's voltage law, the total voltage drop in a circuit is equal to the ___ - Answervoltage of a power source The interior lighting load for a school building with a 175,000 sq ft of floor space is ___ - Answer- 525,000VA Electricians who are responsible for their own taxes and providing their own insurance are considered ___ - Answer-individual contractorsAir conditioning overcurrent protective devices can never exceed what percentage of the motor-rated load current or the branch circuit selection current (whichever is greater)? - Answer-225% When space heating equipment uses electric resistance heating elements, protection for the resistance elements must not exceed ___ - Answer-60A