NCCER Electrical Level 2 Module 2 Test Questions and Correct Answers

Any exposed live parts must be guarded if they are operating at 50V or more between terminals Which of the following are most likely to use dynamic braking? Forklifts In a DC series motor, how much of its full-load torque is developed at starting? 500% For a given number of poles, which of the following determines the speed of an AC motor? Frequency Which of the following motors is used where the required starting torque is high and speed control is desirable compound the synchronous speed at which a four-pole, 60Hz induction motor operates is 1,800 rpm slip is best described as . . . The difference between the synchronous speed and the speed of the rotor in an induction motor Which of the following motor operate on the principle of a rotating magnetic field? induction motors horsepower is used to rate the output capacity of a motor How many motor designs does NEMA designate 5 In a split-phase motor, how much greater is the starting current when compared to the full-load current? 6 to 8 times The capacitor-start motor is the single-phase motor type that has the highest starting torque The wound rotor induction motor is used for speed control and to limit starting current