NCCER Electrical Level 2 Exam Accurately Answered

NCCER Electrical Level 2 Exam Accurately Answered 50 volts - Any exposed live part of a motor operating at ______ or more must be guarded Forklifts - Dynamic braking is used in things such as ____________ 500% - A series-DC motor develops ________ of its full-load torque at starting High starting torque - Compound DC motors have a ____________________ 6 to 8 times - In a split phase motor, the starting current is _____________________ the full load current Conveyors - Constant torque load is seen in things such as __________________ Armature - To vary running speed in DC shunt motors, adjust the voltage applied to the ________________ Horsepower - The output capacity of a motor Direct proportion - In a constant torque motor, horsepower is in _______________ with speed High starting torque and power factor - Capacitor start/run motors have __________________ Weather protected - An example of an open motor type 1.15 - The most common service factor on a nameplate 1 hp - Several motor loads are permitted for one branch circuit if all motors are not over _______________ field poles - A magnetic field is produced by the ________________ Commutator - Provides switching action Brushes - What are field windings connected to Voltmeter - Used to find leads in a motor Even amount of poles (must have atleast 2) - A 3 phase induction motor must have ______________ 120 degrees - Polyphase AC is brought into a starter and connected to windings that are ___________ apart No load to Full load - A synchronous motor operates at synchronous speeds from ____________________ 15% - At no load conditions, the power factor can be as low as ________ Value in rpm on the nameplate - The rated full load speed is the _______________ within sight of the controller locations - A motor disconnect must be __________________ Stationary windings - Injection braking is when DC is applied to the _______________ of an AC mtor # of poles - The speed of a squirrel cage motor depends on the ________________ Constant speed applications - DC Shunt motors are used for __________________ Adjustable speed control - Wound rotor motors have hiigh starting torques and _____________________ Water cooled motors - An example of enclosed motors 3 sets of leads - Delta windings have _____________________