101 Basic Series - Module 21 - CEU Education Your final score on this exam will be emailed to you for your records. First name:   Last name:   Company name:   E-Mail Address   City   State   NO STATEALAKASAZARCACOCTDEDCFMFLGAGUHIIDILINIAKSKYLAMEMHMDMAMIMNMSMOMTNENVNHNJNMNYNCNDMPOHOKORPAPRPWRISCSDTNTXUTVTVIVAWAWVWIWY Province (Optional)   Country (Optional)   1 There are three main ways to start a motor: With across-the-line starters, adjustable frequency drives, and reduced voltage starters. True False 2 By reducing voltage to the motor, torque is _________. Increased Decreasing Stays the same 3 The starter type that requires a special motor (regardless of voltage system) is _________. Primary resistor Autotransformer Part winding Wye-delta Solid state 4 The current inrush from starting large motors can cause flickering lights or brownouts. True False 5 One reason for using reduced voltage starting is to avoid overload the distribution system. True False 6 When maximum starting torque per line amp is required, an autotransformer reduced voltage starter should be used. True False 7 Best starter type for high inertia load is _____. Primary resistor Autotransfomer Part winding Wye-delta Solid state 8 In a primary resistor reduced voltage starter, the resistors resist the current flow, resulting in the voltage ____________. Decreasing Increasing Staying the same 9 One reason for using reduced voltage starting is to avoid stress on equipment or product lines. True False 10 The winding of the motor are operated in series during part winding reduced voltage starting. True False 11 A typical NEMA design B motor can draw _____ times its full load operating current at start-up. 1-2 6-8 10-12 12 With a wye-delta starter, while switching from wye to delta, the motor must disconnect and reconnect. True False 13 The least expensive starter type is ________. Autotransformer Part winding Wye-delta Primary resistor Solid state 14 Due to decreased voltage, torque is also reduced, which provides a soft, easy start for the motor and its load. True False 15 During acceleration, the SCR is responsible for controlling motor voltage, current and torque. True False 16 __________ uses an extra contactor and a set of resistors to keep the motor on-line during the switch from wye to delta. Wye transition Delta transition Open transition Closed transition 17 The starter type that has three starting torques available through taps is _____. Primary resistor Autotransformer Part winding Wye-delta Solid state 18 A typical NEMA design B motor generates about _____ of its normal full load torque during start-up. 50% 100% 150% 200% 19 The transformer of an autotransformer starter ____ the current in order to reduce the voltage. Steps up Steps down Matches the line current 20 When connected in the delta configuration for starting, the winding are receiving reduced voltage. True False

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