101 Basic Series - Module 16 - 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 The two ways of reversing the direction of a DC motor are to reverse the direction of the current through the armature and the coil. True False 2 Which of the following is NOT one of the three main application types? Constant torque / Variable horsepower Constant torque / Constant horsepower Variable torque / Variable horsepower Constant horsepower / Variable torque 3 In a practical DC motor, the armature is never in a neutral position, and torque is always at maximum. True False 4 A motor connection arrangement where each winding is wired end to end to form a completely closed loop circuit is a ____ connected. Delta Wye Wye-delta None of the above 5 In a three-phase motor, the three currents are start ____ degrees apart. 60 90 120 180 360 6 AC induction motors do not run at synchronous speed they run at base speed. True False 7 If you know the direction the current is flowing, and the orientation of the poles, you can determine which way the conductor will move through the magnetic field. True False 8 The speed at which the induction starter field rotates on an AC motor is called its ____. Base speed Full load speed Synchronous speed None of the above 9 A ____ is a DC motor that combines the characteristics of both the series and shunt motors. Compound motor Series motor Shunt motor Squirrel cage motor 10 The most common type of three-phase AC motor is the squirrel cage induction motor. True False 11 A motor made for connection to two voltages is called a ____. It enables the same motor to be used on different power line voltages. Dual voltage Squirrel cage Reduced voltage Compound 12 The number of field poles (or stationary windings) in a DC motor must be____. Even in number Odd in number Above two Less than 10 13 A ____ is a DC motor with the field coil wired in series with the armature coil. It is also called a universal motor and can be used in AC circuits as well. Compound motor Series motor Shunt motor Squirrel cage motor 14 Which of the following is NOT an advantage of the squirrel cage induction motor over a DC motor? Only the 2 bearings are points of mechanical wear There is no commutator, and no brushes to wear No sparks are generated to create a possible fire All are advantages 15 DC injection braking is an efficient method on most AC motors and provides a quick smooth braking action on all types of loads. True False 16 Horsepower is proportional to torque and speed. If the torque remains constant while speed decreases, then Horsepower ____. Increases Decreases Stays the same 17 The most commonly used AC NEMA Design motor is the ____ NEMA Design A NEMA Design B NEMA Design C NEMA Design D 18 What is the formula for torque? Torque = Radial distance X Force Torque = Radial distance / Force Torque = Force / Radial distance None of the above 19 The ____ is a device used in a DC motor to reverse the current in the armature every one-half rotation. Armature Commutator Stator Rotor None 20 In a simple DC motor, the armature is parallel to the magnetic field at 1/4 and ____ of a turn, producing no torque. 2/4 3/4 1/2 3/16

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