101 Basic Series - Module 20 - Post Assessment 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 Which of the following is a benefit(s) of using IGBTs in a PWM inverter? Refined Synthetic AC Sine Wave Less Audible Motor Noise Less Heat Generated Smaller Heat Sink Required All of the Above 2 High torque, large inertia, quick ramp-up applications are best for AF drives. True False 3 The frequency of the current is the number of cycles that pass a given point on a sine wave in one second. True False 4 The component of an adjustable frequency drive system that is used to command the motor to function as desired is called the ________. Operator interface Motor control section AC motor None of the above 5 Capacitors must never be used on an AF drive output. True False 6 A motor will run at a high temperature when operating on an AF drive than it will operating on line current. True False 7 The heat generated by a drive should be considered when choosing an enclosure. True False 8 Synchronous speed is calculated by the number of poles and the frequency of current supplied to it using the formula N = 120f/P. True False 9 What is the torque of a 10 HP motor at 1800 rpm? (T = 5252xHP/N) 8.75 foot/pounds 14.5 foot/pounds 21.8 foot/pounds 29.1 foot/pounds 10 Harmonics can cause equipment malfunctions, data distortion, nuisance tripping, and motor insulation failure. True False 11 The theorectical speed at which a motor is designed to run is synchronous speed. True False 12 The AF drive converts the utility power to adjustable frequency and ______________. Current Horsepower Voltage Resistance 13 The three standard analog signals that every AF drive manufacture offers are current, voltage, and pneumatic, and these are preferred over digital signals. True False 14 An insulated gate bipolar transistor (IGBT) can switch the current thousands of times faster per second and create a more refined synthetic AC sine wave. True False 15 To provide sufficient impedance for an AF drive, you can add a ________. Line capacitor Line rectifier Line inverter Line reactor 16 Displacement power factor is the term used for the ratio of the input KW to the input KVA, neglecting harmonics. True False 17 Power factor is the ratio of the power in to the power out of a device. True False 18 Control signals in an AF drive communicate information between components. True False 19 To increase impedance to the line to balance it between the minimum required and maximum limit you can add a _______. Line reactor Output filter Bypass Capacitor 20 The device in the AF drive that converts the incoming AC line current to DC is the _______. Rectifier Inverter Converter Diverter

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