Electric Drives Questions and Answers – Solid-State Devices – Thyristors

This set of Electric Drives Quiz focuses on “Solid-State Devices – Thyristors”. 1. The value of latching current is more than holding current. a) True b) False 2. SCR is a current controlled device. a) True b) False 3. Calculate the value of safety factor using the data: tc=12 msec, tq=6 msec. a) 4 b) … Read more

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Electric Drives Questions and Answers – Solid-State Devices – Transistors

This set of Electric Drives Multiple Choice Questions & Answers (MCQs) focuses on “Solid-State Devices – Transistors”. 1. The base of a transistor is lightly doped. a) True b) False 2. Who is larger in size? a) Base b) Collector c) Emitter d) P-N Junction 3. Calculate the collector current using the data: IE=14 mA, … Read more

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Electric Drives Questions and Answers – Solid State Controlled Drives – Switch-Reluctance Motor Drives

This set of Electric Drives Multiple Choice Questions & Answers (MCQs) focuses on “Solid State Controlled Drives – Switch-Reluctance Motor Drives”. 1. Reluctance motors are singly-excited. a) True b) False 2. Reluctance motor can operate on DC supply. a) True b) False 3. An infinite bus-bar has _____________ a) Constant voltage b) Constant frequency c) … Read more

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Electric Drives Questions and Answers – Solid State Controlled Drives – Brushless DC Motors

This set of Electric Drives Multiple Choice Questions & Answers (MCQs) focuses on “Solid State Controlled Drives – Brushless DC Motors”. 1. The Hall effect sensor is used as the rotor position sensor for the BLDC motor. a) True b) False 2. In BLDC motor armature windings are placed on the stator side. a) True … Read more

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Electric Drives Questions and Answers – Solid State Controlled Drives – AC Motor Systems

This set of Electric Drives Multiple Choice Questions & Answers (MCQs) focuses on “Solid State Controlled Drives – AC Motor Systems”. 1. Calculate the output frequency for the two-pulse converter if the supply frequency is 20 Hz. a) 40 Hz b) 20 Hz c) 60 Hz d) 90 Hz 2. Calculate the pulse number if … Read more

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Electric Drives Questions and Answers – Solid State Controlled Drives – DC Motor Systems

This set of Electric Drives Multiple Choice Questions & Answers (MCQs) focuses on “Solid State Controlled Drives – DC Motor Systems”. 1. RLE load is a voltage stiff load. a) True b) False 2. In Half-wave uncontrolled rectifier calculate the average value of the voltage if the supply is 23sin(50t). a) 7.32 V b) 8.32 … Read more

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Electric Drives Questions and Answers – Motors Rating and Heating – Environmental Factors

This set of Electric Drives Multiple Choice Questions & Answers (MCQs) focuses on “Motors Rating and Heating – Environmental Factors “. 1. Which test is used to determine the conditions where electric motors are being used? a) Thermography b) Geography c) Seismography d) Anthropology 2. What is the range of size of the motor (kW) … Read more

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Electric Drives Questions and Answers – Motors Rating and Heating – Load Equalisation

This set of Electric Drives Multiple Choice Questions & Answers (MCQs) focuses on “Motors Rating and Heating – Load Equalisation”. 1. Calculate the moment of inertia of the flywheel of mass 45 kg and radius of 2 m. a) 185 kg-m2 b) 180 kg-m2 c) 175 kg-m2 d) 170 kg-m2 2. Electric motor and control … Read more

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Electric Drives Questions and Answers – Motors Rating and Heating – Load Inertia Effect

This set of Electric Drives Multiple Choice Questions & Answers (MCQs) focuses on “Motors Rating and Heating – Load Inertia Effect”. 1. Hooke’s law is applicable within the elastic limit. a) True b) False 2. Calculate the load stress if the value of force is 20 N and the area of cross-section is 2 m2. … Read more

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Electric Drives Questions and Answers – Power Rating Determination of Electric Motors for Different Applications

This set of Electric Drives Interview Questions and Answers for Experienced people focuses on “Power Rating Determination of Electric Motors for Different Applications”. 1. Which one of the following motor is a 1-Φ AC motor? a) Synchronous motor b) Series motor c) Shunt motor d) Capacitor run 2. Current rating of the IM depends upon … Read more

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Manish Bhojasia - Founder & CTO at Sanfoundry
Manish Bhojasia, a technology veteran with 20+ years @ Cisco & Wipro, is Founder and CTO at Sanfoundry. He lives in Bangalore, and focuses on development of Linux Kernel, SAN Technologies, Advanced C, Data Structures & Alogrithms. Stay connected with him at LinkedIn.

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