This set of Electric Drives Multiple Choice Questions & Answers (MCQs) focuses on “Motors Rating and Heating – Loading Conditions and Classes of Duty”. 1. Which duty cycle has on load and off-loads period? a) Intermittent duty b) Short time duty c) Continuous duty with constant load d) Continuous duty with variable load 2. Which … Read more
This set of Electric Drives Multiple Choice Questions & Answers (MCQs) focuses on “Motors – Heating Effects”. 1. Iron losses occur in the machine are variable losses. a) True b) False 2. Which of the following are the classes of insulating material in electrical machines? a) Γ, A, E, F, H, C b) Γ, E, … Read more
This set of Electric Drives Multiple Choice Questions & Answers (MCQs) focuses on “Induction Motors – Dynamic Braking(IM)”. 1. Order of the circuit is the number of memory elements present in the circuit. a) True b) False 2. In Induction motor rotor laminations are thicker than stator laminations. a) True b) False 3. Choose the … Read more
This set of Electric Drives Multiple Choice Questions & Answers (MCQs) focuses on “Induction Motors – Regenerative Braking (3-phase IM)”. 1. Power input to an induction motor is given by _________ a) 3VpIpcosΦ b) 2VpIpcosΦ c) VpIpcosΦ d) 5VpIpcosΦ 2. For motoring mode, the phase angle between the stator phase voltage and stator phase current … Read more
This set of Advanced Electric Drives Questions and Answers focuses on “Countercurrent Braking of DC Shunt Motors”. 1. Plugging is suitable for __________ type loads. a) Gravitational b) Electrostatic c) Weightless d) Leading 2. In DC shunt machine ∅ is directly proportional to Ia. a) True b) False 3. Braking resistance should be selected in … Read more
This set of Electric Drives Multiple Choice Questions & Answers (MCQs) focuses on “Dynamic Braking of DC Series Motors”. 1. Dynamic braking requires a strong _________ a) Magnetic field b) Electrostatic field c) Nuclear field d) Gravitational field 2. In DC series machine ∅ is directly proportional to Ia. a) True b) False 3. For … Read more
This set of Electric Drives Multiple Choice Questions & Answers (MCQs) focuses on “Dynamic Braking of DC Shunt Motors”. 1. The sine function is an odd function. a) True b) False 2. The cosine function is an even function. a) True b) False 3. Full form of NENO. a) Neither even nor odd b) Neither … Read more
This set of Basic Electric Drives Questions and Answers focuses on “Regenerative Braking of DC Series Motors”. 1. What is the condition for maximum power transfer theorem in DC circuits? a) RL=2Rth b) RL≠Rth c) RL≫Rth d) RL=Rth 2. Instantaneous power in the 3-φ system is constant. a) True b) False 3. The length of … Read more
This set of Electric Drives Multiple Choice Questions & Answers (MCQs) focuses on “Regenerative Braking of DC Shunt Motors”. 1. A circuit consists of 3 F capacitor and 5 H inductor. Determine the order of the circuit. a) 2 b) 1 c) 3 d) 0 2. The forced response is due to a source present … Read more
This set of Electric Drives Multiple Choice Questions & Answers (MCQs) focuses on “Electric Motors – Countercurrent Braking”. 1. The value of unit step function at t=5 sec is ________ a) 0 b) 1 c) -1 d) 2 2. The value of impulse at t=0 is __________ a) 0 b) 2 c) 1 d) infinite … Read more
