1. A circuit consists of a 3 F capacitor and a 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 in the circuit. A. True B. False 3. Full form of DTC. A. Direct torque …
1. Regenerative braking is not possible in a series motor. A. True B. False 2. Regenerative is the best electrical braking among all braking techniques. A. True B. False 3. Full form of SCIM. A. Squirrel cage induction motor B. Solid cage induction motor C. Square cage induction motor D. Squirrel cage inverter …
1. The advantage of the double squirrel cage induction motor over a single cage rotor is that it’s _______ A. Efficiency is higher B. Power factor is higher C. Slip is larger D. Starting current is lower 2. A 16-pole, 3-phase, 60 Hz induction motor is operating at a speed of 150 rpm. The …
Speed Control of Direct Current Motor MCQ 1. The advantage of the double squirrel cage induction motor over a single cage rotor is that it’s _______ A. Efficiency is higher B. Power factor is higher C. Slip is larger D. Starting current is lower 2. A 16-pole, 3-phase, 60 Hz induction motor is …
1. In the chopper circuit, commutation times are _______ A. Current commutation is equal to voltage commutation B. Current commutation is less as compared to that of voltage commutation C. Current commutation is more as compared to that of voltage commutation D. Both commutation techniques are not comparable 2. The generated e.m.f from 4-pole …
1. In the chopper circuit, commutation times are _______ A. Current commutation is equal to voltage commutation B. Current commutation is less as compared to that of voltage commutation C. Current commutation is more as compared to that of voltage commutation D. Both commutation techniques are not comparable 2. The generated e.m.f from 4-pole …
1. Calculate the value of the short circuit ratio if the per-unit value of synchronous reactance is 1.5 Ω. A. 0.66 B. 0.33 C. 0.17 D. 0.12 2. A higher value of armature reaction means a lower value of the short circuit ratio. A. True B. False 3. The unit of SCR is …
1. Calculate the minimum value of the active power in the cylindrical rotor synchronous machine? (Eb represents armature emf, Vt represents terminal voltage, δ represents rotor angle, X represents reactance) A. Eb×Vt×sinδ÷X B. 0 C. Eb2×Vt×sinδ÷X D. Eb×Vt÷X 2. Cylindrical pole machines are less stable than salient rotor machines. A. True B. False 3. The …
1. 40 V, 7 A, 70 rpm DC separately excited motor having a resistance of 0.3 ohms excited by an external dc voltage source of 4 V. Calculate the torque developed by the motor on half load. A. 18.10 N-m B. 4.24 N-m C. 40.45 N-m D. 52.64 N-m 2. Calculate the active power …
1. The stator voltage control method is a part of the slip changing technique. A. True B. False 2. Calculate the value of the new slip using the given data: V1=12 V, S1=.1, V2=5. A. 0.576 B. 0.247 C. 0.487 D. 0.987 3. Calculate the average value of the sinusoidal waveform y(t)=4.56cos(77.64πt+4800π÷68). A. …
