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. 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 …
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 …
1. Calculate the frequency of the waveform x(t)=45sin(40πt+5π). A. 24 Hz B. 27 Hz C. 23 Hz D. 20 Hz 2. The generated e.m.f from 16-pole armature having 57 turns driven at 78 rev/sec having flux per pole as 5 mWb, with lap winding is ___________ A. 44.16 V B. 44.15 V C. 44.46 …
1. Calculate the frequency of the waveform x(t)=45sin(40πt+5π). A. 24 Hz B. 27 Hz C. 23 Hz D. 20 Hz 2. The generated e.m.f from 16-pole armature having 57 turns driven at 78 rev/sec having flux per pole as 5 mWb, with lap winding is ___________ A. 44.16 V B. 44.15 V C. 44.46 …
1. Calculate the time period of the waveform y(t)=74cos(81πt+π). A. .024 sec B. .027 sec C. .023 sec D. .025 sec 2. The generated e.m.f from 42-pole armature having 74 turns driven at 64 rev/sec having flux per pole as 21 mWb, with wave winding is ___________ A. 4177.171 V B. 4177.152 V C. …
1. Calculate the time period of the waveform y(t)=74cos(81πt+π). A. .024 sec B. .027 sec C. .023 sec D. .025 sec 2. The generated e.m.f from 42-pole armature having 74 turns driven at 64 rev/sec having flux per pole as 21 mWb, with wave winding is ___________ A. 4177.171 V B. 4177.152 V C. …
1. In DC chopper, the waveform for input and output voltages is respectively __________ A. Discontinuous and Continuous B. Continuous and Discontinuous C. Both continuous D. Both discontinuous 2. A chopper behaves as a __________ A. DC equivalent of AC switching device B. DC equivalent of AC transformer C. DC equivalent of AC relay …
1. Turn-on and turn-off times of transistor depend on _________ A. Static Characteristic B. Junction Capacitance C. Current Gain D. Voltage Gain 2. The generated e.m.f from 45-pole armature having 400 turns driven at 70 rev/sec having flux per pole as 90 mWb, with 17 parallel paths is ___________ A. 13341.17 V B. 12370.14 …
1. Turn-on and turn-off times of transistor depend on _________ A. Static Characteristic B. Junction Capacitance C. Current Gain D. Voltage Gain 2. The generated e.m.f from 45-pole armature having 400 turns driven at 70 rev/sec having flux per pole as 90 mWb, with 17 parallel paths is ___________ A. 13341.17 V B. 12370.14 …
