Electrical Machines A simple method of increasing the voltage of a DC generator is to increase the source frequency. increase the speed of shaft rotation. increase the number of turns in field coil. increase the number of turns in armature coil. increase the source frequency. increase the speed of shaft rotation. increase the number of turns in field coil. increase the number of turns in armature coil. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The inertia constant H of a synchronous condenser is equal to that of the effective length of the line. greater than that of hydro generator. none of these. greater than that of turbo alternator. equal to that of the effective length of the line. greater than that of hydro generator. none of these. greater than that of turbo alternator. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines At what power factor, the voltage regulation of a transformer can be zero ? Zero power factor. Leading power factor. Unity power factor. Lagging power factor. Zero power factor. Leading power factor. Unity power factor. Lagging power factor. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines What does the use the of height flux density value in transformer design lead to? Reduced iron loss. Reduced copper loss. Decrease in weight/KVA. Increase in weight/KVA. Reduced iron loss. Reduced copper loss. Decrease in weight/KVA. Increase in weight/KVA. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 3 stack stepper motor has 12 teeth on stator as well as on rotor. Determine the step size when each stack excited? 10°. 30°. 24°. 45°. 10°. 30°. 24°. 45°. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Two synchronous generators operating in parallel 200 MW and 400 MW respectively. The drooping characteristics of their governors are 4% and 5% from no load to full load. Consider the governors operating at 50Hz on no load. How will the machine share, if the load is 600 MW? 200 MW and 400MW None of these generator 2 gets over load generator 1 gets over load 200 MW and 400MW None of these generator 2 gets over load generator 1 gets over load ANSWER DOWNLOAD EXAMIANS APP
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