DC Motors Which one of the following is not necessarily the advantage of D.C. motors over A.C. motors? Stability High starting torque Low cost Wide speed range Stability High starting torque Low cost Wide speed range ANSWER DOWNLOAD EXAMIANS APP
DC Motors The commutating winding is basically used in a dc machine To reduce armature reaction None of the listed here To control the speed of machine To improve commutation To reduce armature reaction None of the listed here To control the speed of machine To improve commutation ANSWER DOWNLOAD EXAMIANS APP
DC Motors If the terminals of armature of D.C. motor are interchanged, this action will offer following kind of braking None of these Regenerative Dynamic braking Plugging None of these Regenerative Dynamic braking Plugging ANSWER DOWNLOAD EXAMIANS APP
DC Motors The speed of a motor falls from 1100 r.p.m. at no-load to 1050 r.p.m. at rated load. The speed regulation of the motor is 2.22% 6.77% 8.85% 4.76% 2.22% 6.77% 8.85% 4.76% ANSWER DOWNLOAD EXAMIANS APP
DC Motors In which of the following tests only one motor is required? Swinburne's test Brake test Field's test Hopkinson's test Swinburne's test Brake test Field's test Hopkinson's test ANSWER DOWNLOAD EXAMIANS APP
DC Motors For constant torque drive which speed control method is preferred? Mechanical loading system Field control Shunt armature control Armature voltage control Mechanical loading system Field control Shunt armature control Armature voltage control ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS