DC Motors D.C. series motors are used Where load changes frequently Where constant operating speed is needed None of these Where load is constant Where load changes frequently Where constant operating speed is needed None of these Where load is constant ANSWER DOWNLOAD EXAMIANS APP
DC Motors Which of the following motor has the poorest speed regulation? Shunt motor Cummulative compound motor Series motor Differentially compound motor Shunt motor Cummulative compound motor Series motor Differentially compound motor ANSWER DOWNLOAD EXAMIANS APP
DC Motors D.C. generators are normally designed for maximum efficiency around Rated voltage All of these Rated r.p.m. Full load Rated voltage All of these Rated r.p.m. Full load ANSWER DOWNLOAD EXAMIANS APP
DC Motors A series motor will over speed when Load is removed The armature circuit is opened. The field is opened The load is increase Load is removed The armature circuit is opened. The field is opened The load is increase 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 6.77% 2.22% 4.76% 8.85% 6.77% 2.22% 4.76% 8.85% ANSWER DOWNLOAD EXAMIANS APP
DC Motors Which one of the following is not necessarily the advantage of D.C. motors over A.C. motors? Stability Low cost High starting torque Wide speed range Stability Low cost High starting torque Wide speed range ANSWER DOWNLOAD EXAMIANS APP
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