SYNCHRONOUS MOTOR :A synchronous motor is one in which the rotor normally rotates at the same speed as the revolving field in the machine. The stator is similar to that of an induction machine consisting of a cylindrical iron frame with windings, usually three-phase, located in slots around the inner periphery. Objective Questions Short notes Objective questions (Answers are given … Read more
MCQ ON SPECIAL MACHINES Objective Questions Short notes Objective questions (Answers are given below) A single-stack, 4-phase, 6-pole VR steppermotor will have a step angle of(a) 15º(b) 30º(c) 45º(d) 90º In a three-stack 12/8-pole VR motor, the rotorpole pitch is(a) 15º(b) 30º(c) 45º(d) 60º A three-stack VR stepper motor has a step angleof 10º. What … Read more
Objective Questions Short notes Objective questions (Answers are given below) With same maximum voltage between conductors,the ratio of copper volumes in 3-phase, 3-wire system and 1-phase, 2-wire system is(a) 4/3 (b) 3/4(c) 5/3 (d) 3/5 The volume of copper required for an a.c. transmissionline is inversely proportional to(a) current (b) voltage(c) power factor (d) both … Read more
DISTRIBUTION AUTOMATION MCQ Objective Questions Short notes Objective questions (Answers are given below) Need based energy management is better thandemand based energy management(a) true (b) false Round the clock power is required to(a) agricultural uses(b) shift based industries(c) commercial organisations(d) essential services Need based energy management would include(a) plan power generation as per forecast(b) monitor … Read more
Objective Questions Short notes Objective questions (Answers are given below) Diesel electric traction has comparatively limitedoverload capacity because(a) diesel electric locomotive is heavier than aplain electric locomotive(b) diesel engine has shorter life span(c) diesel engine is a constant-kW outputprime mover(d) regenerative braking cannot be employed. The most vital factor against electric tractionis the(a) necessity of … Read more