ELECTRIC TRACTION

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

MCQ ON DISTRIBUTION AUTOMATION

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

A.C. TRANSMISSION AND DISTRIBUTION

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

D.C. TRANSMISSION AND DISTRIBUTION

Objective Questions Short notes Objective questions (Answers are given below) If in a d.c. 2-wire feeder, drop per feederconductor is 2%, transmission efficiency ofthe feeder is ……………………… percent.(a) 98 (b) 94(c) 96 (d) 99 Transmitted power remaining the same, ifsupply voltage of a dc 2-wire feeder isincreased by 100 percent, saving in copperis …………………….. percent.(a) … Read more

MCQ ON SPECIAL MACHINES

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