When two DC series motors are connected in parallel, the resultant speed is more than normal speed. zero. normal speed. less than normal speed. TRUE ANSWER : ? YOUR ANSWER : ?
The no load and full load speed of DC mototr are 1400 rpm and 1200 rpm respectively. What is the percentage speed regulation of the motor? 18.25%. 15.30%. 14.28%. 16.67%. TRUE ANSWER : ? YOUR ANSWER : ?
Induction motors normally use cast aluminium rotor because aluminium is cheaper in cost. lighter in weight. of low resistivity. easy to cast owing to its low melting point and is easily available. TRUE ANSWER : ? YOUR ANSWER : ?
Which of the following represents the rotating losses of machine? All of the them Eddy current losses Hysteresis losses Friction and windage losses TRUE ANSWER : ? YOUR ANSWER : ?
In induction motor especially the cage rotors slots are nearly parallel to shaft axis. This is called crawling. slip. cogging. skewing. TRUE ANSWER : ? YOUR ANSWER : ?
What type of connection is made in between the inter-pole and the field winding? Series. Parallel. None of the options. Compound. TRUE ANSWER : ? YOUR ANSWER : ?
Find the developed torque DC Series Motor having armature resistance of 0.2 Ω and taking armature current of 60 A is connected to 250 V supply. Considered brush drop of 1 V each. 133.22 N-m 234.76 N-m. cant be determined. 266.20 N-m. TRUE ANSWER : ? YOUR ANSWER : ?
In an alternator, voltage drops occurs in armature resistance, leakage reactance, armature reaction and earth connection. armature resistance only. armature resistance, leakage reactance and armature reaction. armature resistance and leakage reactance. TRUE ANSWER : ? YOUR ANSWER : ?
In a DC series generator, the terminal voltage with increase in load will decrease remain nearly constant increase to rated voltage and then may decrease increase gradually and then stay at rated voltage TRUE ANSWER : ? YOUR ANSWER : ?