EE MCQ
EE MCQ
Home
Quiz
Contact Us
Electrical Machines
The heat generated in the transformer is dissipated mainly by
conduction.
convection.
radiation.
All of these
conduction.
convection.
radiation.
All of these
Answer
Download EE MCQ app
Related Question
Electrical Machines
Synchronous condensers are used to
reduce hunting
All of these
improve the power factor
improve starting torque
reduce hunting
All of these
improve the power factor
improve starting torque
Answer
Download EE MCQ app
Electrical Machines
A DC motor with armature resistance of 0.5 ohms is connected directly to a 230 Volt supply. If the armature is stationary then the current flowing through armature is
570 A.
250 A.
340 A.
460 A.
570 A.
250 A.
340 A.
460 A.
Answer
Download EE MCQ app
Electrical Machines
If starter is not used with large DC motor for starting, it will
provide execessive voltage drop in line.
damage the armature and commutator.
all of above.
draw a starting current many times its rated full load current.
provide execessive voltage drop in line.
damage the armature and commutator.
all of above.
draw a starting current many times its rated full load current.
Answer
Download EE MCQ app
Electrical Machines
A bipolar dc machine with interpoles has a main-pole flux of ф per pole and an interpole flux of Фᵢ per pole. The yoke of the machine is devide into four quadrants by the main-pole axis and The commutation axis. The flux-distribution in the quadrants will be
½ ( ф + фᵢ ) in two diametrically opposite quadrants and ½ ( ф - фᵢ ) in the remaining two Quadrants
½ ( ф + фᵢ ) in all the four quadrants
½ ( ф - фᵢ ) in all the four quadrants
½ ( ф + фᵢ ) in two adjacent quadrants and ½ ( ф - фᵢ ) in the remaining two quadrants
½ ( ф + фᵢ ) in two diametrically opposite quadrants and ½ ( ф - фᵢ ) in the remaining two Quadrants
½ ( ф + фᵢ ) in all the four quadrants
½ ( ф - фᵢ ) in all the four quadrants
½ ( ф + фᵢ ) in two adjacent quadrants and ½ ( ф - фᵢ ) in the remaining two quadrants
Answer
Download EE MCQ app
Electrical Machines
The result of slip test on a 3-phase, 20 KVA, 400 V, 50 Hz connected salient pole alternator is given below- Phase value: Vmax = 100 V, Vmin = 96 V, Imax = 10 A and I min = 7 A. The direct and quadranature axis reactances are respectively
14.28 and 9.60 Ω.
8.248 and 5.54 Ω.
14.28 and 5.54 Ω.
8.248 and 9.60 Ω.
14.28 and 9.60 Ω.
8.248 and 5.54 Ω.
14.28 and 5.54 Ω.
8.248 and 9.60 Ω.
Answer
Download EE MCQ app
Search
Login here
Google
Download our application
Android
Apple
Follow Us
Facebook
Telegram
Instagram