EE MCQ
EE MCQ
Home
Quiz
Contact Us
Electrical Machines
It is advisable to start a DC series motor with some load to
Limit the speed.
Limit the current.
Avoid sparking.
Limit the flux.
Limit the speed.
Limit the current.
Avoid sparking.
Limit the flux.
Answer
Download EE MCQ app
Related Question
Electrical Machines
The full load copper loss and iron loss of transformer are 6400W and 5000W respectively. The copper loss and iron loss at half load will be respectively?
3200 W and 2500 W
1600 W and 5000 W
3200 W and 5200 W
1600 W and 1250 W
3200 W and 2500 W
1600 W and 5000 W
3200 W and 5200 W
1600 W and 1250 W
Answer
Download EE MCQ app
Electrical Machines
Eb/Vt ratio of a DC motor is an indication of
speed regulation.
running torque.
efficiency.
starting torque.
speed regulation.
running torque.
efficiency.
starting torque.
Answer
Download EE MCQ app
Electrical Machines
A DC shunt machine generates 250 V on open circuit at 1000 RPM. Armature resistance is 0.5 Ω, field resistance 250 Ω. When running as a motor takes 4 A at 250 V. Calculate the efficiency when running as a motor taking 40 A at 250 V. Armature reaction weakens the field by 4%.
82.5%
72.5%
78.5%
67.5%
82.5%
72.5%
78.5%
67.5%
Answer
Download EE MCQ app
Electrical Machines
Number of tappings for each equalizer ring is equal to
number of pole pairs.
number of commutator segments.
number of parallel paths.
number of poles.
number of pole pairs.
number of commutator segments.
number of parallel paths.
number of poles.
Answer
Download EE MCQ app
Electrical Machines
The use of higher flux density in the transformer design
increases the weigh per KVA
has no relation with the weight of transformer
reduces the weigh per KVA
None of these
increases the weigh per KVA
has no relation with the weight of transformer
reduces the weigh per KVA
None of these
Answer
Download EE MCQ app
Search
Login here
Google
Download our application
Android
Apple
Follow Us
Facebook
Telegram
Instagram