EE MCQ
EE MCQ
Home
Quiz
Contact Us
Electrical Machines
A 2 KVA transformer has iron loss of 150 W and full load copper loss of 250 W. The maximum efficiency of the transformer would occur when the total loss is
400W
250 W
500 W
300 W
400W
250 W
500 W
300 W
Answer
Download EE MCQ app
Related Question
Electrical Machines
Which of the following is/are the advantages of carbon brush over the copper brush?
They are not hard as copper brush
In case of any sparking they will be less damaged than copper brushes
They are self lubricating in nature
All of these
They are not hard as copper brush
In case of any sparking they will be less damaged than copper brushes
They are self lubricating in nature
All of these
Answer
Download EE MCQ app
Electrical Machines
A 3 - Φ induction motor draws an current of 50 A from mains when starts by direct switching. If an auto transformer with 60 % tapping is used for starting the current drawn from the mains will be
80.
36.
18.
50.
80.
36.
18.
50.
Answer
Download EE MCQ app
Electrical Machines
Voltage regulation can be determined by which of the following?
MMf method.
ZPF method.
All of these
Synchronous impedance method.
MMf method.
ZPF method.
All of these
Synchronous impedance method.
Answer
Download EE MCQ app
Electrical Machines
In a synchronous generator, if mechanical input is increased with constant excitation, the load angle will
increase
decrease
None of these
either increase or decrease
increase
decrease
None of these
either increase or decrease
Answer
Download EE MCQ app
Electrical Machines
The 3 - Φ induction motors are, by a very considerable margin, the most widely used AC motors as
they have very good speed regulation.
these are cheaper in cost, simple and rugged in construction.
they are capable of operation under range of leading and lagging pf.
they have maximum efficiency and maximum starting torque.
they have very good speed regulation.
these are cheaper in cost, simple and rugged in construction.
they are capable of operation under range of leading and lagging pf.
they have maximum efficiency and maximum starting torque.
Answer
Download EE MCQ app
Search
Login here
Google
Download our application
Android
Apple
Follow Us
Facebook
Telegram
Instagram