In a Schering bridge the potential of the detector above earth potential is
Select an option to see the answer and solution.
Electrical Engineering · all questionsElectrical Machine Design
Electrical Machine Design
practice.
Practice every MCQ with options. Use Show answers when you want the correct option and solution.
201
Questions
4/11
Page
Pick an option on a question to see the right answer and solution.
Induction type single phase energy meters measure electric energy in
Select an option to see the answer and solution.
To measure radio frequency, the suitable frequency meter is
Select an option to see the answer and solution.
The cold rolled grain oriented steel has ______ permeability in the direction of the grain orientation.
Select an option to see the answer and solution.
Power transformers should be designed to have maximum efficiency
Select an option to see the answer and solution.
are used for construction of core of electromagnets.
Select an option to see the answer and solution.
For measurements on high voltage capacitors, the suitable bridge is
Select an option to see the answer and solution.
A moving-coil permanent-magnet instrument can be used as flux meter
Select an option to see the answer and solution.
In ______ machines, the size of the shaft is decided by the critical speed which depends on the deflection of the shaft.
Select an option to see the answer and solution.
is usually used for brush rockers
Select an option to see the answer and solution.
Commercial available medium size machines have a speed range of ______ .
Select an option to see the answer and solution.
The usual values of maximum flux densities for distribution transformers using hot rolled silicon steel are
Select an option to see the answer and solution.
The electrical power to a meggar is provided by
Select an option to see the answer and solution.
In D.C. machines, ir order to prevent excessive distortion of field form by the armature reaction, the field mmf must be made
Select an option to see the answer and solution.
Various adjustments in an energy meter include
Select an option to see the answer and solution.
For large power transformers, self oil cooled type or air blast type which of the following values of current density may be used?
Select an option to see the answer and solution.
The rectifier instrument is not free from
Select an option to see the answer and solution.
Instrument transformers are
Select an option to see the answer and solution.
In order to achieve high accuracy, the slide wire of a potentiometer should be
Select an option to see the answer and solution.
In D.C. machines the number of slots per pole usually lies
Select an option to see the answer and solution.