Electrical Machine Design Archives -

Which of the following is the major consideration to evolve a good design?

Which of the following is the major consideration to evolve a good design?A. Cost
B. Durability
C. Compliance with performance criteria as laid down in specifications
D. All of the above

Which of the following is the major consideration to evolve a good design? Read More »

The input impedance of a JFET is _____________that of an ordinary transistor?

Electrical Machine Design / admin

The input impedance of a JFET is _____________that of an ordinary transistor?

A. equal to
B. less than
C. more than
D. none of the above

The input impedance of a JFET is _____________that of an ordinary transistor? Read More »

Electrical Machine Design

The cold rolled grain oriented steel has _________ permeability in the direction of the grain orientation?

Electrical Machine Design / admin

The cold rolled grain oriented steel has _________ permeability in the direction of the grain orientation?

A. minimum
B. maximum
C. nil
D. none of the above

The cold rolled grain oriented steel has _________ permeability in the direction of the grain orientation? Read More »

Electrical Machine Design

Cylindrical windings using circular conductors, employed in transformers, are_____________?

Electrical Machine Design / admin

Cylindrical windings using circular conductors, employed in transformers, are_____________?

A. single layered
B. double layered
C. multi-layered
D. none of the above

Cylindrical windings using circular conductors, employed in transformers, are_____________? Read More »

Electrical Machine Design

Multi-layer helical windings are commonly used in the transformers as high voltage windings_______________?

Electrical Machine Design / admin

Multi-layer helical windings are commonly used in the transformers as high voltage windings_______________?

A. upto 20 kV
B. upto 50 kV
C. upto 80 kV
D. for 110 kV and above

Multi-layer helical windings are commonly used in the transformers as high voltage windings_______________? Read More »

Electrical Machine Design

The cold rolled grain oriented steel has ___________ permeability in the direction of the grain orientation?

Electrical Machine Design / admin

The cold rolled grain oriented steel has ___________ permeability in the direction of the grain orientation?

A. minimum
B. maximum
C. nil
D. none of the above

The cold rolled grain oriented steel has ___________ permeability in the direction of the grain orientation? Read More »

Electrical Machine Design

Helical windings are used in________________?

Electrical Machine Design / admin

Helical windings are used in________________?

A. distribution transformers
B. power transformers
C. shell type transformers
D. none of the above

Helical windings are used in________________? Read More »

Electrical Machine Design

Disc windings are primarily used in_____________-?

Electrical Machine Design / admin

Disc windings are primarily used in_____________-?

A. short capacity transformers
B. medium capacity transformers
C. high capacity transformers
D. any of the above

Disc windings are primarily used in_____________-? Read More »

Electrical Machine Design

The forced oil and air circulation method is usual one for transformers of capacities____________?

Electrical Machine Design / admin

The forced oil and air circulation method is usual one for transformers of capacities____________?

A. upto 5 MVA
B. upto 10 MVA
C. upto 20 MVA
D. 30 MVA upwards

The forced oil and air circulation method is usual one for transformers of capacities____________? Read More »

Electrical Machine Design

The heat dissipating capability of transformers of ratings higher than 30 kVA in increased by providing which of the following ?

Electrical Machine Design / admin

The heat dissipating capability of transformers of ratings higher than 30 kVA in increased by providing which of the following ?

A. Corrugations
B. Fins
C. Tubes
D. Radiator tanks
E. All of the above

The heat dissipating capability of transformers of ratings higher than 30 kVA in increased by providing which of the following ? Read More »

Electrical Machine Design