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

• 1. upto 5 MVA
• 2. upto 10 MVA
• 3. upto 20 MVA
• 4. 30 MVA upwards

Question: Disc windings are primarily used in_____________-?

• 1. short capacity transformers
• 2. medium capacity transformers
• 3. high capacity transformers
• 4. any of the above

Question: Helical windings are used in________________?

• 1. distribution transformers
• 2. power transformers
• 3. shell type transformers
• 4. none of the above

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

• 1. minimum
• 2. maximum
• 3. nil
• 4. none of the above

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

• 1. upto 20 kV
• 2. upto 50 kV
• 3. upto 80 kV
• 4. for 110 kV and above

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

• 1. single layered
• 2. double layered
• 3. multi-layered
• 4. none of the above

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

• 1. minimum
• 2. maximum
• 3. nil
• 4. none of the above

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

• 1. equal to
• 2. less than
• 3. more than
• 4. none of the above

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

• 1. Cost
• 2. Durability
• 3. Compliance with performance criteria as laid down in specifications
• 4. All of the above

Question: An ammeter has a resistance of G ohms and range of I amperes. The value of resistance required in parallel to convert it into an ammeter of range nI is______________?

• 1. nG
• 2. (n-1)G
• 3. G/(n-1)
• 4. G/n