A. at one-fourth load
B. at one-half load
C. at or near full load
D. any of the above
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Related Mcqs:
- The usual values of maximum flux densities for distribution transformers using hot rolled silicon steel are______________?
- A. 0.5 to 0.8 Wb/m2 B. 0.8 to 1.0 Wb/m2 C. 1.1 to 1.35 Wb/m2 D. 1.4 to 1.8 Wb/m2...
- Power transformers have rating_______________?
- A. equal to 50 kVA B. equal to 100 kVA C. above 200 kVA D. none of the above...
- For large power transformers, self oil cooled type or air blast type which of the following values of current density may be used?
- A. 1.0 to 1.2 A/mm2 B. 1.5 to 2.0 A/mm2 C. 2.2 to 3.2 A/mm2 D. 3.2 to 4.2 A/mm2...
- A current density of __________ is ilsed for large power transformers with forced circulation of oil or with water cooling coils?
- A. 1.5 to 2.5 A/mm2 B. 3.5 to 4.5 A/mm2 C. 4.0 to 5.0 A/mm2 D. 5.4 to 6.2 A/mm2...
- Aluminium when adopted as a conductor material in __________ transformers, decreases the overall cost of the transformer?
- A. small size B. medium size C. large size D. any of the above size...
- In transformers using hot rolled steel, the cross-section of the yoke is made about __________ greater than that of the core?
- A. 5 percent B. 10 percent C. 15 percent D. 30 percent E. none of the above...
- 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 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...
- 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...
- Cylindrical windings using circular conductors, employed in transformers, are_____________?
- A. single layered B. double layered C. multi-layered D. none of the above...
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