| 1. | The use of strain type insulators is made where the conductors are ? | |
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dead ended
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at intermediate anchor towers
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any of the above
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none of the above
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Report Question| 2. | A conductor, due to sag between two supports, takes the form of ? | |
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semi-circle
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triangle
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ellipse
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catenary
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| 3. | As compared to a 2-wire DC distributor, a 3-wire distributor with same maximum voltage to earth uses only ? | |
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31.26 percent of copper
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33.3 percent of copper
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66.7 percent of copper
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125 percent of copper
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| 4. | Transmission line insulators are made of ? | |
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glass
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porcelain
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iron
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P.V.C.
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| 5. | The operating voltage of high voltage cables is upto ? | |
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1.1 kV
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3.3 kV
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6:6 kV
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11 kV
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| 6. | Overhead system can be designed for operation upto ? | |
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11 kV
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33 kV
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66 kV
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400 kV
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| 7. | In a D.C. 3-wire distribution system, balancer fields are cross-connected in order to ? | |
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boost the generated voltage
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balance loads on both sides of the neutral
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make both machines run as unloaded motors
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equalize voltages on the positive and negative outers
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| 8. | For aluminium, as compared to copper, all the following factors have higher values except ? | |
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specific volume
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electrical conductivity
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co-efficient of linear expansion
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resistance per unit length for same cross-section
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| 9. | On which of the following factors skin effect depends ? | |
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Frequency of the current
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Size of the conductor
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Resistivity of the conductor material
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All of the above
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| 10. | When an alternator connected to the bus-bar is shut down the bus-bar voltage will ? | |
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fall
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rise
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remain unchanged
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none of the above
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