MCQOPTIONS
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MCQOPTIONS
This section includes 9 Mcqs, each offering curated multiple-choice questions to sharpen your Power Systems knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
GRADING_OF_THE_CABLES_IS_PERFORMED_IN_ORDER_TO_ACHIEVE_____________?$ |
| A. | uniform stress |
| B. | reduction in quantity of insulation |
| C. | reduction in quality of insulation |
| D. | (i), (ii) |
| Answer» B. reduction in quantity of insulation | |
| 2. |
Consider a system having a cable of capacitance 5 nF, with 765 kV star connected at 50 Hz having a power loss in the cable as 82.1 kW. Then the dielectric loss angle is _________(in degrees).$ |
| A. | 15 |
| B. | 7.5 |
| C. | 20 |
| D. | 4.9 |
| Answer» B. 7.5 | |
| 3. |
The_resistance_of_the_insulation_used_for_the_cables_is_40_ohms_for_a_length_of_‘x’_km._If_the_proposed_plan_needs_to_extend_the_transmission_line_cable_to_extra_‘2x’_m_then_the_resistance_of_the_cable_offered_will_be_______________(in_ohms).$# |
| A. | 13.33 |
| B. | 20 |
| C. | 120 |
| D. | 40 |
| Answer» B. 20 | |
| 4. |
Dielectric_power_loss_of_a_transmission_line_cable_operating_for_‘V’_volts,_‘f’_Hz_having_a_capacitance_of_‘C’_Farads_with_the_tangent_loss_angle_of_δis_____________$ |
| A. | ωCV<sup>2</sup> tanδ |
| B. | ωCV<sup>2</sup>/tanδ |
| C. | (tanδ/ωCV)<sup>2</sup> |
| D. | ωCV<sup>2</sup> tanδ<sup>2</sup> |
| Answer» B. ‚âà√¨‚àö¬¢CV<sup>2</sup>/tan‚âà√≠¬¨‚Ä¢ | |
| 5. |
The condition at which the minimized dielectric stress condition (R/r) will take place is _____________? |
| A. | 2.7188 |
| B. | 0.7188 |
| C. | 1/2.7188 |
| D. | 2.7188<sup>2</sup> |
| Answer» B. 0.7188 | |
| 6. |
The ratio of dielectric stress of the on the cable corresponding to the maximum and minimum is ____________ |
| A. | R/r |
| B. | r/R |
| C. | rR |
| D. | (R/r)<sup>2</sup> |
| Answer» B. r/R | |
| 7. |
For a transmission system of voltage ‘765 kV’ volts having the core radius of ‘5’ cm and outer radius of ‘0.40’ m. The maximum dielectric stress on single core cable is _________$ |
| A. | 7357.7 kV |
| B. | 919.7 kV |
| C. | 4247 kV |
| D. | 530 kV |
| Answer» B. 919.7 kV | |
| 8. |
Single core cables for ac systems are provided with armouring. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 9. |
Single core cables for AC systems are not provided with armouring. |
| A. | True |
| B. | False |
| Answer» B. False | |