MCQOPTIONS
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MCQOPTIONS
This section includes 517 Mcqs, each offering curated multiple-choice questions to sharpen your Electrical Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 501. |
Which of the following are the constants of the transmission lines? |
| A. | Resistance |
| B. | Inductance |
| C. | Capacitance |
| D. | All of the above |
| Answer» E. | |
| 502. |
Aluminium has a specific gravity of |
| A. | 1.5 |
| B. | 2.7 |
| C. | 4.2 |
| D. | 7.8 |
| Answer» C. 4.2 | |
| 503. |
Owing to skin effect |
| A. | Current flows through the half cross-section of the conductor |
| B. | Portion of the conductor near the surface carries more current and core of the conductor carries less current |
| C. | Portion of the conductor near the surface carries less current and core of the conductor carries more current |
| D. | Any of the above |
| Answer» C. Portion of the conductor near the surface carries less current and core of the conductor carries more current | |
| 504. |
Which of the following is not a constituent for making porcelain insulators? |
| A. | Quartz |
| B. | Kaolin |
| C. | Felspar |
| D. | Silica |
| Answer» E. | |
| 505. |
________ are the conductors, which connect the consumer's terminals to the distribution. |
| A. | Distributors |
| B. | Service mains |
| C. | Feeders |
| D. | None of the above |
| Answer» C. Feeders | |
| 506. |
The operating voltage of high voltage cables is up to |
| A. | l.lkV |
| B. | 3.3kV |
| C. | 6.6kV |
| D. | llkV |
| Answer» E. | |
| 507. |
The presence of ozone due to corona is harmful because it |
| A. | Reduces power factor |
| B. | Corrodes the material |
| C. | Gives odour |
| D. | Transfer energy to the ground |
| Answer» C. Gives odour | |
| 508. |
Which of the following is the demerit of a 'constant voltage transmission system' ? |
| A. | Increase of short-circuit current of the system |
| B. | Availability of steady voltage at all loads at the line terminals |
| C. | Possibility of better protection for the line due to possible use of higher terminal reactants |
| D. | Improvement of power factor at times of moderate and heavy loads |
| E. | Possibility of carrying increased power for a given conductor size in case of long-distance heavy power transmission |
| Answer» B. Availability of steady voltage at all loads at the line terminals | |
| 509. |
Skin effect is proportional to |
| A. | (conductor diameter) |
| B. | (conductor diameter) |
| C. | (conductor diameter) |
| D. | (conductor diameter) |
| E. | none of the above |
| Answer» D. (conductor diameter) | |
| 510. |
High voltage transmission lines use |
| A. | Suspension insulators |
| B. | Pin insulators |
| C. | Both (A) and (B) |
| D. | None of the above |
| Answer» B. Pin insulators | |
| 511. |
Transmission line insulators are made of |
| A. | glass |
| B. | porcelain |
| C. | iron |
| D. | P.V.C. |
| Answer» C. iron | |
| 512. |
In a D.C. 3-wire distributor using balancers and having unequal loads on the two sides |
| A. | both balancers run as generators |
| B. | both balancers run as motors |
| C. | balancer connected to lightly- loaded side runs as a motor |
| D. | balancer connected to heavily- loaded side runs as a motor |
| Answer» D. balancer connected to heavily- loaded side runs as a motor | |
| 513. |
A feeder, in a transmission system, feeds power to |
| A. | Distributors |
| B. | Generating stations |
| C. | Service mains |
| D. | All of the above |
| Answer» B. Generating stations | |
| 514. |
The effect of corona can be detected by |
| A. | Presence of ozone detected by odour |
| B. | Hissing sound |
| C. | Faint luminous glow of bluish color |
| D. | All of the above |
| Answer» E. | |
| 515. |
Which of the following characteristics should the line supports for transmission lines possess? |
| A. | Low cost |
| B. | High mechanical strength |
| C. | Longer life |
| D. | All of the above |
| Answer» E. | |
| 516. |
A booster is a |
| A. | Series wound generator |
| B. | Shunt wound generator |
| C. | Synchronous generator |
| D. | None of the above |
| Answer» B. Shunt wound generator | |
| 517. |
On which of the following factors skin effect depends? |
| A. | Frequency of the current |
| B. | Size of the conductor |
| C. | Resistivity of the conductor material |
| D. | All of the above |
| Answer» E. | |