1. Which of the following is not true in the case of a radial distribution system
- The cost of a radial system is lower.
- The protection of a radial system is easier.
- The reliability of a radial system is higher.
- The planning and design of a radial system is simple.
2. The ratio of maximum non-coincident demand and maximum diversified demand is known as
- diversity factor
- load factor
- demand factor
- utilization factor
3. The ratio of average demand and maximum demand is known as
- diversity factor
- load factor
- demand factor
- utilization factor
4. The daily energy consumption data of four consumers is given in the following table. All the four consumers are connected to transformer T1. If the maximum diversified demand is 20 kW the diversity factor is
- 0.76
- 1.32
- 0.66
- 1.48
5. The following bus bar arrangement is known as
- Main and transfer Bus
- Double bus Single Breaker
- Double bus Double Breaker
- Breaker and a half scheme
6. The distribution system configuration shown in the following figure is
- Spot network
- Grid network
- Primary selective
- Secondary selective
7. Which of the following bus layout has lowest cost?
- Double-bus and double breaker
- Double-bus and single breaker
- Breaker and half scheme
- Single-bus single breaker
8. A load survey was conducted by utility to get the relationship between energy consumption and maximum demand. The 15-minute maximum demand is given by.
Maximum kW demand = 0.3 + 0.012 kWh
The following five consumers are connected to the transformer. If the maximum diversified demand of the consumer at the transformer is 54.30, the diversity factor is.
- 1.5
- 2.0
- 2.5
- 3.5
9. Two transformers T1 and T2 are connected to the feeder as shown in the following figure. The maximum diversified demands on T1 and T2 are 60 kW and 40 kW respectively.
For the load allocation based on surveys, the diversity factors corresponding various number of consumers is given in the following table.
The total diversified maximum demand on the feeder section from N1 to N2 is
- 100.0 kW
- 96.0 kW
- 88.0 kW
- 80.0 kW
10. Consider a distribution system with four distribution transformer as shown in the following figure. If the metered demand at the substation is 600 kVA, the allocation factor is
- 1.00
- 0.80
- 0.75
- 0.60
11. Which of the following sentences is true in the case of ring bus configuration ?
I. The switching operations are carried out through breaker.
II. The reliability and operational flexibility is higher.
III. Relaying is relatively simple.
- I and II
- I and III
- II and III
- I , II, and III