1. Software based projects are useful in _______________ and ________ before their uses.
a. Designing control system and Components
b. Designing electrical system and switchgear
c. Designing control system and panel
d. Designing electrical system and components
2. ________________ is an electrical network modeling and simulation software tool used by power systems engineers to create an "electrical digital twin" and analyze electrical power system dynamics, transients and protection.
a. Q Blade
b. Lab View
c. E-Tap(Electrical Transient Analyzer Program)
d. Auto CAD
3. Diagram called, after omitting all resistances, static loads, capacitance of the transmission lines and magnetising circuit of the transformer? ___________
a. Single line diagram
b. Resistance diagram
c. Reactance diagram
d. Impedance diagram
4. Transformer is a device which transfers power from one voltage level to another without change of ________________.
a. Current
b. Frequency
c. Voltage
d. Frequency and Current
5. __________is defined as a conductor or a group of conductor used for collecting electric power from the incoming feeders and distributes them to the outgoing feeders.
a. Tower
b. sub-Station
c. Bus-bar
d. Receiving station
6. Which among these is the least expensive protection for over current in low voltage system?
a. Rewireable fuse.
b. Isolator.
c. Circuit breaker.
d. Air breaker switch.
7. Energy meter measures energy in ________.
a. Joules
b. kW
c. kWh
d. W
8. An electronic energy meter makes use of ___________
a. IC
b. Transformer
c. CRO
d. Multimeter
9. Measurement of energy involves _________
a. Inductance and capacitance measurement
b. Power consumption and time duration
c. Resistance measurement and voltage drop
d. Current consumption and voltage drop
10. Single line diagram does not represents_________.
a. Star connection of transformer winding
b. Delta connection of transformer winding
c. Neutral wire of transmission lines
d. Ratings of machines
11. The isolators used in the transmission lines are capable of breaking________
a. Fault current
b. No current
c. Charging current
d. Load current
12. Why are the isolators used?___________
a. Break abnormal current
b. Making under fault conditions
c. Breaking the circuit under no load condition
d. None of the above
13. Isolator in sub station is open under___________condition?
a. No load
b. Short circuit
c. Full load
d. Any of the above
14. A single line diagram is a simplified notation for representing a ______ power system.
a. Single phase
b. Two phase
c. Three phase
d. Six phase
15. The normal connected load of a domestic consumer is usually__________
a. up to 10 kW
b. 10 to 20 kW
c. 25 to 50 kW
d. 50 to 100 kW.
16. Demand factor is the_____________
a. Maximum Demand / Average Demand
b. Maximum Demand / Connected Load
c. Average Demand / Maximum Demand
d. Connected Load / Maximum Demand.
17. In a system if the base load is the same as the maximum demand, the load factor will be____
a. 1
b. Zero
c. Infinity
d. 1 percent
18. A system having connected load of 100 kW, peak load of 80 kW. base load of 20 kW and average load of 40 kW, will have a load factor of___________
a. 40%
b. 50%
c. 60%
d. 80%.
19. What is the load factor of a power plant?
a. Greater than unity
b. Less than unity
c. Always more than unity
d. Normally more than unity
20. The group of electrical equipment or apparatus used to change characteristic of electric power is known as___________.
a. Generating station
b. Sub station
c. Utilizing system
d. all of the above
21. Which of the following points must be kept in view while designing or layout a substation?
a. It should be located at proper site
b. It should be easily operated
c. It should involved minimum initial cost
d. It should provide safe and reliable arrangement
e. all of the above
22. Classification of substation can be____________.
a. according to service requirement
b. According to constructional features
c. Both a and b
d. neither a nor b
23. Voltage in Primary distribution system is____________.
a. 220KV
b. 33 KV
c. 11 KV
d. 400KV
24. The bus bar conductors are supported on____________.
a. Pin type insulators
b. Post type insulators
c. Strain type insulators
d. Both b or c
25. In substation which of the device is a carrier communication device_______
a. CVT
b. Earth conductor
c. Wave trap
d. Lightning arrestor
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