MCQ on Electrical Sub-Station

1. Where is Step-Up or Primary Substations positioned?
(a). Load centers
(b). Generating stations
(c). Towns
(d). Industrial areas

Answer
           B

2. What is the purpose of Step-Down or Distribution Substations?
(a). Elevating voltage for long-distance transmission
(b). Reducing voltage for end consumers
(c). Facilitating switching operations
(d). Handling extremely upper voltage levels

Answer
           B

3. What is the operating voltage range of High Voltage Substations (HV Substations)?
(a). 11 kV to 66 kV
(b). 132 kV to 400 kV
(c). Up to 11 kV
(d). Above 400 kV

Answer
           A

4. What is the primary function of Extra Upper Voltage Substations (EHV Substations)?
(a). Local power distribution
(b). Handling higher voltage levels
(c). Facilitating street lighting
(d). Converting AC to DC power

Answer
           B

5. What distinguishes Ultra Upper Voltage Substations (UHV Substations) from Extra Upper Voltage Substations (EHV Substations)?
(a). Operating voltage range
(b). Service rendered
(c). Importance in the grid
(d). Design characteristics

Answer
           A

6. What do failures in Town Substations potentially result in?
(a). Grid failure
(b). Efficient energy supply
(c). Higher voltage levels
(d). Street lighting malfunction

Answer
           A

7. How are Indoor Type Substations characterized?
(a). Suitable for higher voltages in contaminated environments
(b). Equipped with outdoor structures
(c). Suitable for voltages up to 11 kV
(d). Reserved for transformers with capacities exceeding 250 kVA

Answer
           C

8. What is the primary purpose of Outdoor Substations?
(a). Reducing voltage for end consumers
(b). Housing transformers
(c). Facilitating switching operations
(d). Handling diverse energy demands

Answer
           B

9. How are Pole-Mounted Substations designed for?
(a). Local power distribution
(b). Efficient energy supply
(c). Long-distance power transmission
(d). Street lighting

Answer
           A

10. When are Foundation-Mounted Substations typically used?
(a). For voltages unelevated 11 kV
(b). For transformer capacities exceeding 250 kVA
(c). For switching operations
(d). For handling extremely upper voltage levels

Answer
           B

11. What is the primary purpose of Grid Substations in the energy grid?
(a). Handling extremely upper voltage levels
(b). Local power distribution
(c). Facilitating the zillion transmission of power
(d). Reducing voltage for end consumers

Answer
           C

12. How do substations contribute to cost-effective long-distance power transmission?
(a). By elevating low voltage to primary transmission levels
(b). By facilitating switching operations
(c). By housing equipment for street lighting
(d). By serving load centers directly

Answer
           A

13. What is the specialized function of Switching Substations?
(a). Reducing voltage for end consumers
(b). Facilitating switching operations
(c). Converting AC to DC power
(d). Elevating low voltage to primary transmission levels

Answer
           B

14. What distinguishes Converting Substations from Transformer Substations?
(a). Voltage range
(b). Service rendered
(c). Operating voltage
(d). Frequency modification

Answer
           D

15. What is the operating voltage range of Extra Upper Voltage Substations (EHV Substations)?
(a). 11 kV to 66 kV
(b). Above 400 kV
(c). 132 kV to 400 kV
(d). Up to 11 kV

Answer
           C

16. What distinguishes Ultra Upper Voltage Substations (UHV Substations) from Extra Upper Voltage Substations (EHV Substations)?
(a). Design characteristics
(b). Importance in the grid
(c). Service rendered
(d). Operating voltage range

Answer
           D

17. What is the primary purpose of Town Substations?
(a). Managing extremely upper voltage levels
(b). Elevating low voltage to primary transmission levels
(c). Facilitating switching operations
(d). Distributing energy within urban areas

Answer
           D

18. Under what circumstances are Indoor Type Substations suitable for higher voltages?
(a). When the surrounding environment is contaminated
(b). When voltages are unelevated 11 kV
(c). When metal corroding gases are present
(d). When there are conductive pebbles and fumes

Answer
           A

19. How are Outdoor Substations remoter classified based on transformer capacity?
(a). High Voltage and Extra Upper Voltage
(b). Pole-Mounted and Foundation-Mounted
(c). Transformer and Switching
(d). Indoor and Outdoor

Answer
           B

20. What is the primary purpose of Pole-Mounted Substations?
(a). Serving load centers
(b). Local power distribution
(c). Handling extremely upper voltage levels
(d). Elevating low voltage to primary transmission levels

Answer
           B