Electrical Studys

 

1] Which of the following relays are over-load relays ?

1 pointA. ThermalB. Electro-magneticC. InductionD. All of the above

2] The speed of circuit interruption enforced blast circuit breaker is___

1 pointA. SlowB. MediumC. FastD. None of these

3] The maximum safe temperature of paper insulated cables is about

1 pointA. 60°CB. 95°CC. 135°CD. 165°C

4] Which variety of mica is hard and brittle ?

1 pointA. MuscoviteB. PhlogopiteC. FibioliteD. Lipidolite

5] The system of laying underground cables adopted in congested areas, where excavation is expensive and inconvenient, is ___

1 pointA. Draw-in-systemB. Solid systemC. Direct layingD. Any of these

6] Under-voltage relays are mostly used for

1 pointA. Transformer protectionB. Bus-bar protectionC. Motor protectionD. Feeder protection

7] Under steady state operating condition, the multiplication factor of nuclear plant is ____

1 pointA. More than unityB. Less than unityC. Equal to unityD. Depend upon the power its generating

8] Routine tests are conducted on ____

1 pointA. Bulk oil circuit breakersB. Minimum oil circuit breakersC. Air blast circuit breakersD. All of the above

9] The pH value of water used for boiler is ____

1 pointA. UnityB. 7C. 10D. Slightly more than seven

10] Which fault gives rise to symmetrical fault currents ?

1 pointA. Single line to ground faultB. Line to line faultC. Double line to ground faultD. Three phase fault

11] Which of the following energy sources is considered a renewable resource for power generation?

1 pointA. Natural Gas B. CoalC. WindD. Nuclear

12] In a thermal power plant, what is the primary function of the boiler?

1 pointA. Electricity generationB. Fuel storageC. Heat productionD. Steam generation

13] What is the typical fuel used in a combined-cycle power plant for electricity generation?

1 pointA. Coal B. Natural GasC. DieselD. Nuclear fuel

14] Which of the following power plants relies on the Rankine cycle for power generation?

1 pointA. Solar power plant B. Hydroelectric power plantC. Geothermal power plantD. Steam turbine power plant

15] What type of energy conversion takes place in a nuclear power plant?

1 pointA. Mechanical to electricalB. Nuclear to mechanicalC. Chemical to electricalD. Thermal to mechanical

16] In a hydroelectric power plant, what is responsible for turning the

1 pointA. Gas turbine B. Steam turbineC. Water turbineD. Wind turbine

17] What is the typical frequency of electricity generated by most power plants in North America?

1 pointA. 50 Hz B. 60 HzC. 25 Hz D. 10 Hz

18] Which type of power plant is known for its high energy efficiency and low greenhouse gas emissions?

1 pointA. Coal-fired power plant B. Natural gas power plantC. Geothermal power plantD. Solar power plant

19] What is the primary energy source for a geothermal power plant?

1 pointA. Fossil fuels B. SteamC. Earth's heatD. Wind

20] Which renewable energy source is harnessed in a solar thermal power plant?

1 pointA. Solar radiation B. WindC. Tidal energyD. Geothermal heat

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