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This set of Energy Conversion Multiple Choice Questions & Answers (MCQs) focuses on Energy Conversion Set 10
Q1 | Power factor is expected to be highest in case of
- Carbon arc lamp
- Tube lights
- Sodium lamps
- GLS lamp
- Mercury vapour lamp
Q2 | Low grade fuels have
- Low moisture constant
- Low ash content
- Low calorific value
- Low sulphur content
- All of the above
Q3 | The protection against lightning is provided by
- Earthing screen
- Overhead ground wires
- Lightning arresters
- Surge diverters
- Any of the above
Q4 | Barn is
- spent fuel from a nuclear reactor
- a unit of area
- an electronic instrument for rapid counting of radiations
- a coal that does not form coke
- None of the above
Q5 | The major share of power in India is provided by which of the following type of power plant?
- Gas turbine power plants
- Hydro-electric power plant
- Diesel engine power plant
- Nuclear power plant
- Steam power plant
Q6 | Batteries used for electrical energy storage are
- Leclanche cells
- Edison cells
- Lead acid cells
- Any of the above
- None of the above
Q7 | Which of the following converts electrical energy to radiant heat?
- Solat cell
- Storage battery
- Wankel engine
- Incandescent lamp
- None of the above
Q8 | The most economic voltage for transmitting given power over a known distance by overhead transmission lines is approximately
- 0.6 kV/km
- 1.6 kV/km
- 2.6 kV/km
- 3.6 kV/km
- None of the above
Q9 | Steel poles for transmission lines need protection against
- termites
- borer
- corrosion
- All of the above
- None of the above
Q10 | Integrated demand is
- the demand averaged over a specified period
- the joint-demand of several consumers
- supplementary demand of various consumers
- None of the above
- None of the above
Q11 | Osmotic energy conversion involves energy production from
- low boiling point liquids
- low vapour pressure liquids
- miscible liquids
- salt water
- None of the above
Q12 | Pin insulators are normally used upto voltages of about
- 100 kV
- 66 kV
- 33 kV
- 25 kV
- None of the above
Q13 | A generating station is to supply four regions of loads with peak demands of 10 MW, 15 MW, 20 MW and 30 MW. If the diversity factor is 1.5 the maximum demand on the station is
- 30 MW
- 60 MW
- 70 MW
- 50 MW
- 45 MW
Q14 | The power supplied to domestic consumers is at 220 volts. This represents
- Peak value of voltage
- Mean value of voltage
- rms value of voltage
- Any of the above
- None of the above
Q15 | Diversity factor has direct effect on the
- fixed
- variable
- fixed and variable
- None of the above
Q16 | Gas turbine power plants are being established at all of the following places EXCEPT
- Kawas
- Anta
- Auraiya
- Jagdishpur
- None of the above
Q17 | Which of the following gives nearly monochromatic light?
- Sodium vapour lamp
- GLS lamp
- Fluurescent tube
- Mercury vapour lamp
- None of the above
Q18 | The permissible pH value of water of boilers is
- Less than 14
- 1
- Slightly more than 7
- 7
- 5
Q19 | For a power plant, the cost of labour is considered as
- fixed
- variable
- progressive, non-progressive
- major, minor
- None of the above
Q20 | For extinguishing electrical fires
- Carbondioxide fire extinguisher should be used
- Rubber pieces should be thrown
- Water should be sprinkled
- Carbon tetrachloride fire extinguisher should be used
- Conductors should be erthed
Q21 | Skin effect results in
- reduced effective resistance but increased effective internal reactance of the conductor
- increased effective resistance but reduced effective internal reactance of the conductor
- reduced effective resistance as well as effective internal reactance
- increased effective resistance as well as effective internal reactance
- None of the above
Q22 | Which of the following contributes to the improvement of efficiency of Rankine cycle in a thermal power plant?
- Use of high pressures
- Reheating of steam at some intermediate stage
- Regeneration
- All of the above
- None of the above
Q23 | Which of the following disadvantages occurs due to low power factor?
- Greater conductor size
- Poor voltage regulation
- Large copper losses
- Large KVA rating of transformers
- All of the above
Q24 | Which of the following statement is incorrect?
- As the temperature rises the tension in the transmission line decreases
- As the temperature rises the sag in transmission lines reduces
- Tension and sag in transmission lines are complementary to each other
- None of the above
Q25 | In geothermal power plants waste water is
- recirculated after cooling in cooling towers
- discharged into sea
- discharged back to earth
- evaporated in ponds
- None of the above