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This set of Energy Conversion Multiple Choice Questions & Answers (MCQs) focuses on Energy Conversion Set 21
Q1 | A 3 phase 15 kW induction motor has a p.f. of 0.75 lagging. A bank of capacitor is connected in delta across the supply terminals and p.f. raised to 0.9 lagging. The KVAR rating of the capacitors connected in each phase will be nearly
- 1
- 250
- 4
- 2
- 20
Q2 | First aid for an electric shock victim is
- Artificial respiration
- Rubbing the skin
- Pouring water on body
- Bandage
- Massage
Q3 | A turbocharger is a part of
- Gas turbine power plant
- Thermal power plant
- Diesel engine power plant
- Hydro-electric power plant
- Nuclear power plant
Q4 | Steam pressure of super-thermal power plant is
- 100 kg/cm2
- 50 kg/cm2
- 200 kg/cm2
- 15 kg/cm2
- 170 kg/cm2
Q5 | Which of the following enters the super heater of a boiler?
- Wet steam
- Cold water
- Dry steam
- Hot water
- Superheated steam
Q6 | The cost of fuel is least in case of
- Nuclear power plant
- Diesel engine power plant
- Gas turbine power plants
- Steam power plant
- Hydro-electric power plant
Q7 | Due to burning of one kg of pure carbon with a minimum quantity of air required, the percentage of carbondioxide in the exhaust gases would be
- 10%
- 100%
- 58%
- 11.50%
- 29%
Q8 | The useful life of static capacitor can be expected to be
- 2 to 3 months
- 8 to 10 years
- 1 to 2 years
- 6 to 8 months
- 50 to 100 years
Q9 | One kilowatt hour is nearly equal to
- 3.4 B.T.U.
- 34 B.T.U.
- 34000 B.T.U.
- 3400 B.T.U.
- 340 B.T.U.
Q10 | The critical pressure water is
- Less than 200 kg/cm2
- 100 kg/cm2
- More than 200 kg/cm2
- 1 atm
- 150 kg/cm2
Q11 | A single unit of 50 MW is generally not available with which type of power plant?
- Nuclear power plant
- Diesel engine power plant
- Steam power plant
- Hydro-electric power plant
- Gas turbine power plant
Q12 | Most of the generators in thermal power plants run at
- 1500 rpm
- 3000 rpm
- 15000 rpm
- 750 rpm
- 1000 rpm
Q13 | Which of the following state in India is relatively rich in coal deposits?
- Rajasthan
- Andhra Pradesh
- Kerala
- Bihar
- U.P.
Q14 | Least overall efficiency can be expected in which type of power plant?
- Gas turbine power plant
- Diesel engine power plant
- Nuclear power plant
- Steam power plant
- Hydro-electric power plant
Q15 | Which of the following engine has the highest air-fuel ratio?
- Diesel engine
- Petrol engine
- Gas engine
- Gas turbine
- All above has got nearly same air fuel ratio
Q16 | Visible spectrum of light has wavelength in the range
- 10 to 40 A
- 4000 to 7000 A
- 14,000 to 17,000 A
- 100 to 400 A
- 40,000 to 70,000 A
Q17 | Which of the following equipment has power factor closer to unity
- Carbon arc lamp
- Single phase capacitor motor
- Fluorescent lamp
- Induction motor
- GLS lamp
Q18 | Which of the following power plant has the highest cost per kW installed?
- Nuclear power plant
- Hydro-electric power
- Diesel engine power plant
- Steam power plant
- Gas turbine power plant
Q19 | Power factor is expected to be highest in case of
- Tube lights
- Carbon arc lamp
- Sodium lamps
- Mercury vapour lamp
- GLS lamp
Q20 | The major share of power in India is provided by which of the following type of power plant?
- Gas turbine power plants
- Nuclear power plant
- Diesel engine power plant
- Steam power plant
- Hydro-electric power plant
Q21 | 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
- 45 MW
- 30 MW
- 50 MW
- 60 MW
- 70 MW
Q22 | The permissible pH value of water of boilers is
- 1
- Less than 14
- 7
- 5
- Slightly more than 7
Q23 | For extinguishing electrical fires
- Carbondioxide fire extinguisher should be used
- Carbon tetrachloride fire extinguisher should be used
- Rubber pieces should be thrown
- Conductors should be erthed
- Water should be sprinkled
Q24 | In pumped storage plant
- Water is recirculated through turbines
- Downstream water is pumped upstream during off-load periods
- Pressure accumulators are used
- Power is produced by pumps
- Water is stored by pumping to high pressures
Q25 | A graphical representation of discharge and time is known as
- Hectograph
- Hydrograph
- Load duration curve
- Load curve
- Monograph