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This set of Energy Conversion Multiple Choice Questions & Answers (MCQs) focuses on Energy Conversion Set 12
Q1 | The string efficiency in an ac system is
- 100%
- Zero
- 50%
- 25%
- 70.70%
Q2 | In a thermal power plant, among the variable costs, fuel accounts for nearly
- 20 to 25 percent of total cost
- 30 to 50 percent of total cost
- 75 to 80 percent of total cost
- 90 to 98 percent of total cost
- None of the above
Q3 | Alternating current power is transmitted at high voltages
- to safeguard against pilferage
- to minimise transmission losses
- to reduce cost of generation
- to make the system reliable
- None of the above
Q4 | For low head and high discharge the hydraulic turbine preferred is
- Jonval turbine
- Francis turbine
- Kaplan turbine
- Fourneyron turbine
- Pelton wheel
Q5 | The initial cost of an equipment is Rs. 20 lakhs and depreciated cost after ten years is Rs. 15 lakhs. The useful life of the equipment is
- 5 years
- 15 years
- 20 years
- Cannot be determined on the basis of the information provided
- 10 years
Q6 | The output of a solar cell is of the order of
- 0.1 W
- 0.5 W
- 1 W
- 5 W
- None of the above
Q7 | Radio carbon has half life of
- 17 years
- 117 years
- 557 years
- 5770 years
- None of the above
Q8 | Candela is the unit of
- Luminous flux
- Luminous intensity
- Wavelength
- Brightness
- None of the above
Q9 | Direct conversion of heat into electric power is possible through
- batteries
- fuel cells
- thermionic converters
- All of the above
- None of the above
Q10 | Bottoming cycle is common in
- cement plants
- sugar millls
- paper mills
- All of the above
- None of the above
Q11 | Which of the following domestic utility item consumes maximum power?
- Ceiling fan
- Exhaust fan
- Cooking range
- Refrigerator
- Mixer grinder
Q12 | Compressed air is required generally in which of the following power plants?
- Nuclear power plant
- Hydro-electric power plant
- Steam power plant
- Diesel engine power plant
- All of the above
Q13 | In steam power plants exhaust steam from turbine goes to
- cooling tower
- economiser
- condenser
- air preheater
- None of the above
Q14 | Satellites are powered by
- Batteries
- Solar cells
- Photo electric cells
- Thermo-electric generators
- Thermoionic converters
Q15 | The unit of luminous flux is
- Steradian
- Candela
- Lumen
- Lux
- None of the above
Q16 | Out of the following system of distribution, which system offers the best economy?
- Direct current system
- AC single phase system
- AC 3 phase 3 wire system
- AC 3 phase 4 wire system
- None of the above
Q17 | Guard ring transmission line
- improves power factor
- reduces earth capacitance of the lowest unit
- reduces transmission losses
- improves regulation
- None of the above
Q18 | If the capacitance between two conductors of a 3 phse line is 4
- 2
- 4
- 8
- 12
- All of the above
Q19 | The calorific value of lignite is expected to be around
- 10,000 kcal/kg
- 5000 kcal/kg
- 1000 kcal/kg
- 1500 kcal/kg
- 2500 kcal/kg
Q20 | Metals approach superconductivity condition
- at high temperatures
- at melting point
- near 0?C
- near absolute zero
- None of the above
Q21 | Diesel locomotives in India are manufactured at
- Varanasi
- Ajmer
- Parambur
- Chitranjan
- Bangalore
Q22 | Low utilization factor for a power plant indicates that
- plant is under maintendance
- plant is used for base load only
- plant is used for standby purpose only
- plant is used for peak load as well as base load
- None of the above
Q23 | Which relay is used on transmission lines?
- Thermal relay
- Buchholz relay
- MHO relay
- Reactance relay
- None of the above
Q24 | Which distribution system is more reliable?
- Ring main system
- Tree system
- Radial system
- All are equally reliable
- None of the above
Q25 | All of the following places are associated with oil refineries EXCEPT
- Mathura
- Kanpur
- Bombay
- Koyali
- None of the above