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This set of Energy Conversion Multiple Choice Questions & Answers (MCQs) focuses on Energy Conversion Set 4
Q1 | Which of the following is a natural solid fuel?
- Pulverised coal
- Wood charcoal
- Bituminous coal
- Coking coal
- None of the above
Q2 | The power factor of a 3 phase induction motor near full load is expected to be around
- 0.5 leading
- 0.5 lagging
- 0.1 lagging
- 0.8 lagging
- 0.8 leading
Q3 | When geothermal energy is available in the form of saline water, power is developed using
- flashed - steam system
- binary - cycle system
- total flow system
- any of the above
- None of the above
Q4 | If an engine has spark plugs, it can be safely concluded that it is
- a two stroke engine
- a air cooled engine
- not a diesel engine
- a four stroke engine
- a water cooled engine
Q5 | No moving parts are required in
- MHD generator
- Tidal power plant
- Thermionic conversion
- OTEC power plant
- None of the above
Q6 | The work of installation and commissioning of power plants in India is generally undertaken by
- NHPC Ltd
- Steel Authority of India
- NTPC Ltd.
- Coal Authority of India
- HAL
Q7 | When the reactive component is small
- the phase angle will be small and p.f. will be leading
- the phase angle will be large and p.f. will be high
- the phase angle will be small and p.f. will be unity
- the phase angle will be small and p.f. will be high
- the phase angle will be large and p.f. will be low
Q8 | Which of the following colour has wavelength between green and red colour?
- Yellow
- Blue
- Violet
- All of the above
- None of the above
Q9 | Which of the following statement is correct?
- Wind pressure reduces corona effects
- Ice on conductors improves power factor
- Wind pressure is taken to act in a direction at right angles to that for ice
- Wind pressure and ice on conductors together improve regulation of power transmitted
- None of the above
Q10 | An Orsat apparatus gives
- volumetric analysis
- gravimetric analysis
- approximate analysis
- only presence of constituents
- None of the above
Q11 | The specific gravity of copper is
- 8.9
- 16.9
- 13.9
- 2.9
- 5.9
Q12 | Conductors for high voltage transmission lines are suspended from towers
- to reduce clearance from ground
- to increase clearance from ground
- to reduce wind and snow loads
- to take care of extension in length during summer
- None of the above
Q13 | Economiser in a steam power plant is used
- To preheat air
- To preheat feed water
- To superheat steam
- None of the above
- None of the above
Q14 | A pin type insulator is generally used upto
- 66 kV
- 132 kV
- 33 kV
- 1.1 kV
- 11 kV
Q15 | Naphtha is a volatile colourless product obtained from
- methyl alcohol
- vinyl acetate
- sugar cane
- petroleum
- None of the above
Q16 | A 66 kV transmission line carrying power to a distance of 120 kilometre will be termed as
- Short transmission line
- Very short transmission line
- Long transmission line
- Medium transmission line
- Tiny transmission line
Q17 | Solar cells are made of
- silicon
- germanium
- silver
- aluminium
- None of the above
Q18 | In case the supply frequency is reduced from 50 Hz to 1 Hz which method of heating will be least affected?
- Resistance heating
- Dielectric heating
- Induction heating
- All of the above
- None of the above
Q19 | Bottoming cycle in case of combined cycle power geneation is normally
- Gas turbine cycle
- Steam cycle
- any of the above
- None of the above
- None of the above
Q20 | The major disadvantage with solar cells for power generation is
- lack of availability
- large area requirement
- variable power
- high cost
- None of the above
Q21 | Earth coal is
- lignite
- coal dust
- black earth
- wet coal
- None of the above
Q22 | Barytes concrete is generally used in
- nuclear power plants
- construction of dams
- foundations for heavy equipment
- construction of cooling towers
- None of the above
Q23 | The disadvantage of using solar evergy for power production is
- Requirements of large area for harnessing solar energy
- Energy available during day time only
- Energy not available during cloudy weather
- Initial cost is high
- All of the above
Q24 | Chain gate stokers cannot be used for
- coal lumps
- low ash content coals
- high ash content coals
- None of the above
- None of the above
Q25 | Heat rate : Efficiency
- Coal : Oil
- Momentum : Variable cost
- Fixed cost : Variable cost
- Resistance : Conductance
- None of the above