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This set of Heat Engines Multiple Choice Questions & Answers (MCQs) focuses on Heat Engines Set 16
Q1 | In a four stage compressor system first and third stage pressures are 1 and 9 kg/cm2 respectively. What will be the fourth stage delivery pressure
- 243 kg/cm2
- 81 kg/cm2
- 3 kg/cm2
- 27 kg/cm2
- 9 kg/cm2
Q2 | In a lead cell battery the voltage per cell is
- 6 volts
- 1 volt
- 1.5 volt
- 2 volts
- 1.1 volt
Q3 | Ignition quality of diesel fuel is expressed by
- Octane number
- Cetane number
- Carbon percentage
- Calorific value
- None of the above
Q4 | The use of Wilson's line for flow calculation is associated with
- Impulse turbines
- Reaction turbines
- Diesel engines
- Steam-nozzles
- Gas turbines
Q5 | Rateau turbine is a
- Velocity compounded impulse turbine
- Pressure compounded reaction turbine
- Velocity compounded reaction turibine
- Pressure compounded impulse turbine
- Pressure-velocity compounded turbine
Q6 | Centrifugal blowers can supply
- Large volumes of air at low pressures
- Large volumes of air at high pressures
- Small volumes of air at high pressures
- Small volumes of air at low pressures
- None of the above
Q7 | To augment the thrust of jet propulsion units part of the fuel is burned in the exhaust. How does this fuel burn
- Some chemicals rich in oxygen are mixed with fuel
- Oxygen is also supplied along with fuel
- 600;1
- Fuel is never burned in exhaust pipe
- Fuel finds oxygen from excess air supplied to engine
Q8 | Intake air filters are provided on air compressor for
- Removing dirt and dust from suction air
- Reducing temperature of suction air
- Reducing pressure of suction pressure
- Removing impurities of air
- None of the above
Q9 | Which one of the following factors will not assist in getting high power output from a compression ignition engine
- High compression ratio
- Fine atomisation of fuel
- High charge density
- Large quantity of excess air
- None of the above
Q10 | The lowest temperature upto which a mercury thermometer can be used is
- ? 39?C
- ? 260?C
- ? 173?C
- ? 10?C
- 0?C
Q11 | In case of a condensing turbine the pressure in the last stage of the turbine is
- Same as atmospheric pressure
- Slightly above the atmospheric pressure
- 5 to 6 kg/cm2 above the atmospheric pressure
- Less than the atmospheric pressure
- 10 to 12 kg/cm2 above the atmospheric pressure
Q12 | The blades of a turbine are made of
- High speed steel
- Cast iron
- Alloy steel
- Nickel alloy
- Stainless steel
Q13 | The frictional horse power of a well adjusted petrol engine should be nearly
- 50%
- 40%
- 25%
- Carbon dioxide
- 10%
Q14 | LPG stands for
- Liquefied petroleum gas
- Low pressure gas
- Light pressure gas
- Lubricated petroleum gas
- None of the above
Q15 | The term scavanging is generally associated with
- High speed engines
- Air cooled engines
- Multi-cylinder engines
- Two stroke engines
- Vertical engines
Q16 | Solubility of a gas in a liquid at small concentration is represented in
- Henry's law
- Clausius Clapeyron equation
- Raoult's law
- Dalton's law
- None of the above
Q17 | The engine provided on scooters is generally
- Four stroke, air cooled
- Four cylinder, air cooled
- Two stroke, double acting
- Two stroke, air cooled
- Four stroke, water cooled
Q18 | The instrument used for the measurement of area of p-v diagram is known as
- Digitometer
- Clinometer
- Planimeter
- Areameter
- Graphometer
Q19 | If in a compression ignition engine the noise level is to be reduced, the design features which will not be affected are
- Combustion system
- Exhaust muffling
- Intake muffling
- Fuel injection equipment
- None of the above
Q20 | For dry saturated steam the value of adiabatic index n is taken as
- 1.135
- 1.41
- 1.35
- 25 to 30
- 1.68
Q21 | In a petrol engine the mixture strength for maximum power is
- 1 ; 5
- Carbon dioxide
- 1 ; 30
- 1 ; 23
- 1 ; 13
Q22 | The main purpose of compounding in case of steam turbines is to
- Reduced speed of rotor
- Reduced exist losses
- Improve thermal efficiency
- All of the above
- None of the above
Q23 | Which of the following is not the same as watt?
- Joule/sec
- Amperes/volt
- Ampere x volt
- (Ampere)2 x ohm
- None of the above
Q24 | In an engine radiator, heat is transferred by
- Conduction
- Convection
- Radiation
- Conduction and convection
- None of the above
Q25 | A rich mixture will have an air-fuel ratio
- Less than chemically correct
- More than chemically correct
- Chemically correct
- Any of the above
- None of the above