On This Page

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