21⟩ In ‘V’ type engines the included angle between two banks of cylinders is a. 450 b. 600 c. 1300 d. 900
d. 900
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22⟩ The combustion process in a diesel engine is a. Constant pressure process b. Isothermal process c. Constant volume process d. Adiabatic process
a. Constant pressure process
23⟩ In a six cylinder engine there is balance of a. Primary forces only b. Secondary forces only c. Both primary and secondary forces
c. Both primary and secondary forces
24⟩ One of the major causes of FHP in an engine is a. High speed b. High volumetric efficiency c. Piston-ring friction
c. Piston-ring friction
25⟩ During suction stroke the pressure inside the cylinder is a. Equal to atmospheric pressure b. Above atmospheric pressure c. Above or below atmospheric pressure d. Below atmospheric pressure
d. Below atmospheric pressure
26⟩ Tell me what Are Three Methods Of Heat Transfer?
Three methods of heat transfer are conduction, convection and radiation.
☛ Conduction: The transfer of energy by collisions between the atoms and molecules in a material.
☛ Convection: Transfers heat when particles move between objects or areas that differ in temperature.
☛ Radiation: The transfer of energy by waves.
27⟩ Do you know an Injector Pressure In Heavy Vehicles? Why It Is Used?
Injector pressure i s the pressure at which the fuel can be injected into the vehicle. In heavy vehicles, injector pressure is 220 kg/cm square. It is used to set up the standard fuel injection in the vehicles. With the help of injector pressure we can calculate the amount of fuel needed, through the following formula:
Est. Horsepower x B.S.F.C / No. of injectors x duty cycle = lb/hr per injector
cc = lb/hr x 10.5
28⟩ Explain how would you prioritize tasks on a busy day and ensure that clients feel supported and valued?
Demonstrates task management and customer service skills.
29⟩ A negative loop in the P.V diagram of an I.C engine is due to a. Pre ignition in the engine b. Suction of air for engine c. Pre opening of the exhaust valve d. High pressure in the cylinder
b. Suction of air for engine
30⟩ The turbulence in diesel engines ensures to a. Increase the volumetric efficiency b. Increase the compression ratio c. Bring the fuel quickly in contact with the air d. Increase the specific fuel consumption
c. Bring the fuel quickly in contact with the air
31⟩ The temperature of the compressed air should be ………….. of the fuel a. Below the flash point b. Above the flash point c. Above the fire point d. Between the fire and flash point
c. Above the fire point
32⟩ Vibration damper ………. a. controls the torsional vibrations b. drives the pulley c. dampens the engine speed d. reduces the speed of the flywheel
a. controls the torsional vibrations
33⟩ For petrol engines the nominal compression ratio will vary between a. 1 to 21 b. 18 to 211 c. 1 to 51 d. 7.5 to 8.51
d. 7.5 to 8.5:1
34⟩ The size of intake valve is a. Smaller than that of the exhaust valve b. Equal to that of the exhaust valve c. Larger than that of the exhaust valve d. Not depending upon the size of exhaust valve
c. Larger than that of the exhaust valve
35⟩ Tell me what is the most complicated repair job you’ve handled? What did you learn from it?
Reveals more about work history.
36⟩ Do you know the Basic Difference Between Bs2 And Bs3 Engine?
The basic difference of BS2 and BS3 engines is the presence of catalytic convertor. Catalytic convertor is present in BS3 engine which helps in reducing the formation of HC and CO. While in BS2 engine, no catalytic convertor is present which forms HC and CO. Thus in BS3 engine there is no emission of harmful CO and HC. The full form of BS is bharat stage, which is a standard of emission in India.
37⟩ Explain me what Is Dtsi? Why This Technology Is Used In Motor Bikes?
DTSI stands for Digital Twin Spark Ignition. This is used to get better combustion in the combustion chamber. In this technique double spark plugs are used to obtain better combustion of fuel in cylinder head. Through this technique fuel is ignited properly. Moreover it provides better efficiency and it is economical in fuel consumption.
38⟩ The heat is added in the cycle at a. Constant pressure b. Constant volume c. Approximately constant pressure and constant volume
c. Approximately constant pressure and constant volume
39⟩ The maximum pressure of air at the end of compression in diesel engines is about a. 10 Kg/cm2 b. 100 Kg/cm2 c. 300 Kg/cm2 d. 30 Kg/cm2
d. 30 Kg/cm2
40⟩ As compression ratio in an engine goes up, the octane requirements of the fuel a. Goes down b. Goes up c. Stay about the same
b. Goes up
