1.What will happen if someone adds oil to the fuel of four stroke bike engine?
Answer: This will result in damaging of the engine faster. Adding oil will lead to the higher wear and tear of the cylinder liner, piston and damage to the piston. It will lead to abnormal combustion and knocking and detonation. Dark smoke and abnormal sounds will be generated by the engine. One should not mix oil with the fuel of four stroke engine.
2.How will you differentiate between two stroke engine and four stroke engine?
Answer: In case of two stroke engine, rotation of crank shaft will be power stroke for every two rotations. During compression stroke, fuel will flow towards the crank case(suction) and during power stroke, exhaust will emit the burnt fuel through the transfer ports. While in case of four stroke engine, rotation of crank shaft will be power stroke for every four rotation. Moreover, suction compression power and exhaust strokes are separate as there will be inlet and exhaust valves.
3.What is the size of the recommended compressor CFM?
Answer: Where it can be used? It is generally used in spray painting of very small areas. It can be used where painting with brush is very difficult. thus to improve the rate of painting the spray painting is used as this method is very fast and efficient. Usually reciprocating compressors are used but size depends on requirements
4.What is the range of engine efficiency in case of two stroke engine?
Answer: The two stroke engines have very high range to be compared to the four stroke engines. Because power stroke is generated every two revolution while in four stroke, power stroke is generated every four revolutions.
5.What do you understand by CC of engine?
Answer: The meaning of CC is cubic centimeters. It represents the total volume of the engine cylinder. This reflects that the engines with more CC can generate more powers than the other engines. CC can also be related as inversely proportional to the fuel consumption.
6.What is back compressor in engines?
Answer: Back compression means the compression capability of the engine. An diesel engine can compress at the ratio of 14:1 to as high as 25:1. Thus the higher compression leads to better efficiency of the engine. Thick black smoke is emitted when the engine’s compression is reduced which leads to the deformed ead-gasket lead into crankcase.
7.How air conditioners work in cars?
Answer: Air conditioners are based on the principles of evaporation and condensation and then compression and expansion. The hot air of the car is removed by the process of evaporation and then the condensation of the evaporated air takes places which is then further compressed by the compressor and then finally expanded to us in the form of cold breeze. Somehow, Air conditioning reduces the average of the car, as the energy is required to remove the hot air and then compression and expansion.
8.Explain how you can keep your car in good condition?
v Regular check-up of parts like
v Check battery
v Tyres and brakes
v Fluid levels ( Coolant, Washer fluid, Brake fluid, Oil, Power steering, etc.)
v Fuel filters and Injectors
v Belts and hoses
v Alternator
v Lubrication of wheel
v Bearing and ball joints
9.How often does a car requires services?
Answer: Car requires services yearly and major maintenance at 6,000 miles.
10.Before buying a used car what things you should look for?
v Any leakage of oil underneath the car
v Check any leakage of coolant water from the radiator
v Check battery condition
v Check whether car emits blue gray, dense smoke or a normal smoke from exhaust pipe
v Watch out for engine noises, any vibrations, lack of power or any other issues
v Check for any burning smells when open the hood
v Check steering wheel, driver’s seat and inner door
v Check tyres ( Edge should not worn out, no bulge on the sidewall, no cuts, enough groves to hold the road)
v Check all meter work fine when you start the car