Q. 1 What were the problems in simple carburetor?
Ans. 1 Less volumetric efficiency.
2 Mal distribution of air fuel mixture in multi cylinder engine.
3 Ice Forming
4 Problem in turning due to tilting of carburetor.
Q.2 What are the three sub systems of electronic fuel injector?
Ans. 1 Fuel delivery system, 2 Air induction System, 3 Electronic control unit.
Q. 3 What are the main components of automobiles?
Ans. 1 Engine,2 Clutch,3 Gear box,4 Universal Joint,5 Propeller Shaft,6 Differentiator.
Q. 4 Why maintenance is required in automobiles?
Ans. 1 Safety of automobiles,2 Reliability of the automobiles,3 Lognitivity of the automobiles,4 Comfortable driving of automobile.
Q. 5 What are the type of lubrication systems?
Ans. 1 Petrol Lubrication system, 2 Scrap feel system, 3 Forced feed lubrication system, 4 Combination of scraps and forced feed system
Q.6 What are the type of fuel injection system in CI engines?
Ans. 1 Air Injection System, 2 Airless Injection System. ( a Common rey injection system,b Individual Pump injection system.
Q.7 What is a master leaf in suspension system?
Ans. The uppermost longest leaf having bushes at its two ends, is known as master leaf.
Q. 8 What is the material of leaf spring?
Ans. Leaf springs are made of
1 medium carbon steel about 0.55 % C,
2 Silicon alloy steel having about 2%Si,1%Mn and
3 Chrome manganese vanadium alloy steel having about 1.5% Cr, 0.6% Mn, and 0.2% V.
Q. 9 How power is generated in the cylinder of IC engine?
Ans. Air is sucked during the crank motion and on compression stroke fuel is injected on it by the nozzle and the automization and vapourisation takes place. Now at proper temperature and pressure this air and fuel mixture starts burning and the chemical energy of the mixture is converted into pressure energy and this pressure energy pushed the piston and hence mechanical power is generated by the piston movement.
Questions on Breaking System
Q. 1 What are the requirements of efficient breaking system?
Ans. The breaking system that stop the vehicle within the smallest distance is called efficient breaking. It is used to sop the vehicle and to control the speed during operation.
Q .2 What are the advantages of hydraulic breaking system?
Ans. Hydraulic breaking requires less breaking effort, and breaking effort is equal to all four wheels.
Q. 3 What is the working principle of hydraulic break?
Ans. Pascal's law.
Q. 4 What is Pascal law?
Ans. If we apply pressure at a point in the fluid then it transfer it in all the direction equally.
Q. 5 Why does break overheat sometimes?
Ans. Breaks overheat due to jammed break shoes or prolonged use of break.
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