1.Explain how timing belt works?

Answer: Timing belt rests on the crankshaft pulley and either one or two camshaft pulley; they are all align through timing belt. The closing and opening of engine valves are controlled by camshaft to let in air and fuel mixture or exhaust gas, if you do not have a timing belt or damaged timing,  it will directly affect the timing of opening and closing of engine valves. This is the reason it is called timing belt and if not in a good position, it will damage your engine.

 2.Explain what is the difference between Crankshaft and Camshaft?

Crankshaft: It is linked to the pistons by the connecting rods, the force produced by the fuel-air mixture is transmitted to the crankshaft and converted to rotary motion as the crankshaft turns.

Camshaft:  It controls the intake and exhaust valves. It is linked with crankshaft either by timing chain or belt, and it turns one rotation for each two rotations of the crankshaft, for each valve it operates- the cam opens each valve at the correct time to draw fuel and air mixture or expel the exhaust gas

3.What may cause  engine overheat?

v  Engine gets overheat when

v  Coolant leaks

v  Cooling system clogged

v  Weak radiator cap

v  Thermostat stuck shut

v  Inoperative electric cooling fan

v  Bad fan clutch, slipping fan belt, missing fan shroud

v  Too high or low concentration of anti-freeze

v  Collapsed radiator hose or debris in the radiator

v  Restricted exhaust system

4.What is automotive charging system is made up of?

Answer: Automotive charging system is made up of

o   Battery

o   Voltage Regulator

o   Alternator

5.What is the standard reading in voltmeter for functional battery?
Answer: For functional battery, the standard reading for voltmeter is 14-15 which is normal, but if reading shows 13 or less then, there is a problem with the battery.

6.How can you judge whether the problem is due to alternator and not due to battery?

·         To judge the problem for an alternator, there are few steps you can try

·         Run your car and unplug the positive connection of the battery, if the car stops then it is more likely there is a problem with the alternator

·         Another way of checking alternator is by checking interior lights, usually an alternator charges your car battery when the car is on.  If the interior lights come on brightly and fades away slowly, it indicates that the alternator cannot keep a charge when the car is running.  It means there is a problem with the alternator.

·         You can also check by racing your car with headlights on, if the light brighten up when you race the car and lose power when you slow it down, indicates a problem with the alternator

7.Explain what are the components in alternator and how it works?
Answer: An alternator consists of the stator, rotor and copper wiring. The rotor and stator are belt driven magnets encased in copper wiring, which creates a magnetic field.  This belt is connected with engine, so when engine starts it rotates the rotor and generate a magnetic field. Stator converts this magnetic field into voltage that flows to the diode.  The diode assembly converts the AC electricity to DC, which is used by car battery.

8.What are the important components of Engine lubrication system?

Important components of engine lubrication system includes

Oil pan: It is a container where engine oil settles down when car is not running

Pickup tube: When engine starts oil get sucked up through pickup tube

Oil pump: The pump will help to slide up oil into the tube against the gravity

Pressure relief valve: It relieves the pressure on oil

Oil filter: It removes dirt and debris form the oil

Spurt holes and galleries: These are the holes in the crankshaft or other parts of the engine through which oil streams and make them lubricated

Sump: Once it has lubrication job is done it will go back again into oil pan or sump

9. Explain what is kingpin offset?

Answer: Kingpin offset the part, which is usually used as a pivot in the vehicles steering.

10.What do you mean by CC when mentioning car efficiency?

Answer: CC stands for Cubic Centimetres; it tells the total volume of the engine cylinder.  It indicates that the automobile with more CC produces more power than the other engines.