The function of the capacitor in the conventional ignition system is$,$

a$)$ Directing the high voltage to the correct spark plug.

b$)$ To accelerate the decrease of the current in the primary circuit.

c$)$ To create induction within the induction coil.

d$)$ To ensure the formation of a strong arc between the platinum tips.

e$)$ Keeping the battery fully charged while the engine is running.

The acceleration pump inside the carburetor is designed not to operate at maximum economy. $($TRUE or FALSE$)$

Restricted air bleeding system is used to obtain maximum power at maximum gas. $($TRUE or FALSE$)$

Temperature and pressure sensors are used to control fuel flow in electronic fuel injection systems of spark ignition engines.

$($TRUE or FALSE$)$

Centrifugal or vacuum advance mechanisms are used in the electronic ignition systems of spark ignition engines. $($TRUE or

FALSE$)$

Real engine and air$-$fuel cycle have different compression ratios.$($TRUE or FALSE$)$

There is no idle jet in double throat carburetors. $($TRUE or FALSE$)$

Which of the following statements is incorrect?

a$)$ As the load of the spark ignition engine increases, the volumetric ratio of carbon monoxide in the exhaust gas increases.

b$)$ The near$-$surface boundary layer is one of the sources of hydrocarbon emissions.

c$)$ Carbon dioxide emissions from internal combustion engines are one of the reasons for the "greenhouse" effect.

d$)$ Exhaust gas recirculation is done to reduce carbon monoxide emissions.

e$)$ It is possible to reduce nitric oxide emissions by reducing the compression ratio.

The function of platinum is to ensure that the magnetic field collapses by cutting off the current in the primary circuit of the

conventional ignition system. $($TRUE or FALSE$)$

The helical cavity on the pusher piston in the sequential fuel injection pump of diesel engines is used to lubricate the piston.

$($TRUE or FALSE$)$

Instead of physically cutting off the current in the electronic ignition circuit, the current in the primary circuit is cut off by a

transistor. $($TRUE or FALSE$)$

If the platinum tips are oxidized, the capacitor in the conventional ignition circuit will not be fully charged. $($TRUE or FALSE$)$

If transistor controlled magnetic mist ignition system is used;

a$)$ The fuel injection system must use a single$-$hole injector nozzle.

b$)$ The carburetor has an extra choke butterfly valve.

c$)$ The distributor does not need an automatic advance mechanism.

d$)$ There is no platinum inside the distributor.

e$)$ Capacitive type spark plug must be used.

Distributor type fuel pump is used in fuel injection systems of locomotives. $($TRUE or FALSE$)$

In modern engines, a catalytic oxidation filter is used to reduce nitric oxides coming out of the exhaust pipe. $($TRUE or FALSE$)$

Carburetors used for fuel supply in diesel engines have double throats to obtain maximum power. $($TRUE or FALSE$)$

In spark ignition engines, fuel supply first started with multi$-$point injection and then single$-$point injection systems were

used. $($TRUE or FALSE$)$

The fuel$/$air ratio of a combustible mixture is between $12$ and $18.($TRUE or FALSE$)$

The air$/$fuel ratio of a flammable mixture is between $12$ and $18.($TRUE or FALSE$)$

If the equivalence ratio $($f$)$ of the air$/$fuel mixture is greater than one, a lean mixture is given to the engine. $($TRUE or FALSE$)$

In spark ignition engines, the equivalence ratio $($f$)$ of the air$/$fuel mixture during idle operation is greater than one.

$($TRUE or FALSE$)$