The after-cooler fitted to a turbo-charged engine will:, Decrease the air density by increasing the air temperature, Increase the air density by decreasing the air temperature, Increase the air density by increasing the air temperature, Decrease the air density by decreasing the air temperature, In a petrol engine, pinking is a term used to describe:, A main bearing noise, Abnormal combustion, The engine over cooling, A lack of engine revs, In the combustion process of a CI engine, the time between the fuel being injected and itself-ignited is known as:, The lag period, The phase period, The delay period, The lead period, Injector in a high-pressure common rail fuel system:, Are triggered electronically to deliver fuel into the cylinder from the high pressure rail, Deliver fuel into the cylinder from the rotary type injection pump, Deliver fuel into the manifold from the rotary type injection pump, Are triggered electronically to deliver fuel into the manifold from the high pressure rail, After changing the fuel filter, the fuel system is bled to ensure:, Fuel pressure is maintained, There is additional fuel in the system, There is air in the system, There is no air in the system, The abbreviation CO with reference to the exhaust gas means:, Completely Organic, Carbon Dioxide, Carbon Monoxide, Oxides of Nitrogen, Secondary air injection helps lower levels of:, Noise , Engine temperature, HC, NOX, CO2 and CO, HC and CO, An advantage of a Compression Ignition engine over Spark Ignition engine is:, CI engines discharge combustion blow-by gases into the atmosphere, Better thermal efficiency and torque characteristic, Lower compression ratio allows easier starting, Increased engine speed, Nitrogen, Carbon Dioxide and Carbon Monoxide are usually found in:, Petrol, Exhaust gases, Coolant mixture, Diesel Fuel, In a petrol injection system, the components which measures the air pressure in the engine manifold is:, The EGR system, The MAP sensor, The DOHC, The KPI, Octane rating is a property of:, Diesel, Petrol, Brake Fluid, Water, The slight delay before the turbo-charger respond, once the accelerator as been depressed, is defined as:, Lag, Lead, Boost, Delay, Which of the following is normally an indication of a very weak mixture setting for a petrol engine?, Very high fuel consumption, Black exhaust smoke, Very white spark plug insulator, High & CO in exhaust gases, In the combustion cycle of a CI (diesel) engine, the delay period is the:, Crank shaft angle during which the injectors spray fuel into the combustion chamber, Crank shaft angle during which the injected fuel burns rapidly to release heat energy, Amount of time before self-ignition, when the injected fuel absorbs heat, Amount of time during which the air in the cylinder is compressed by the raising piston, The term cetane rating used to classify:, Brake fluid, Diesel fluid, Coolant, Petrol, A distributor-less for a four-cylinder engine uses:, Four coils, One coil, Contract breaker points , A wasted spark type of ignition, The lambda sensor is usually located:, In the exhaust number one port, In the exhaust front pipe, In the exhaust tail pipe, In the exhaust silencer, A Lambda sensor measures:, Carbon monoxide, The flow of the exhaust gases, Fuel vapour, Oxygen, When testing the exhaust emissions, the abbreviation HC refers to:, Hydrocarbon, Hydrogen, Oxides of nitrogen, Carbon monoxide, When tested the exhaust gas of an engine contains an excessive amount of Carbon Monoxide, one likely cause of this is:, A leaking exhaust manifold, A defective oil pump, A leaking inlet manifold , A defective spark plug, In a single point fuel injection system there is:, A carburettor for all cylinders, One injector for each cylinder, A high pressure common rail, One injector to feed all cylinder.

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