Unit 172 (1) Fuel, Ignition, Air and Exhaust

Front

Which one of the following components is shown in the image? Exhaust manifold, Turbocharger, Inlet manifold, Carburettor

Back

Inlet manifold

Front

With a petrol multi-point fuel injection system the fuel is normally injected into the: Cylinder bore, Pre-combustion chamber, Inlet manifold, Exhaust manifold

Back

Inlet manifold

Front

When removing and replacing an inlet manifold, which one of the following is good practice? Replace the: Spark plugs, Air filter, Injectors, Manifold gaskets

Back

Manifold gaskets

Front

Which one of the following is the main reason multi-point injection systems are preferred over single-point injection systems?
Options:
They lower the fuel economy,
They reduce the engine power,
They increase the engine power,
They reduce the engine torque

Back

They increase the engine power

Front

Which one of the following methods should be used to initially test a turbocharger mechanical actuator? Road testing to full boost, Using a vacuum tester and gauge, Measuring the operating speed, Place 12v through the actuator and measure the resistance

Back

Using a vacuum tester and gauge

Front

Which one of the following pieces of equipment should be used to inspect the condition of a fuel pump? Inspection lamp, Mercer gauge, Torque wrench, Pressure gauge

Back

Pressure gauge

Front

A customer has complained of poor running and high fuel consumption and the technician has diagnosed a partially blocked air filter. Which method should be used to check that the vehicle now meets the manufacturer’s specification and customer’s satisfaction? Options: Measure the airflow across MAF sensor, Read the fuel consumption data on the vehicle dash, Road test for good running and improved fuel consumption, Measure the emissions

Back

Measure the emissions

Front

Re-circulating exhaust gases back into the combustion chamber reduces the temperature of the combustion process and reduces

Back

NOx

Front

What do the initials EGR stand for?

Back

Exhaust Gas Recirculation

Front

A vehicle is misfiring and the technician has the data logged from the lambda sensor, which shows that there is high oxygen content. What does this indicate?

Back

Running lean