1 unit 5 2022 7

what would be the symptoms of a faulty DPF?

• high level of oxygen

• high level of hydrocarbons

• high level of particulate matter

• high level of carbon monoxide

what diagnostic equipment would be used to identify CAN Bus system fault?

• noid light

• power probe

• oscilloscope

• digital multi meter

which is one symptom of a faulty exhaust gas recirculation (EGR) valve?

• increased oil pressure

• increased fuel pressure

• increased injector pressure

• increased engine emissions

after replacing an engine oil pump, what should a technician check first when starting the engine?

• the timing marks realign

• the engine revs can be raised quickly

• the warning lamp will be extinguished

• the engine temperature raises quickly

after replacing a timing belt, when should the technician re-check the valve timing to confirm system performance?

• after running the engine at idle

• after turning the engine over by hand

• after cranking the engine with the starter motor

• after allowing the engine to reach operating temperature

if an engine is not reaching optimum operating temperature, what would a technician recommend to rectify the fault?

• replace the thermostat

• disconnect the cooling fan switch

• add antifreeze to the coolant content

• remove the water pump for inspection

what is the check that would be made before refitting a cylinder liner, as indicated by the arrows in the image?

• taper

• bow

• ovality

• run-out

what should be carried out following the replacement of an electric fuel pump on a petrol fuel system?

• calibrate the pump with a multi meter

• remove all air from the system after starting

• check pump current is approximately 12V

• check rail pressure is within operating tolerance

if the distance between the inductive speed sensor and the reluctor ring increases, what effects would it have on the voltage?

• it is reduced

• it is increased

• it changes from AC to DC

• it changes from DC to AC

if the distance between the inductive speed sensor and the reluctor ring decreases, what effects would it have on the voltage?

• it is reduced

• it is increased

• it changes from AC to DC

• it changes from DC to AC