Automotive Trainer Interview Questions and Answers

The pressure cap in the radiator maintains the pressure in the cooling system to prevent overheating.

• The pressure cap regulates the pressure in the cooling system to prevent overheating.

• It allows excess pressure to escape through the overflow tube.

• It also prevents air from entering the system.

• The pressure rating of the cap should match the manufacturer's specifications.

• A faulty pressure cap can cause overheating and engine damage.

The air fuel ratio of a petrol engine is typically around 14.7:1.

• Air fuel ratio refers to the amount of air and fuel that is mixed together in the engine's combustion chamber.

• Petrol engines typically operate at a ratio of around 14.7 parts air to 1 part fuel.

• This ratio is known as the stoichiometric ratio and is considered the ideal ratio for complete combustion.

• However, in certain situations such as during acceleration or high load, the ratio may be adjusted to provide more ...read more

A turbocharger is a device that increases the power output of an engine by compressing air before it enters the combustion chamber.

• Turbochargers use exhaust gases to spin a turbine, which in turn drives a compressor that compresses the air entering the engine.

• This compressed air allows more fuel to be burned, resulting in increased power output.

• Turbochargers are commonly used in high-performance and diesel engines.

• They can also improve fuel efficiency by allowing smaller engi...read more

Thermostat valve regulates the flow of coolant to maintain engine temperature.

• Regulates coolant flow to maintain engine temperature

• Helps prevent overheating or overcooling of engine

• May be electronically controlled or mechanical

• Commonly located on engine block or in radiator hose

To check a sensor fault, perform a diagnostic scan and analyze the sensor's output.

• Perform a diagnostic scan using a scan tool

• Analyze the sensor's output using a multimeter or oscilloscope

• Check the wiring and connections for any damage or corrosion

• Compare the sensor's output to manufacturer specifications

• Replace the sensor if necessary