Mechanics test lv3

On a four stroke engine how many revolutions would the crankshaft turn when the camshaft completes one revolution?

• 0.5
• 1
• 1.5
• 2

How many main bearings are there on a four-cylinder engine?

• 3
• 4
• 5
• 6

The three main types of oil pumps that could be used on a modern diesel engine are

• gear, lift and eccentric vane
• rotor, lift and eccentric vane
• gear, rotor and eccentric vane
• gear, crescent and eccentric vane.

Which one of the following tests would be the best way to diagnose a badly sealing exhaust valve?

• Block test.
• Emissions test.
• Cylinder leakage test.
• Coolant pressure test.

What could be the most likely cause an engine to have a number of damaged valves?

• An oil pump failure
• A snapped cam belt.
• A damaged big end bearing.
• An incorrect valve clearance.

If a thermostat is stuck open it would cause the engine to run at

• at fixed temperature
• at cooler temperatures
• at optimum temperatures
• at extremely higher temperatures.