152 Exam

Which one of the following is a fault that would

cause a cooling system to over-pressurise?

• Thermostat opening too soon.

• Recirculation flap stuck closed.

• Head gasket failure between bore and water

  jacket..

• Inlet manifold leak.

During a pressure test, coolant is found to be

leaking inside the vehicle. What is the most likely cause of the leak?

• Thermostat housing.

• Engine water pump.

• Heater control valve..

• Air conditioning condenser.

A benefit of water cooled engine over air cooled

engines is that they:

• Maintain a more constant temperature

• Reach operating temperature more quickly.

• Have less moving parts.

• Provide less chance of corrosion.

On a 4 stroke cycle engine how many revolutions would the camshaft turn when the crankshaft completes one revolution

• 0.5

• 1

• 1.5

• 2

Identify the type of fault that would cause a cooling system to over pressurise

• A head gasket that has failed between bore and water jacket

• An inlet manifold gasket leak

• Thermostat stuck open

• A recirculation flap stuck open

What does specific heat capacity mean?

• The amount of heat required to decrease the temperature of a material by 1°C

• The amount of heat required to increase the temperature of a material by 1°C

• The amount of coolant required to increase the temperature of a material by 1°C

• The amount of antifreeze required to increase the temperature of a material by 1°C

When measuring tooth backlash or body to rotor/gear clearance of an oil pump the tool used would be...

• Micrometer

• Dial test indicator (DTI)

• Feeler gauges

• Vernier caliper

What is the bore measurement of an engine?

• Top dead center to bottom dead center known as swept volume

• Bottom dead centre to top dead centre known as swept volume

• The distance between the con rod big end and small end

• The diameter of the cylinder

Where is the glow plug fitted on the engine?

• Engine block

• Exhaust Valve

• Cylinder head

• Piston and rod

What materials are modern lip type oil seals made from?

• Cork

• Plastic

• PVC

• Neoprene