ENG, LUB, COOL REVISION HV2 TEST 1

A four cylinder, four stroke in-line engine with a firing order of 1,2,4,3 If cylinder number 3 is on the induction stroke:

• Cylinder number 2 will be on the compression stroke

• Cylinder number 1 will be on the power stroke

• Cylinder number 2 will be on the exhaust stroke

• Cylinder number 2 will be on the power stroke

An engine lubrication system fitted with a relief valve will:

• Control the viscosity index of the engine oil

• Limit the maximum oil pressure to the bearings

• Allow oil to the bearings if the filter is blocked

• Limit the minimum oil pressure to the bearings

Specific heat capacity is:

• The quantity of heat required to raise the temperature of 1KG of a substance by 1F

• The quantity of heat required to raise the temperature of 1KG of a substance by 1K

• The quantity of heat required to raise the temperature of 1KG of a substance by 10F

• The quantity of heat required to raise the temperature of 1KG of a substance by 10C.

A compression test is used to determine the:

• Condition of the air compressor

• Compression ratio of the engine

• Normal operating pressure

• Mechanical condition of the engine.

A vehicle is presented for repair which has air bubbles in the cooling system when the engine is running. This could indicate a:

• Defective thermostat

• Defective radiator cap

• Blocked heater matrix

• Blown head gasket

The picture shows a typical valve timing diagram. What is indicated by the portion marked X?

• Inlet valve open period

• Exhaust valve lead

• Valve overlap

• Inlet valve lag

Which of the following are the ideal conditions for draining the engine oil during a service?

• Engine off and the oil cold

• Engine off and the oil warm

• Engine on and the oil warm

• Engine on and the oil cold

The compression ratio of an engine can be calculated using the formula:

• Swept volume + clearance volume ÷ clearance volume

• Swept volume ÷ clearance volume

• Swept volume x clearance volume

• Swept volume – clearance volume ÷ swept volume

Supplemental Coolant Additives are sometimes added to compression ignition engines to:

• Increase the cavitation of the coolant

• Decrease the cavitation of the coolant

• Decrease the freezing point of the coolant

• Increase the boiling point of the coolant

It is important to have a pressure vacuum release valve fitted in the cooling system to allow for:

• The results of corrosion by coolant

• The results of cubical expansion of hot coolant

• The results of passenger heater operation

• The results of linear expansion of hot coolant