TEST YOUR GENERAL ENGINE KNOWLEDGE
QUESTION : (1) What direction do you turn a distributor to advance the ignition timing?
QUESTION : (2) At what speed does the camshaft turn compared to the crankshaft on a single camshaft engine?
QUESTION : (3) Name the 4 different strokes of a 4 stroke engine in order, starting from the stroke that carries air into the cylinder.
QUESTION : (4) What are the three main purposes of glycol in radiator coolant when mixed at between 30% to 70 % by volume?
QUESTION : (5) What action causes a wet liner in a diesel to suffer from erosion?
QUESTION : (6) What position on the diesel wet liner is more likely to show evidence of erosion?
QUESTION : (7) What side is the thrust side of a cylinder in an engine that turns clockwise if you are looking from the front?
QUESTION : (8) What three common methods are used to drive a camshaft?
QUESTION : (9) When repairing an engine and a single piston has to be renewed out of a set, what 5 important points must be addressed?
QUESTION : (10) What method is necessary to final wash a re-honed bore?
QUESTION : (11) What jingle is used as a general rule to determine the direction rings have to be fitted to a piston?
QUESTION : (12) How do you calculate the compression ratio of an engine?
QUESTION : 13) Super or premium fuel has a higher octane rating than regular fuel, which fuel burns the slowest?
QUESTION : (14) If an engine is pinging, would you advance or retard the ignition timing?
QUESTION : 15) If you had an engine pinging and the ignition timing was set correctly (including the advance curve), what would be the two most obvious things to check as the possible cause?
QUESTION : (16) What does air/fuel ratio represent?
QUESTION : (17) What air fuel ratio is required by a petrol engine to achieve perfect combustion?
QUESTION : (18) What is the term used to measure combustion quality?
QUESTION : (19) What two elements make up all fossil fuels?
QUESTION : (20) What is greater, horsepower measured at the flywheel or at the rear wheels? And why?
QUESTION : (21) When is manifold vacuum greater, at wide open throttle or at idle?
QUESTION : (22) What is the basic difference in operation of a petrol engine and a diesel engine?
QUESTION : (23) What does the term “valve- bounce” describe?
QUESTION : (24) Why can loose tappets cause valve damage?
QUESTION : (25) Why can tight tappets cause burnt valves?
QUESTION : (26) Describe the principal behind angle tightening of torque to yield head bolts.
QUESTION : (27) What does the term “glazed up bore’s” describe and what causes it?
QUESTION : (28) What is the clearance between a big-end bearing and the crankshaft referred to as?
QUESTION : (29) What causes the problem referred to as “ring spin”?
QUESTION : (30) What name is given to compression ring that has the upper face set at an angle and the lower face square?
QUESTION : (31) The compression ring described in question 30 is used in some diesel engines. Why is it used in preference to a square shaped ring?
QUESTION : (32) What general rule can be applied to rings that fit bore size’s 2 inch to 4 inch in regard to minimum “end gap clearance”?
QUESTION : (33) The most common cause of engine failures due to faulty workmanship arise from loose nuts and bolts. With this fact in mind what policy should be adopted in regard to the fitting of nuts and bolts?
QUESTION : (34) Describe how you would fit a dome welsh plug?
QUESTION : (35) What simple rule can be used when selecting the position to adjust valve clearance on the same cylinder?
QUESTION : (36) On a test what visual exhaust smoke indicates worn rings? Name the colour and time of emission?
QUESTION : (37) In a diesel engine what is usually indicated by the appearance of white exhaust smoke on cold starts?
QUESTION : (38) What is the main design difference between a direct injection diesel and an indirect injection diesel?
QUESTION : (39) Simply describe the difference between these induction methods (a) normally aspirated. (b) Turbo charged. (c) supercharged.
QUESTION : (40) What 2 substances in the cooling system are measured with a chemical tester and gas-analyser to indicate a leakage from combustion to water jacket? ( blown head gasket )
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