TEST YOUR BLOCK KNOWLEDGE

QUESTION : (1) What is meant by the term dry sleeve?
ANSWER

QUESTION : (2) What is meant by the term wet sleeve?
ANSWER

QUESTION : (3) What are the two common materials blocks are made out of?
ANSWER

QUESTION : (4) What properties of a cast-iron block are superior to an alloy block?
ANSWER

QUESTION : (5) What properties of an alloy block are superior to a cast iron block?
ANSWER

QUESTION : (6) What is the purpose of a stress plate when boring an engine?
ANSWER

QUESTION : (7) What is the recommended amount of material left to hone out of a bore when boring and why?
ANSWER

QUESTION : (8) What is a cross hatch pattern referring to?
ANSWER

QUESTION : (9) What is unidirectional honing and what can it cause?
ANSWER

QUESTION : (10) What is plateau honing?
ANSWER

QUESTION : (11) What is a bottle brush or flex hone?
ANSWER

QUESTION : (12) What is the preferred method of honing that reduces the ring bed -in period with current design rings?
ANSWER

QUESTION : (13) What does line boring a block describe?
ANSWER

QUESTION : (14) When surface grinding a block face what engine assembly procedure has to be considered?
ANSWER

TEST YOUR HEAD KNOWLEDGE

QUESTION : 1) Name the 3 specific types of cylinder heads?
ANSWER

QUESTION : (2) Under what conditions do exhaust valves normally operate? And why do exhaust valves burn more often than inlet valves?
ANSWER

QUESTION : (3) Why do exhaust valves normally have wider tappet clearances than inlet valves?
ANSWER

QUESTION : (4) Why do inlet valves generally have larger heads than exhaust valves?
ANSWER

QUESTION : (5) What modifications have to be carried out on the average cast-iron cylinder head when converting to LPG?
ANSWER

QUESTION : (6) What can valve guide wear cause?
ANSWER

QUESTION : (7) Why is valve spring tension important?
ANSWER

QUESTION : (8) Why is it important to know the nominal cylinder head thickness?
ANSWER

QUESTION : (9) What is meant by " straightening a cylinder head"?
ANSWER

QUESTION : (10) Why do bent OHC cylinder heads have to be straightened before they are surface ground?
ANSWER

QUESTION : (11) What does sencro-seating describe?
ANSWER

QUESTION : (12) What is a cylinder head vacuum test?
ANSWER

QUESTION : (13) What is a cylinder head crack test?
ANSWER

QUESTION : (14) What is a cylinder head pressure test?
ANSWER

TEST YOUR CRANKSHAFT KNOWLEDGE

QUESTION : (1) What is the main purpose of a crankshaft in an engine?
ANSWER

QUESTION : (2) What are some of the materials cranks are made from?
ANSWER

QUESTION : (3) What is the nodal point in a crankshaft?
ANSWER

QUESTION : (4) What is a fillet radii?
ANSWER

QUESTION : (5) What two tests should be carried out before grinding a crankshaft.(especially diesel shafts)?
ANSWER

QUESTION : (6) What is the general minimum hardness of an non-hardened shaft measured in RC (ROCKWELL C)?
ANSWER

QUESTION : (7) What is the general minimum hardness of a hardened shaft measured in RC (ROCKWELL C)?
ANSWER

QUESTION : (8) What three processes are commonly used to harden shafts?
ANSWER

QUESTION : (9) What grit tape should be used to hand linish a shaft?
ANSWER

QUESTION : (10) In what direction should the shaft rotate in relation to the linishing tape when hand linishing?
ANSWER

QUESTION : (11) What is "linishing" trying to achieve?
ANSWER

QUESTION : (12) How is "changing the stroke" achieved when grinding a big end journal?
ANSWER

TEST YOUR CAMSHAFT KNOWLEDGE

QUESTION : (1) What is the main purpose of a cam shaft?
ANSWER

QUESTION : (2) What is the cam journal?
ANSWER

QUESTION : (3) What is a cam lobe?
ANSWER

QUESTION : (4) What is the base circle?
ANSWER

QUESTION : (5) Where are the opening and closing ramps and what are they designed to do?
ANSWER

QUESTION : (6) How is the valve lift governed by the camshaft?
ANSWER

QUESTION : (7) What is meant by valve overlap and when does it occur?
ANSWER

QUESTION : (8) What effect does increased valve overlap have on cranking compression pressure?
ANSWER

QUESTION : (9) What does an engine have a "lumpy" idle with a race cam?
ANSWER

QUESTION : (10) What is the finishing process called that is applied on newly re-ground cam lobes (cast or non-hardened camshafts) and for what purpose?
ANSWER

TEST YOUR OIL PUMP KNOWLEDGE

QUESTION : (1) What 7 general components make up the lubrication system on an engine?
ANSWER

QUESTION : (2) What types of oil pump drives are commonly used?
ANSWER

QUESTION : (3) What 2 types of oil pumps are commonly used?
ANSWER

QUESTION : (4) What is the function of a relief valve?
ANSWER

QUESTION : (5) At what position in the lubricating system is the oil filter and oil strainer fitted?
ANSWER

QUESTION : (6) What is meant by " by pass" and " full flow" oil filters?
ANSWER

QUESTION : (7) What are the three main functions of engine oil in an engine?
ANSWER

QUESTION : (8) What does the rating letters and numbers stand for in the description of an oil.eg SF/CD 20W50?
ANSWER