quiz 2

Question 1

symmetrical port timing

Answer 1

occurs when ports open/close at same number of degrees from dead center but in different quadrants

Question 2

2-stroke engine cylinder location

Answer 2

single cylinder
inline series
v-series

Question 3

open and close intake/transfer ports and exhaust ports

Answer 3

controlled by the piston crown

Question 4

when are intake/exhaust valves open

Answer 4

valve overlap is the length of time at which both valves are open

Question 5

purpose for intake/exhaust opening

Answer 5

the volumetric efficiency increases at high rpm by scavenging cylinder
scavenge the combustion chamber

Question 6

4-stroke valve part that contacts seat

Answer 6

valve face seals against valve seat in cylinder head

Question 7

suzuki service manual major changes

Answer 7

suzuki produces complete service manual whenever a model undergoes major changes

Question 8

5 events of 4-stroke engines

Answer 8

intake
compression
timed ignition
power
exhaust

Question 9

TDC piston position in cylinder

Answer 9

farthest from crankshaft

Question 10

compression event

Answer 10

compression stroke

Question 11

piston movement

Answer 11

piston travels from BDC to TDC

Question 12

purpose of bottom piston rings

Answer 12

scraper rings add to sealing of compression ring

Question 13

stroke events/piston movement

Answer 13

intake: piston first downward stroke
compression: piston first upward stroke
ignition: piston near top of upward stroke
power: piston second downward
exhaust: piston second upward stroke

Question 14

valve closing device

Answer 14

valve coil springs

Question 15

camshaft motions changes via

Answer 15

a mechanical valve controller

Question 16

scavenging

Answer 16

evacuation of spent exhaust gases by the force of incoming air/fuel mixture

Question 17

cylinder measurements point for wear

Answer 17

6 measuring points total
check for taper and out of rounds patterns

Question 18

top end components, 4-stroke

Answer 18

combustion chamber
valve train
camshaft
intake/exhaust ports
cooling passages

Question 19

engine revolutions 4-stroke process

Answer 19

4 strokes
2 crankshaft revolutions
1 camshaft revolution

Question 20

wrist pins retaining clips, position, orientation

Answer 20

the retainer clip opening in line to be with the connecting rod

never re use wrist pin

Question 21

2-stroke engine events in order

Answer 21

intake
compression
ignition
power
exhaust
transfer

Question 22

major moving parts on 2-stroke engines

Answer 22

piston
connecting rod
crankshaft

Question 23

piston construction methods

Answer 23

cast piston because it is light, has a thin wall for low expansion
forged pistons have a thicker wall. contain less silicon which expands more