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Engine Fundamentals LEVEL 1 > Chapter 11 > Flashcards

Chapter 11 Flashcards

1
Q

engine blocks material

A

iro, aluminium

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2
Q

word cast refers to

A

how the block was made

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3
Q

bore means?

A

drill or machine a hole

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4
Q

cast iron holes can be checked by

A

magna fluxing

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5
Q

aluminium blocks holes can be checked by

A

penetrant dye nd black light

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6
Q

what is deck

A

top surface of the head

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7
Q

cylinder taper measurements should not be exceeded than?

A

0.1524mm

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8
Q

Out- of roundness shouldn’t exceed than?

A

0.381mm

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9
Q

how to measure roundness

A

telescopic gauge

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10
Q

criss- cross grooves in the cylinder (crosshatch) shouldn’t be more angular than?

A

20-60 degrees

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11
Q

if the angle of crosshatch is too flat, what can it cause?

A

excessive oil consumption

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12
Q

what is the thin residue on the cylinder walls due to heat and piston movement?

A

glaze

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13
Q

How to deglaze the cylinder walls

A

by wiping down cylinders with alcohol or lacquer thinner

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14
Q

what do techs use to deglaze cylinder walls?

A

ball hone

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15
Q

what to use when honing the cylinders with hand

A

use drill to attach the honing tool

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16
Q

after-deglazing and honing, how to clean the cylinders?

A

hot, soapy water, stiff bristle brushing lint- free cloth.

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17
Q

what is camshaft duration

A

how long the cam holds the valves open in degrees.

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18
Q

what increases the amount of valve openings

A

rocker arms

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19
Q

what is valve overlap

A

both valves open slightly during intake and beginning of exhaust. for better fuel efficiency.

20
Q

what is the highest portion of one cam lobe

A

The nose (lifts)

21
Q

ramp/flank

A

side portions of the nose that slides the valves

22
Q

contact face of lifters should be which shape?

A

convex

23
Q

who made the first VVT

A

Daimler Chrystler

24
Q

what does hydraulic lifters do?

A

automatically compensates the effects of engine TEMPRATURE

25
Q

what does solid lifters do?

A

needs periodic adjustments, excessive clearance can cause clicking. has roller lifter

26
Q

what are the cam bearings made of?

A

Aluminium or steel with lining of BABBIT/tin

27
Q

best way of cleaning, blocks, cams and cranks

A

water and detergent, put oil immediately to avoid rust

28
Q

The maximum taper and
out-of-roundness is

A

.254mm

29
Q

Bow of the crankshaft when measuring with dial indicator, should be___% of total indicator reading (TIR)

A

50%

30
Q

crankshaft bearing/inserts are of two type. one is split and other is?

A

Full round(one piece)

31
Q

what is thrust bearing

A

just crank bearing with flanges on the sides to bolt it down idk

32
Q

bearing spread

A

Bearing
spread means that
the distance across the
bearing parting edges is
slightly larger than the
bearing bore.

33
Q

how to tell which size of crank bearing to use?

A

The manufacturer uses
colour codes or stamped
numbers to indicate
which bearing size to use

34
Q

what his plastiguage used for?

A

For finding oil clearance between the bearing and the crankshaft

35
Q

what kind of gauge is used to check crankshaft end play

A

feeler gauge or with dial indicator.

36
Q

What is I-Beam of the piston

A

Push-rods provide max strength and minimum weight

37
Q

modern pistons are made of what

A

Aluminium alloy

38
Q

how to ensure that the pistons are being installed correctly?

A

Check the marks on top of the piston and the push. rod

39
Q

Excessive, irregular, or diagonal
scuff marks on the piston indicate what?

A

lubrication,
cooling system, or combustion
problems.

40
Q

what are common compression rings made of?

A

cast iron, cast iron coated with
moly, and cast iron coated
with chrome.

41
Q

what kind of iron is used in rings for normal driving engines?

A

Cast iron offers
a durable wear surface and is
ideal for normal driving

42
Q

what kinda material is used in piston rings for high speeds and severe load conditions?

A

Moly or chrome-faced rings

43
Q

cam changes rotary motion into what

A

reciprocating motion

44
Q

The camshaft is driven by a crankshaft at ____its speed.

A

half

45
Q

most bearings used these days are what kind

A

Inserts bearings.

46
Q

other name of connecting rod journal.

A

Crank Pin

47
Q
A

Engine Fundamentals LEVEL 1 (5 decks)

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