Lubrication and Working with Numbers

Question 1

Two mating surfaces moving together cause?

Answer 1

Friction

Question 2

Friction causes.

Answer 2

Heat
Wear
Reduces Machinery efficiency

Question 3

Two types of friction are common to rotating equipment.

Answer 3

Rolling and Sliding

Question 4

What is the main function of any lubricant?

Answer 4

To form a Film

Question 5

There are several important basic to understand when discussing lubrication name six of them…

Answer 5

VISCOSITY
CONSISTENCY
FILM
BOUNDARY LAYER
HYDRODYNAMIC
PARTIAL HYDRODYNAMIC

Question 6

The measure of the fluidity of an oil at a given temperature is?

Answer 6

VISCOSITY

Question 7

Oil becomes ______ when temperature increases and becomes ______ when temperatures decrease.

Answer 7

THINNER/LIGHTER
THICKER/HEAVIER

Question 8

What are the main causes in bearing failure on rotating equipment?

Answer 8

GREASE and OIL CONTAMITION

Question 9

Too much grease can cause a high speed bearing to?

Answer 9

OVER HEAT

Question 10

When applying grease what two things should be considered?

Answer 10

SPEED and TEMPERATURE

Question 11

What formula can be used to determine the amount of grease if there are no instructions or charts to use?

Answer 11

GREASE IS MEASURED IN GRAMS 0.005
BEARING DIAMETER and WIDTH MEASURE IN MM.
G = .005xDxW/B

Question 12

Understand working with numbers. Solve these simple problems.
96+3= 23-4=
235+24= 97-46=
4,983+238= 2,062-485=

Answer 12

99 21
259 51
5,221 1,577

Question 13

24x6= 460/5=
345x67= 480/16=
1593x487= 12,345/15=

Answer 13

144 92
23,115 30
775,791 823

Question 14

What is the universal formula for pi?

Answer 14

pi = 3.14

Question 15

what are the formulas to find perimeter/circumference of a..
Circle (has two)
Square
Rectangle
Triangle

Answer 15

C pi(Diameter) C=2pi(radius)
Sq P=4xLength
Rec P=(2XLength)+(2xHeight)
Tri P= a+b+c

Question 16

Formulas to find the area of..
Circle has (two)
Square
Triangle

Answer 16

Circle A=pi(radius ☓ radius)
A=pi(Dia X Dia)
Square A= Multiply 4 sides
Triangle A=L x H

Question 17

Formula for volume in objects such as…
Cylinder
Square
Rectangle

Answer 17

Cylinder V=A x h
Square V= L x 3
Rectangle V= L x H x D

Question 18

Conversions are very important convert these fractions into decimals..
1/4 3/4
1/2 15/16
3/8 16/32
5/8 16/64
7/8 32/64
9/16 197/200

Answer 18

1/4= .25 3/4= .75
1/2= .5 15/16= .9375
3/8= .375 16/32= .5
5/8= .625 16/64= .25
7/8= .875 32/64= .5
9/16= .5625 197/200= .985