Safety

Front 1

voltage

Back 1

the difference in potentials between two point

Front 2

current

Back 2

the movement or flow of electric charges

Front 3

resistance

Back 3

the property of material which opposes the flow of electric current

Front 4

ohms law

Back 4

the current flowing in a circuit is directly proportional to the voltage & inversely proportional to the resistance.

Front 5

e= r*i

Back 5

ohms law

Front 6

conductor

Back 6

permits electrons or electric current to flow through it

Front 7

conductors

Back 7

have low resistance to electricity

Front 8

insulator

Back 8

used to provide barrier around a conductor

Front 9

semiconductors

Back 9

can change their resistance to acts as either a conductor or an insulator

Front 10

electric circuit

Back 10

may take multiple paths flowing through all possible circuits

Front 11

equipment grounding

Back 11

connects all conductive materials that enclose electric lines

Front 12

electrical system grounding

Back 12

protects circuits from voltages that may come from lightning or line upsurges

Front 13

bypassing grounds

Back 13

can result in electrical fires and fatal accidents

Front 14

cpd- circuit protection device

Back 14

protects againts circuit malfunction by preventing too much current from passing from power source to the rest of the circuit

Front 15

GFCI - ground fault circuit Interrupters

Back 15

a supersensitive , rapid action power switch which breaks a circyit when there is more than 5ma

Front 16

melting, tripping or opening the break circuit

Back 16

gfci will stop the electric flow by

Front 17

lock out

Back 17

blocking the flow of energy from the power source to the equipment

Front 18

loto

Back 18

protects you from unexpected start up of machines or release of stored energy during service or maintenance

Front 19

lock out

Back 19

place a lock on a disconnected switch to make sure it is not removed from its off position

Front 20

tag out

Back 20

attach a warning sign where the equipment will be energized

Front 21

authorized employee

Back 21

a person who loto the machine

Front 22

affected employee

Back 22

employee whose work involves use or operation of equipment

Front 23

loto safeguards

Back 23

are designed to protect workers

Front 24

shock

Back 24

the passage of electric current through your body

Front 25

electricity

Back 25

a silent visible force that can kill without warning if its dangers are ignored

Front 26

1. basic principles of electric safety

2. safe work practices

3. correct response to emergencies

Back 26

our safety depends on understanding 3 things

Front 27

1. fuses

2. circuit breakers

3. gfci

Back 27

circuit protection device

Front 28

Back 28

resetting circuit protection device

Front 29

Back 29

rules for circuit protection

Front 30

Back 30

donts in using loto

Front 31

Back 31

energy sources

Front 32

Back 32

service or maintenance activities on equipment include

Front 33

preparation

shutdown

isolation

application

control

verify

Back 33

6 steps to loto

Front 34

preparation

Back 34

know the equipment & its energy source before working on it

Front 35

shutdown

Back 35

turn off the equipment

Front 36

isolation

Back 36

find and isolate every form of energy that the machines use

Front 37

application

Back 37

anything that might restore the flow of energy must be locked out

Front 38

lock box

Back 38

places all keys of all employees

Front 39

control

Back 39

control stored energy

Front 40

verify

Back 40

check and double check

Front 41

3 steps to removal and re energizing

Back 41

1. restore work area

2. notify personnel

3. remove loto devices

Front 42

Back 42

degree of injury of shock depends on the

Front 43

1. mild shock

2. severe shock

3. deadly shock

Back 43

electrical emergencies

Front 44

mild shock

Back 44

brief contact with less than 5 ma current

Front 45

Back 45

effectsnof mild shock

Front 46

severe shock

Back 46

longer current contact from 5ma -25 ma

Front 47

Back 47

effects of severe shock

Front 48

deadly shock

Back 48

happens when a workes is frozen to a electrical contact point grealter than 25 ma

Front 49

Back 49

effects of deadly shock

Front 50

Back 50

first aid procedures for mild shock

Front 51

Back 51

first aid procedures for continous shock

Front 52

Back 52

first aid procedure for severe shock

Front 53

mechanical hazards

Back 53

the exposure to moving parts wheter automatic or manually operated

Front 54

points of operation

power transmission

in running nip points

shear points

other moving parts

Back 54

moving parts are as follows

Front 55

points of operation

Back 55

actual work is performed on the material

Front 56

power transmission points

Back 56

where energy or motion is transferred from source to destination

Front 57

nip points

Back 57

two or more components running in opposite directions come in contact with each other

Front 58

shear points

Back 58

where one moving component of a machine runs past one which is stationary

Front 59

machine guards and safeguards

Back 59

these are components that protect the worker from direct contact eoth mechanical hazardw

Front 60

guards

Back 60

static protective device that prevent Access to moving parts

Front 61

barriers, fences, enclosures

Back 61

example of guards

Front 62

safe guards

Back 62

dynamic protective device

Front 63

Back 63

sample of safeguards

Front 64

1. check each guard and safeguard to see if it is in place and operating correctly

2. inspect each guard for signs of abuse l, tampering or damage that could affect its performance

3. test each alarm, warning indicator or emergency system

4. check to see that permanent guards are in place and in good condition

5. examine the ventilation holes or hatches in guards. should be dirt free and not at risk of overheating

6. for moving mechanical parts check presence of appropriate signage

Back 64

inspecting for mechanical hazards

Front 65

Fixed

Interlocked

Adjustable

Self-Adjusting

Back 65

4 types of guards

Front 66

fatalities

Back 66

employeesgetting caught in rotating shafts such as well boring drills & lathes

Front 67

fixed guards

Back 67

•Apermanent part of the machine•Notdependent on any other part to perform the function•Usuallymade of sheet metal, screen, bars or other material which will withstand theanticipated impact•Generallyconsidered the preferred type of guard.•Simpleand durable

Front 68

interlockedGuard

Back 68

•Usuallyconnected to a mechanism that will cut off the power automatically•Coulduse electrical, mechanical or hydraulic systems•Shouldrely on a manual reset system

Front 69

nAdjustableGuard

Back 69

•Veryflexible to accommodate various types of stock.•Manuallyadjusted

Front 70

self-Adjusting>

Back 70

•Theopening is determined by the movement of the stock through the guard.Doesnot always provide maximum protection

Front 71

BenchGrinders

Back 71

requirea work rest with a maximum clearance of 1/8 inch to insure that the work doesnot get drawn into the grinding wheel.

Front 72

push stick

Back 72

cankeep your fingers on the end of your hands!!