chapter 1 Flashcards
name four different methods of protection in workshop and give an example of each.
eye and face protection - SAFETY GOGGLES AND FACE SHIELDS WORKING WITH GRINDERS
DUST MASKS- where dust is present and where there could be dangerous fumes present.
gloves - LEATHER GLOVES FOR SHARPOR HOT OBJECTS.
RUBBER GLOVES FOR ACIDS
INSULATING GLOVES SILICONE OR RUBBER WHENN WORKING WITH LIVE CONDUCTORS.
APRONS RUBBER WHEN WORKING WITH DANGEROUS LIQUIDS SUCH AS ACID LEATHER APRONS WHEN GRINDING OR WWELDING.
PRECAUTIONS WHEN WORKING WITH A PRESS DRILL.
LOOSE CLOTHES OR LONG HAIR IS GREAT DANGER
WORKPIECE MUST BE CLAMPED.
DO NOT CHANGE THE SPEED OF BELT DRIVIN MACHINE WHILE IT IS IN MOTION.
ALL SAFETY GUARDS , CLAMPS, SWITCHES ,VICES MUST BE IN GOOD CONDITION.
PRECAUTIONS WITH ELECTRIC WELDING
WEAR WELDING HELMET.
OTHER PEOPLE IN AREA MUST TUR THEIR BACKS TO WELDING.
DO NOT TOUCH THE LIVE AND EARTH ELECTIC ELECTRODES SIMUTANIOUSLY.
OTHER SAFETY EQUIPMENT LEATHER GLOVES LEATHER APRONS LEATHER SPATS WLEDING HELMETS. MOST BODY PARTS MUST BE COVERED BECAUSE UV RAYS CAN CAUSE SKIN BURN.
STEPS FOR ISOLATING A CIRCUIT AN LOCKING OUT FOR MAINTAINANCE.
.INFORM PEOPLE WHO WILL BE AFFECTED BY THE POWER CUT OF YOUR INTENTIONS.
.SWITTCH OF THE MAIN SWITCH SUPPLYING THE LOAD.
.SWITCH OFF THE ISOLATOR LOCK IT IN THE OFF POSITION AND KEEP THE KEY WITH YOU.
.FUSES CAN BE REMOVED AFTER THE SUPPLY HS BEEN SWITCEHD OFF
.A NOTICE MUST BE DISPLAYED AT THE POINT OF ISOLATION WHICH INCLUDES A REASON FOR ISOLATION.
.THE ISOLATED SIDE OF THE CIRCUIT MUST BE EATHED FOR EXTRA PRECAUTION.
.BEFORE THERE IS ANY WORK DONE DOUBLE CHECK TO MAKE SURE THERE ARE NO LIVE CONDUCTORS WITH A TESTER.
.AFTER WORK IS DONE REMOVE TEMP EARTHING CONDUCTORS ANDAND NOTICE BOARDS AND RESTORE THE SUPPLY.
.TEST MACHINERY BEFORE THE START UP.
WHEN LOCKING OUT ENTRY FOR LIVE CONDUCTORS , WHAT SHOULD BE INDICATED ON THE NOTICE BOARD?
NO ENTRY LIVE CONDUCTORS.
EXPLAIN WHAT FLAME PROOFING IS.
REQUIRED WHERE THERE IS FLAMMABLE SUBSTANCES ARE PRESENT.
THERE MUST BE GOOD VENTILATION IN THOSE LOCATIONS.
BAS VENTS ARE REQUIRED IN CLOSED BUILDINGS.
ONLYFLAME PROOF EQUIPMENT MAY BE USED IN SUCH LOCATIONS. A CIRCUIT BREAKER CAN INTERRUSPT ANY CURRENT , EXTINGUISH ANY ARC AND WITHSTAND EXPLOSION WITHOUT IGNITING FLAMMABLE SUBSTANCES.
A FLAME PROOF APPLIANCE IS AN APPLIANCE THAT IS INCAPABE UNDER NORMAL OPERATION OF IGNITING ANY FLAMMABLE SUBSTANCES.
WHEN ELECTICAL EQUIPEMNT IS INSTALLED , CERTAIN REQUIRENTS AND STANDARDS MUST BE MET.NAME A COUPLE.
.REGULAR INSPECTION AND MAINTAINANCE.
.EARTH LEAKAGE MUST BE TESTED REGULARLY.
.ELECTRICAL EQUIPMENT AND CIRCUITS MUST BEPROTECTED AGAINST ELECTRICALFAULTS
ELECTRICAL EQUIPMENT AND CIRCUITS MSUT BE ADEQUITLY PROTECTED AGAINST ELECTRICAL FAULTS.HERE ARE SOME EXAMPLES:
OVERLOAD AND SHORT CICUIT PROTECTION: DESIGNEED TO OUTOMATICALLY DISCONNECT A CIRCUIT FROM THE SUPPLY IN CASE OF OVERLOAD.
INTEROCK SWITCHES: CAUSES A CIRCUIT TO BE OPENED IN THE EVENT OF AN INCORRECT OPERATION.
SWITCH DISCONNECTORS: PROVIDED TO ALLOW DISCONNNECTION OF THE SUPPLY. ITS SHALL BE:
so interlocked that that it is not possible to gain access to the high voltage apparatus without outomatic disconnection.
easy accessible , as close as possible to the high voltage apperatus and lockable.
SWITCH DISCONNECTOR: WHEN IN OPEN PSOITION , SATISFIES THE ISOLATING REQUIREMENTS SPESIFIED FOR A DISCONNECTOR.
DISCONNECTOR: MECHANICAL SWITCHING DEVICE THAT CAN OPEN OR CLOSE A CIRCUIT WHEN NEGLIGIBLE CURRENT IS PRESENT.
MOTOR STARTERS: NO VOLT COIL MUST BE INCLUDED TO ENSURE THAT THE CIRCUIT WILL BE OPEN IF SUPPLY VOLTAGE FAILS OR THE SUPPLY VALUE FALLS TO A VALUE THAT CAUSES A MOTOR TO FAIL.
PORTABLE APPLIANCES REQUIREMENTS:
HIGH QUALITY EQUIPMENT
MAIANTANANCE NB
EQUIPMENT MUST BE RECORDED IN LOG BOOK FOR INSPECTION.
ONCE A MONTH INSPECTION
AVAILABLE FROM NOSA
MOST COMMON ELECTRICAL HAZARDS:CRACKED PLUG TOPS , INCORRECT POLARITY ,CRACKED INSULATION , FRAYEED CORDS , EXPOSED LIVE PARTS , JOINTS IN FLEXIBLE CABLES.
WHEN WORKING WITHPORTABLE TOOLS , DONT STAN ON DAMP PLACES
FIRM FOOTING MUST BE SECURE WHEN WORKING WITH DRILLING MACHINE
CORD AND PLUG MUST BE DRY.
DO NOT WORK WHERE CONDENSATION CAN TAKE PLACE.
GOOD HOUSEKEEPING
CLEAN WALKWAYS
EQUIPMENT MUST BE STACKED ORDERLY.
WORKING AREAS AND WALKWAYS MUST BE KEPT CLEAR.
FLOORS MUST BE SKID FREE
ROOFS MUST BE KEPT LEAK FREE.
ADEQUATE LIGHTING.
GUARD RAILS MUST BE INSTALLED ON STAIRWAYS
WARNING SYSTEM MUST BE INSTALLED FOR EXAMPLE SIRENS FOR GAS LEAKS.
EMERGANCY LIGHTING WHERE REQUIRED
WRITTENN PROOF OF THIS IS REQUIRED.
SYMBOLIC SAFETY SIGNS
TRAINGULAR: WARNING BLACK BORDER WITH YELLOW CENTRE
CIRCULAR WITH DIAGONALPROHIBITS: RED RING WITH RED DIAGONAL LINE AND WHITE CENTRE
BLUE DISC MANDATORY
GREEN SQUARE GENERAL INFO SUC AS DIRECTION ETC
WHITE SQUARE WITH THIN RED BORDER INFORMATIVE LOCATION OF FIRE FIGHTING EQUIPMENT.
MACHINE GUARDING
ROTATING MACHINES NEED SUITABLE GUARDS , MUST NOT BE USED WHEN NOT IN GOOD ORDER.
GRINDERS
TWO TYPES: PORTABLE DISC GRINDER , AND FIXED TYPE BENCH GRINDER.
USE CORRECT TYPE OF DISC ACCORDING TO THE MATERIAL THAT IS BEING CUT.
CHECK DISC FOR CRACKS
MUST NOT BE USED WITHOUT GUARD.
MAKE SURE THAT THE SPARKS CAN NOT REACH FLAMMABLE EQUIPMENT.
BENCH GRINDER: WEAR LEATHER GLOVES OR HOLD OBJECT WITHH VICE GRIP
WEAR GOGGLES.
LADDERS
CHECK FOR CRACKS
STEP LADDER: HINGES AND SUPPORT STRAPS MUST BE CHECKED.
EXTENSION LADDERS HAVE A ROPE WHICH IS PULLED IN ORDER TO EXTEND IT.
LADDERS MUST BE PLACED ON SOLID SURFACE , OR SOMETHAT HOLDS IT AT THE BOTTOM.
ANGLE IT SHOULD BE PLACED: BAASE SHOULD BE 1 THIRD OF THE HEIGHT OF THE LADDER.
WEAR A SAFETY BELT WHEN WORKIN ON A LADDER TO PREVENT FALLING.
WAISTT POUCH TO KEEP EQUIPMENT.
NAME 3 TYPES OF FIRES AND EXTINGUISHERS USED TO FIGHT THEM
CLASS A: SOLID MATERIALS WOOD PAPER ETC. WATER AND SOME DRY POWDER AND FOAM TYPES
CLASS B: FLAMMABLE LIQUIDS PETROL ETC. DRY POWDER AND FOAM TYPES. CARBON DIOXIDE ONES CAN BE USED WITH SMALL FIRES.
CLASS C: CLASS A OR B IN THE VICINITY OF ELECTRICAL APPLIANCES OR CONDUCTORS.IF SUPPLY IS ISOLATED IT CAN BE TREATED NORMALLY.DRY POWDER AND CARBON DIOXIDE TYPES.
