Safety Flashcards
(20 cards)
LOTO procedures
1 Get permission from senior rate
2 identify all points of isolation
3 inform user
4 fill out index sheet
5 complete relative sections of loto
6 complete label A,B,C
7 make sure switched off
8 remove fuses and attach A
9 place part b of LOTO board and c in key box
Dangers of electric current
1mA- involuntarily reaction
10mA- prevent you realising
20 mA- physical damage
30 mA- can kill
3 main ways to eliminate accident
1 Know the hazard
2 Maintain safety discipline
3 Develop the habit of noticing dangers
6 causes of major accidents
Pre occupation
Ignorance/ lack of skill
Over familiarity
Laziness/ fatigue
Physical hazards
Horseplay
Working with live equipment procedures
1 No risks
2 Wear rubber gloves
3 Insulated tools
4 Stand on rubber mats
5 Insulated footwear
6 Aware of voltage
7 Not relying on safe locks
8 Safety locks inoperative
9Never work alone
10 Tools no short circuit
11 Work one handed
12 check equipment has been tested and is in date
Terms of HV live, HV dead, HV safe
HV live - generating high voltage
HV dead - no longer capable of generating
HV safe - HV power sources capable of not generating
Key personnel
1 Authorising Engineer AE - MEO
2 Authorised person AP - wo2/ CPOET
3 Authorised person in control APC CPOET
4 Competent person - CP
5 All members of the ME department who have been trained
What is a safe supply on a board
24 DC volts however no electrical supply is safe
How does the galley isolate power supply
1 Has and audible alarm
2 Afff extinguishers
Biggest fire hazard in the galley
Deep fat fryer
What to wear when operating on tantalum capacitors
PPE
Hazards with tantalum capacitors
May explode, spraying the adjoining components/personal with sulphuric acid
Hazards with selium rectifier
1 Toxic substances are released when burnt
2 dust do not inhale or ingest
PPE must be used such as gloves and filtration mask
Who can authorise LOTO removal
MEO or delegated representative
What to do after coming back of brake
Test for dead
Insure loto is inspected looking at isolations
3 types of changeover switches
Normal / alternative changeover switch
Normal / emergency changeover switch
Normal alternative / emergency change over switch
How to prove something is dead
1 Isolate and tag out
2 prove its dead with GPTME
3 Discharge any capacitors
4 fit shorting straps to prevent recharging
Lotto tag
Part A - on the equipment
Part B - on the lotto board same as part A
Part C-placed in fuse / key storage box
Same as part a and b
Work is never carried out on what voltage
1000v AC
1500v DC
Basic causes of electric shock
Equipment failure
Human failure
Combination of equipment and human
