L Saftey Flashcards
3 types of change over switches
Normal/Alternate
Normal/emergency
Normal/emergency/alternate
How would you prove a circuit is dead
Using voltage tester to measure for 0 volts between a phase and a phase and a phase and earth
What hazards are associated with tantalum capacitors
If explode can release sulphuric acid
What hazards are associated with Selenium rectifiers and what should you wear if they burn out
Release toxic dust and BA
What is the cleaning agent used on electrics
Lotoxane which has flashpoint of 53 degree
What is class 1 radio active valve
Theta
What is radio active class 2
Trefoil
What is radio active caution
Hazardous radio active valve
What 2 live supply voltages would you never work above
1000 AC and 1500DC
What are the 5 human failures
Failure to observe safety procedures,
familiarity,
shoddy work,
working in damp area,
failure to test properly
What do u need to wear when in galley
.dms boots
.pcs/overalls sleeves rolled down
.chefs paper hat
If fire in galley what would you turn off
All supply’s via the isolation switches
What reasons would you work on live equipment and with who
.when no alternative option and given permission from meo
.must be supervised by Me senior rate
Personnel working on live supply must (8 mark)
-do not take unnecessary risk
-wear rubber gloves
-use insulated tools
-stand on rubber insulated mats
-wear insulated footwear
-don’t rely on interlocks
-do not work alone
-work with one hand if possible
Why would you fit shorting straps
To stop recharging
How do you prove a supply is dead
Check for voltage between all phases and earth.GPTME reads 0 volts
Why would you use shorting straps
Prevent re charging
Inserting fuse procedure
-Remove 1 empty fuse holder
-use test equipment to ensure supply is dead
-replace fuse with correct size fuse
When should you test for dead
-When been for a brake
-Handing over or taking over from someone
What does HCOS stand for
Hand change over switch
Why do you turn head away when fitting fuse
Incase of arcing
Fuse insertion procedure
(8mark)
-Remove empty fuse holder
-using test equipment ensure 0volts
-if 0 volts replace fuse
-make sure correct size and rating
-turn head away and smartly insert fuse
-tighten with fuse key
-destroy labels
-complete saftey certificate
-Complete logo index
Biggest hazard in galley
Deep fat fryer
What should you do before changing (hand change over switch) setting
-Ensure motor had stopped
-wait 10 seconds before you change supply
