L Safety

Question 1

What are the 6 major causes of accidents?

Answer 1

Pre occupation 
ignorance or lack of skill
over familiarisation
laziness or fatigue
physical hazards
horseplay

Question 2

How do we tackle the accident problem?

Answer 2

Know the hazard
maintain a safety discipline
Develop the habit of noticing potential dangers

Question 3

What are the 3 main causes of electric shock?

Answer 3

non direct contact - Equipment failure
Direct Contact - Human error
Combination of both - use of defective portable equipment

Question 4

What happens to the human body when exposed different to electrical currents?

  1. @ 1mA – 
  2. @ 10mA – 
  3. @ 20mA – 
  4. @ 30mA –

Answer 4

1. involuntary reaction
2. prevent you from releasing your hold
3. physical Damage
4. Death

Question 5

What voltage on board is considered to be “safe”?

Answer 5

24 VDC

Question 6

What are the correct steps in the electric shock procedure?

Answer 6

-Raise the alarm immediately
-isolate the supply (if you can’t remove casualty with rescue hook
once isolated check for response
-if no response then shout for help
-open airway, check for breathing take appropriate action
-Keep shouting for assistance until help arrives
-Carry out CPR until qualified help arrives

Question 7

Before tagging out a piece of equipment/system what 3 steps must be carried out?

Answer 7

Obtain permission from senior rate to carry out isolation
identify all points of isolation
inform users

Question 8

Describe the steps in the removing fuses procedure ?

Answer 8

1. Placing a finger in the centre of fuse holder firmly
2. With the free hand unscrew fuse holder using a fuse key
3. When fully unscrewed ,firmly grasp the fuse holder turn your head away from the fuse box and remove fuse holder smartly
4. Remove fuse from the holder then place the fuse cover into position
5. repeat with 2nd and 3rd fuse

Question 9

What should happen to the labels after reinstating a LOTO?

Answer 9

The person completing the LOTO should have parts A B C to give to an authorising person to be destroyed

Question 10

What is the resistance of the human body, when dry?

Answer 10

1k olhm but could be lower if body is wet/damp

Question 11

Why is it important to avert your eyes when removing fuses?

Answer 11

to prevent eye damage in the event of sparking

Question 12

When carrying out a LOTO, where should “Part B” of the LOTO be placed?

Answer 12

Tag out board

Question 13

What are the 5 reasons for isolating supplies using the LOTO system

Answer 13

1. To allow maintenance with out hazard to maintainers
2. To isolate equipment that is defective and may be dangerous
3. Where equipment has been removed
4. Where supplies have been provided but equipment has not been fitted
5. prevent selection of mode of equipment operation which may be unavailable or dangerous

Question 14

The LOTO system is comprised of what 4 parts

Answer 14

LOTO index sheet
LOTO label
LOTO Safety certificate
LOTO Display board

Question 15

State the LOTO procedure for REPLACING Fuses. x9

Answer 15

1. The person who conducted the LOTO should be the person who reinstates equipment / system back in.
2. If the original person is not available the Authorising individual can brief another competent person to restore supplies.
3. Obtain permission to restore supplies
4. Ensure equipment is switched off
5. Obtain fuses for correct circuit from LOTO box and remove Part C LOTO label
6. Remove Part B of the LOTO label
7. Remove Part A of the LOTO
8. Replace fuses
9. Hand LOTO labels ABC to the authorising person to be destroyed.

Question 16

State the PROCEDURE for LOTO

Answer 16

Obtain permission from senior rate to carry out isolation
identify all points of isolation
inform users
fill out index sheet and collect next number in sequence serial number
complete relevant sections of LOTO safety certificate and sign
Complete LOTO labels
Make sure equipment is switched off
remove fuse and place Part A LOTO label to empty fuse holder
Place B Label on the LOTO board and C Label with fuse/ keys in box

Question 17

What PPE should be worn whilst working in the galley?

Answer 17

DMS boots
overalls with sleeves rolled down
Chefs paper hat

Question 18

Name the dangerous components and their associated hazards found on board HM Ships?

Answer 18

Tantalum capacitors
selenium rectifiers
Pentane
Radioactive Materials

Question 19

What are the x4 precautions are to be taken when using Penetone TPC?

Answer 19

Keep away from naked flames
supply and exhaust fans are to be running
never to be sprayed directly onto live electrical equipment
always wear rubber gloves

Question 20

How are all galley supplies isolated in the event of a fire?

Answer 20

Red isolation switches fitted outside

Question 21

What is the biggest fire hazard within the galley?

Answer 21

chip pan friers hot oil

Question 22

What specific PPE should you wear when working on tantalum capacitors?

Answer 22

face protection

Question 23

What are the precautions to be taken when working on dead equipment?

Answer 23

Isolate and LOTO
Prove equipment is dead
Discharge any capacitors in the circuit
if required fit shorting straps to prevent capacitors from re-charging

Question 24

How would You prove that a circuit is DEAD before working on it?

Answer 24

By measuring for zero vaults between phases and between phase and earth

Question 25

When you replace Fuses at the Fuse Panel. How do you prove Electrical Switches are open, or not?

Answer 25

by using a voltage tester and measure for 0 volts across the empty fuse ways

Question 26

List the five examples of HUMAN FAILURE that could lead to Electric Shock?

Answer 26

1. failure to observe proper safety precautions
2. shoddy work
3. failure to properly test portable equipment
4. familiarity
5. standing in damp surroundings

Question 27

What is a CP? And What is the definition of one?

Answer 27

CP (competent person) is a person who has sufficient technical knowledge
or experience to enable the person to avoid danger from electrical hazards.