Safety

Question 1

Define an electric shock

Answer 1

Involuntary action of body by a current

Question 2

List 3 causes of electric shock

Answer 2

1. Equipment failure
2. Human failure
3. COmbination of both

Question 3

What is the max resistance between equipment & the ships hull?

Answer 3

0.1 ohm

Question 4

List 4 causes of accidents

Answer 4

1. Preoccupation
2. Ignorance
3. Over familiar
4. Horseplay

Question 5

How to minimise accidents?

Answer 5

1. Know hazard, know precaution
2. First aid
3. Discipline
4. Habit of noticing potential hazards

Question 6

List 3 things to check before working on “dead” equipment

Answer 6

1. Stick to safety procedures
2. LOTO
3. Check between each phase & phase to earth

Question 7

What is high voltage defined as?

Answer 7

1000 AC or 1500 DC

Question 8

Who is involved in the control of the HV system?

Answer 8

• Authorising engineer (MEO)
• Authorised person
• Authorised person in control
• Competent person

Question 9

List 5 HV documentation

Answer 9

1. Permit to work
2. Sanction to test
3. Limitation of access
4. Switching schedule
5. Isolation certificate

Question 10

What is a dangerous compartment?

Answer 10

Fire or explosion hazard

Question 11

Give 4 dangerous compartment

Answer 11

1. Aircraft hangar
2. Workshops
3. Paint store
4. Magazines

Question 12

Name 4 regulations for electrical installation in dangerous compartments

Answer 12

• Cable runs (not running thru,not within 5 feet of deck)
• Light fittings (Flameproof,double pole switches,outside compartment)
• Portable lighting * *(Low V,approved type)
• Motors & control gear (prohibited or in flameproof enclosures)