DOT 2 (5/26/21) Flashcards
1.) What is the purpose of ST-19?
To enhance safe working conditions established by project O&M instruction OP-2, general operating procedures for safe clearances, hotline (non-test) orders, and special conditions and other safety documents, and to provide criteria for assessing and mitigating risk of shock and arc flash hazards during equipment used that may result in personal injury.
2.) Is the limited approach boundary for a direct current system equivalent to 10 feet?
No, false
3.) When are rubber insulated gloves inspected?
Gloves are inspected before first use and every six months thereafter.
4.) What are the hazards associated with electrical work?
Electric shock, arc flash, and blast hazards.
5.) What entity is responsible for generating warning signs and labels and issuing them to the field divisions to affix to equipment?
Electrical Engineering Services
6.) _________ and _________ are responsible for providing PPE with an Arc Thermal Protective Value (ATPV) reading sufficient for magnitude and nature of that identified hazard within the work to be accomplished?
Branch Chiefs (Superintendents); Supervisors.
7.) What is FR?
Flame Resistant (FR) clothing and PPE required for work in Hazard Risk Cat 1 environments.
8.) _______ _________and their ________ shall be rated for circuits and equipment to which they will be connected?
Test instruments; Accessories
9.) What boundary can be crossed by an unqualified worker while being escorted by a qualified worker?
Limited approach boundary
10.) Can an unqualified person cross a restricted approach boundary?
False, under no circumstance can an unqualified person cross this boundary.
11.) What kind of work is allowed on energized circuits?
Testing and troubleshooting can be accomplished by Qualified People
12.) When does the NEC require a job safety brief/pre-work safety briefing?
A. Before the start of each workday
B. At the start of each new job
C. If the worksite conditions change
D. When personnel assigned to the job change
13.) For an electrical safe condition to exist, do circuits need to be de-energized?
Yes, true
14.) What area does not require the use of FR clothing?
Exclusion areas
15.) Before using electrical gloves, what must take place?
Inspection and proof testing for defects must take place.
16.) Is jewelry or metal allowed to be worn when working on or near energized equipment?
Jewelry and metal objects are never to be worn when working on or near this type of equipment.
17.) At what voltage does ST-19 consider equipment to be energized?
At 50 volts or higher
18.) What organization is considered to be the industry standard for electrical safety in the workplace?
The National Fire Protection Association (NFPA) 70E
19.) Can an arc flash be hotter than the sun?
Yes, four times hotter than the surface of the sun at 35,000°F
20.) What amount of current can cause heart fibrillation?
.100 A (100 mA); .200 A (200 mA)
- Who is allowed to test on any energized equipment?
Only a qualified worker will perform these tasks
22.) What is the ATPV for CAT II?
8 cal/cm2
23.) What type of gloves should be worn over rubber insulating gloves?
Leather protector gloves should always be worn over rubber insulating gloves to provide the mechanical protection needed against cuts, abrasion, and punctures
24.) What class of protective gloves are required for working on 120 volt systems?
Class 00
25.) Can non-arc rated face shields be used as long as they are tinted?
False, face shields must have the proper Arc Thermal Protective Value rating for use
