Grounding & Bonding

Question 1

What does the standard for competence of responders to hazardous materials/weapons of mass destruction recommend grounding and bonding procedures for?

Answer 1

The transfer of flammable and combustible products from tank cars, highway, cargo tanks, and other products they can give a flammable gases in vapors when heated or contaminated

Question 2

Category, 1 or 2 flammable will liquids, or category 3 flammable liquids with the flashpoint below 100°F (37.8°C) shall not be dispensed in the containers unless nozzle and container electrically interconnected. True or false.

Answer 2

True

Question 3

Volts

Answer 3

The pressure that forces the flow of electrons from one point to another

Question 4

Electricity

Answer 4

The flow of electrons

Question 5

Amperes

Answer 5

The amount of current through a point in one second

Question 6

Ohms

Answer 6

The amount of resistance to the flow of the current. Calculated using ohms law. Resistance equals volts/current.

Question 7

Static electricity

Answer 7

Electricity present on the surface of a non-conductive body were the electricity is trapped, or prevented from escaping

Question 8

Static transfer is equalization of electrical charges. What are the two types?

Answer 8

Conductive where the objects are touching each other.
- inductive, where the objects are not touching each other, and there’s a spark, jumping from one object to the other.

Question 9

What is the definition of a flammable liquid?

Answer 9

A liquid having a flashpoint of less than 140°F (DOT) or 100°F (NFPA & OSHA)

Question 10

What is the definition of a combustible liquid?

Answer 10

A liquid having a flashpoint of greater than 140°F (DOT) or 100°F (NFPA & OSHA)

Question 11

What is the definition of grounding?

Answer 11

The connection of the object to the earth

Question 12

Conductor

Answer 12

An object or substance in which electricity can freely move through such as metals

Question 13

Insulator or nonconductor

Answer 13

Is a material the electricity has difficulty flowing through

Question 14

What is the definition of bonding?

Answer 14

The connection of two or more conductive objects together by the means of a conductor (wire cable)

Question 15

What is the grounding and bonding system?

Answer 15

The connection of the conductive objects together, and each separately connected to the earth

Question 16

What is the relaxation time?

Answer 16

The amount of time it takes an object to discharge the static, build up after grounding and bonding.

It depends on volume and chemical properties. Rule of thumb. Allow 15 minutes relaxation time.

Question 17

Equipotential plane

Answer 17

Conductive parts are bonded together, they effectively illuminate the difference of voltage potential that may exist between the individual conductive parts in that reduces static hazard

Question 18

How does weather affect ground effect

Answer 18

Approximately 20 times more static is generated when humidity is 33% then when it is 65%

Proximately 300 times more static if humidity is only 20%

Question 19

How does soil type affect ground field?

Answer 19

Resistance varies , on composition of moisture content
-Mostly clay resistance should be low
-if mostly sand grounding may be difficult
-rule of thumb: the dryer, the soil, the more resistance it has

Question 20

How does temperature affect grounding?

Answer 20

As temperature goes up, the resistance, lowers

Question 21

What conditions need to happen for ignition from static electricity?

Answer 21

1. Generation of static electricity.
2. Accumulation of static charge with no means to discharge.
3. Spark discharge of adequate energy.
4. Spark discharge in an ignitable atmosphere

Question 22

And all bonding operations involving appliances where is the first connection made?

Answer 22

The damaged unit

P379

Question 23

When doing a liquid transfer from damaged truck, some liquid will remain in the bottom of the container since the pump can only remove liquid to the bottom of the reduction or dip tube. What is the product remaining refer to as?

Answer 23

The heel

P381

Question 24

Up to what pressure vacuum trucks designed to operate?

Answer 24

25. Psi.

P382