Mod1 Flashcards
——————- is our most versatile form of energy.
electrity/electrical energy
the word electricity comes from the word ——————.
electron
matter is made up of electricity? t/f
true
central nucleus, positively charge?
proton
outer sector, negatively charge?
electron
as temperature increases, electron moves rapidly and splits at very high temperature. t/f
true
electrons flowing in the conductor is known as?
electric current
electrical pressure, the potential to do work.
voltage
voltage is compared to a?
water pressure
movement of electric charge (electrons).
current
current is compared to a?
moving water
amount of electricity flow in a conductor.
current
force which causes electrons to flow a conductor.
voltage
opposition of a material to the flow.
resistance
amount of energy or work that can be delivered by the current and the voltage.
power
path of flow of energy
circuit
objects which are part of a circuit and through which current flows.
circuit elements
a current flow through an unintended path.
fault
defines the relationship of the voltage, the current and the resistance in the electrical circuit.
ohm’s law
two types of voltages
-high voltage
-low voltage
660 volts or more
high voltage
transmission lines
high voltage
less than 660 volts
low voltage
distribution lines
low voltage
(2) electrical wiring system
-line to line
-line to ground
more accidents happen at high voltage area. t/f
false
(2) types of electric current
-dc
-ac
an electric current flowing in one direction only.
direct current
electric current that reverses its direction of flow (polarity periodically accordig to a frequency measured in hertz, or cycles per second.
alternating current
(2) types of materials as to electrical resistance
-conductor
-insulator
any material that offers little resistance to the flow of an electric current.
conductor
any material that is very poor conductor of electricity and prevent current from taking unwanted paths.
insulator
minimum current at which human being feels an electric shock (slight tingling sensation) is about ?
1.8mA at 60Hz
the limit current at which the human being can endure the pain of an electric shock ?
more than 3mA
maximum current at which human body can still move is about?
5-16mA but can cause secondary accidents
the inner resistance of a human body is about?
500-1000ohms
physical damage directly to the body from the electric current.
primary injuries
physical damage to the body resulting from accidents caused by the shock.
secondary injuries
provided to protect equipment not people. This stops the flow of electricity before any problem can develop.
Circuit breakers
GFCI stands for?
Ground fault circuit interrupter
A fast acting circuit breaker which senses small imbalances in the circuit caused by current leakage to ground.
GFCI
Standard procedures for the control of hazardous energy sources which covers maintenance of machines .
Lock out / tag out system or LOTO
Device that utilizes a positive means such as lock to hold an energy isolating device in the safe position and prevents energizing of an equipment.
Lockout device
A warning device, such as tag and a means of a attachment .
Tagout device
Is an unforseen situation that
threatens your employees, customers, or the public;
disrupts or shuts down your operations; or causes
physical or environmental damage.
Workplace emergency
Emergencies may be natural or manmade and include
the following:
(3)
- Natural Disasters
- Technological
- Human
Identify different emergency scenarios ahead of time and define emergency
procedure/plan for each scenario.
Pre-plans
Prepare resources in advanced and as a redundancy
(e.g. emergency numbers directory, floor plans, evacuation maps, assembly areas,
emergency supplies, logistics, tools to account people, emergency food and water, etc.).
Pre-plans
Establish authority during emergencies. Who’s in-charge, who
will do what, define roles and responsibilities.
Incident Command Structure
Identify training needs, conduct employee trainings and drills in a regular
basis covering all possible scenarios.
Employee Training
Continuously improve the plan which covers not only the
procedure but covers all resources needed (e.g. equipment, facilities, supplies, etc.) through
regular inspections, audits, drills, post-incident reviews, periodic document review, and
evaluation of the program/system effectiveness.
Management System Review
refers to medical attention that is administered immediately
after the injury occurs and at the location where it occurred.
First aid
It often
consists of a one-time, short-term treatment and requires little
technology or training to administer
First aid
Purpose of First Aid: (5)
- Preserve life.
- Prevent illness or injury from becoming worse.
- Relieve pain, if possible.
- Promote recovery.
- Protect the unconscious.
Standard First Aid Programs:
- Basic Life Support (BLS) - Cardiopulmonary resuscitation (CPR)
- Basic First Aid
Is the only authorized/recognized organization to
conduct training and certify First Aiders.
Red cross
