TPC 205 electrical, safety, and protection Flashcards
The effect of current on the human body depends on the three main factors - the amount of current, the length of time the body contacts , the current and the _____
Path of the current through the body
If a person is a victim of electrical shock, you immediately action should be to ?
Are you sure that the breathing and circulation is maintained
Which of the following can best describe as preventing electrical separation between a worker and a conductor
Insulation
The NEC defined equality person as a person
Is familiar with equipment operations and hazards
When working around you should never wear
Clothes made of polyester
To guardians electric shock you should wear____ gloves for insulation under_______ gloves protection
Rubber ; leather
If a chemical comes in contact with your eyes, your immediate action should be
Rinse Thoroughly
If several workers are working on a single piece of equipment, they should
Each apply a lock to the power source
The barrier tape used to keep personnel out of areas where hazardous electrical work is being performed should be
Displayed at a readily visible level
What time is intended to be used to verify that a circuit has been a deenergize?
Voltage tester
When a piece of equipment is in a zero energy state that means that is
Cannot be activated accidentally
The first step in locking out power to a piece of equipment is to
Notify the operators
If you must use a portable power tool, but only a two slot receptacle is available you should
Use a two wire double insulated tool
If a shock victim appears to be an injured and feels fine you should
Call for Prompt medical assistant
If a victim of electric shock is unconscious you should
check for breathing and a pulse
Shaded text in the NEC and NEC handbook indicates that the information
Has changed since the previous edition
Which of the following would be covered by NEC?
Public schools
Information on branch circuit grounding, and overcurrent protections can be found in NEC chapter
2
Article 430 the most widely used part of NEC chapter 4 deals with______ installation requirements
Motor
The article 760 covers the special installation requirements of
Fire alarms
A tool’s grounding wire carries current
When a ground fault occurs
To evaluate receptacle wiring and grounding quickly use a
Receptacle tester
A GFCI opens a circuit when it detect
Different currents in the conductor of a circuit
Static electrical is commonly generated by
friction between two surfaces
A class C fire extinguisher is intended to use on what kind of fire
Energized electrical equipment
What kind of fuse is design mainly to protect motors circuits
Dual element
According to the NEC rules plug fuses, cannot be used in circuit exceeding _____ volts between conductors
125
In an ambient-compensation circuit breaker a(n) _____ compensation for change in ambient temperature
Bimetallic strip
The most important consideration in selecting a molded-case circuit breaker is
Potential difference
Which of the following is the best course of action to take after a circuit breaker trips
Determine what caused it to trip
If more than one motor is connected to a feeder protecting device, the rating of the device is determined by adding the highest current required for a single motor to the ____ of all the other motors
Full load current rating
The motor running overturn protected device on a motor is usually an
Overload relay
What kind of temperature device consist of a calibrated wire enclosed in a protective shield
Resistance
The disadvantage of using the line fuse used to to protect electric motors is that they only work against
Excess current
Single phase in a three phase motor occurs when
It continues running after one phase is lost
