Grounding and bounding lvl1 test

On a corner grounded 480-volt, 3-phase, 3-wire, delta-connected system, the voltage to ground from the ungrounded conductor is ? .

480V

A ground-fault current path for a grounded system or an ungrounded system could include which of the following? Select one: a. Equipment grounding conductors b. Metal piping systems c. The Earth itself d. All of the above

All of the above

Which of the following are characteristics of an effective ground-fault current path? Select one: a. Intentionally constructed b. Low-impedance electrically conductive path c. Designed and intended to carry current during ground-fault conditions d. All of the above

All of the above

When a person receives an electric shock, the path for current through the body can be which of the following?a. Foot to foot b. Hand to foot c. Hand to hand d. Any of the above

Any of the above

Where the Code requires a conductive part or a system to be grounded, a connection to ? is implied and required.

Earth

Current will take only the path of least resistance when attempting to return to the source.

False

Electrical systems that are grounded shall be connected to earth to provide which of the following functions?I. Facilitate overcurrent device operationII. Limit line surges, or unintentional contact with lines of higher voltage III. Limit the voltage imposed by lightningIV. Stabilize voltages during normal operation

II., III., and IV

Which of the following is not accomplished through electrical bonding?

Providing overcurrent protection

Which of the following best defines the word ground?

The Earth

High-impedance grounded systems are effective in reducing arc-flash hazards.

True

If there is no connection to the ground (Earth) there is no grounding.

True

The earth must never be depended on to function as an effective ground-fault current path.

True

The frame of an automobile or airplane is not grounded.

True

The processes of grounding and bonding work simultaneously to reduce potential differences between conductive parts and the earth, thereby reducing shock hazards.

True

When an electrical system is not grounded, there is no intentional connection between any of the system conductors and the earth.

True

When electrical systems or equipment are grounded, the ground (earth) is part of the electrical circuit.

True

Not connected to ground or to a conductive body that extends the ground connection best describes which of the following terms?

Ungrounded

Which of the following is not a conductive body that extends the ground connection?

Ungrounded branch-circuit conductors

If the Code provides a requirement to ground equipment, it generally implies that there will be either a direct connection to the earth or a connection to ground through which of the following?a. Equipment grounding conductor b. Grounding electrode c. Grounding electrode conductor d. Any of the above

d. Any of the above

The practical safeguarding of persons and property from hazards arising from the use of electricity best describes which of the following?

d. The purpose of the NEC

A(n) ? occurs when electrical current in a circuit returns through the equipment grounding conductor (EGC), through a conductive material such as the electrical system ground (metal, water pipes, and so forth), through a person, or through a combination of these ground return paths.

ground fault

A(n) ? is an electrically conductive path from the point of a ground fault on a wiring system through normally non-current-carrying conductors, equipment, or the Earth to the electrical supply source.

ground-fault current path

When an electrical system is grounded, one conductor of the system is intentionally connected to ground and is referred to by the NEC as the ? conductor.

grounded

The ? is the conductive object directly connected to earth through which grounding is established.

grounding electrode

The frame of an automobile is typically connected to the ? of the vehicle electrical system.

negative side of the battery

The opposition to current in a DC circuit is ? .

resistance

Grounding includes two basic concepts: grounding of equipment and grounding of systems

True

In a grounded system, normally non-current-carrying electrically conductive materials that are likely to become energized, such as building metal framing and metal water piping, shall be connected together and to the electrical supply source in a manner that establishes an effective ground-fault current path.

True

In an ungrounded electrical system there is normally no connection to Earth from any conductor supplied by the system, other than through distributed leakage capacitance.

True

Loose connections in the equipment grounding conductor and effective ground-fault current path introduce additional impedance that can impact overcurrent protective device operation.

True

If a conductive part is connected to ground or to a conductive body that extends a ground connection, it is ?

b. grounded

Effective ground-fault current paths perform all but which of the following functions?

d. They require the earth to perform its intended functions.

The earth as a conductive body can serve as an effective ground-fault current path to facilitate the operation of fuses or circuit breakers protecting the system.

False

An unintentional, electrically conducting connection between the ungrounded conductor of an electrical circuit and the normally non-current-carrying conductors, metallic enclosures, metallic raceways, metallic equipment, or earth best defines which of the following?

Ground faul

The total opposition to current in an AC circuit is known as circuit ? .

Impedance

All electrical conductors and equipment covered by the NECare required to be installed in a neat and workmanlike manner.

True

Which of the following are performance functions of grounding on a grounded electrical system?I. Protecting against line surgesII. Protecting against unintentional contact with higher voltage linesIII. Providing an effective ground-fault current pathIV. Stabilizing voltage to ground

I., II., and IV.

Bonding minimizes potential differences between conductive parts that are bonded together. It also safeguards against shock hazards, and, in many cases, ensures an effective path for ground-fault current.

True

Which of the following conditions is not a factor in a person receiving an electric shock?

There must be properly sized overcurrent protection in the circuit.