ELECTRICAL CRAFT HELPER REVIEW EXAM 2025 QUESTIONS AND ANSWERS
What is Matter? - (answer)Matter is anything that has mass and occupies space. It contains millions of
invisible particles called molecules
What is Matter made of? - (answer)Matter is made of molecules and atoms
What is a Molecule? - (answer)A molecule is the smallest particle into which matter can be divided
without changing its identity and still be called by the same name. All molecules are composed of atoms.
What is an Electrical Current? - (answer)It is Electricity in motion and represents the transfer of energy
from one place to another and the flow of electrons in a conductor. Electricity is also capable of
converting energy from one form to another.
Name six sources of power from raw energy - (answer)Coal, oil, natural gas, uranium, wood & wind.
Name the three specialized technical steps that provide electricity - (answer)Generation, Transmission &
Distribution
How does a generator plant produced electricity - (answer)Its produce by turning a shaft, on which is
mounted a powerful electromagnet. The shaft turns inside a cylindrical iron shell called a stator. The
rotating electromagnetic field, acting on wire coils in the stator, produces electricity.
What is a Volt? - (answer)It is the unit of electrical pressure or electromotive force or potential
difference. Electricity flowing along a wire may be compared to water flowing through a pipe.
What is the atom? - (answer)It is the smallest particle that makes up that type of material called an
ELEMENT.
What retains its characteristics when subdivided into atoms? - (answer)Elements
What is the core of the atom called - (answer)Nucleus
What is Matter? - (answer)Matter is anything that has mass and occupies space. It contains millions of
invisible particles called molecules
What is Matter made of? - (answer)Matter is made of molecules and atoms
What is a Molecule? - (answer)A molecule is the smallest particle into which matter can be divided
without changing its identity and still be called by the same name. All molecules are composed of atoms.
What is an Electrical Current? - (answer)It is Electricity in motion and represents the transfer of energy
from one place to another and the flow of electrons in a conductor. Electricity is also capable of
converting energy from one form to another.
Name six sources of power from raw energy - (answer)Coal, oil, natural gas, uranium, wood & wind.
Name the three specialized technical steps that provide electricity - (answer)Generation, Transmission &
Distribution
How does a generator plant produced electricity - (answer)Its produce by turning a shaft, on which is
mounted a powerful electromagnet. The shaft turns inside a cylindrical iron shell called a stator. The
rotating electromagnetic field, acting on wire coils in the stator, produces electricity.
What is a Volt? - (answer)It is the unit of electrical pressure or electromotive force or potential
difference. Electricity flowing along a wire may be compared to water flowing through a pipe.
What is the atom? - (answer)It is the smallest particle that makes up that type of material called an
ELEMENT.
What retains its characteristics when subdivided into atoms? - (answer)Elements
What is the core of the atom called - (answer)Nucleus
