Electrical Craft Helper Exam Questions and Answers
What is Matter? - -Matter is anything that has mass and occupies space. It contains millions
of invisible particles called molecules
-What is Matter made of? - -Matter is made of molecules and atoms
-What is a Molecule? - -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? - -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 - -Coal, oil, natural gas, uranium, wood &
wind.
-Name the three specialized technical steps that provide electricity - -Generation,
Transmission & Distribution
-How does a generator plant produced electricity - -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? - -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? - -It is the smallest particle that makes up that type of material called
an ELEMENT.
-What retains its characteristics when subdivided into atoms? - -Elements
-What is the core of the atom called - -Nucleus
-Where is most of the mass of the atom concentrated in? - -Nucleus
-What does the Nucleus contain? - -It contains PROTONS (positively charged particles)
and NEUTRONS (electrically neutral).
-What are the six primary methods of producing a voltage (EMF) to cause an electric
current to flow? - -Chemical action, magnetism, friction, Heat, light & Pressure.
What is Matter? - -Matter is anything that has mass and occupies space. It contains millions
of invisible particles called molecules
-What is Matter made of? - -Matter is made of molecules and atoms
-What is a Molecule? - -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? - -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 - -Coal, oil, natural gas, uranium, wood &
wind.
-Name the three specialized technical steps that provide electricity - -Generation,
Transmission & Distribution
-How does a generator plant produced electricity - -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? - -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? - -It is the smallest particle that makes up that type of material called
an ELEMENT.
-What retains its characteristics when subdivided into atoms? - -Elements
-What is the core of the atom called - -Nucleus
-Where is most of the mass of the atom concentrated in? - -Nucleus
-What does the Nucleus contain? - -It contains PROTONS (positively charged particles)
and NEUTRONS (electrically neutral).
-What are the six primary methods of producing a voltage (EMF) to cause an electric
current to flow? - -Chemical action, magnetism, friction, Heat, light & Pressure.
