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Electrical Craft Helper Practice Test
With Solution
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
Where is most of the mass of the atom concentrated in? - ANSWER Nucleus
What does the Nucleus contain? - ANSWER It contains PROTONS (positively charged particles) and NEUTRONS (electrically neutral).
the wire is toward the _______ battery terminal. - ANSWER Positive
The electron movement along the conductor of a circuit is the same everywhere, provided the applied _________ remains constant. - ANSWER Voltage
