SLTC FINAL EXAM QUESTIONS AND ANSWERS

SLTC FINAL EXAM QUESTIONS AND ANSWERS
What do all atoms contain? - CORRECT ANSWER✅✅✅protons, neutrons, electrons



Protons are ______ charged - CORRECT ANSWER✅✅✅positively



Electrons are _____ charged - CORRECT ANSWER✅✅✅negatively



There are two important factors to understanding atoms: - CORRECT ANSWER✅✅✅1. the law of
charges states that opposites attract an likes repel.

2. the law of centrifugal force states that a spinning object will pull away from its center point and that
the faster it spins the greater the force becomes.



What is the outermost shell of an atom? - CORRECT ANSWER✅✅✅valence shell



What are the three categories of an atom? - CORRECT ANSWER✅✅✅1. Conductors

2. Insulators

3. Semiconductors



How many valence electrons so conductors have? - CORRECT ANSWER✅✅✅3 or less



How many valence electrons do insulators have? - CORRECT ANSWER✅✅✅5 or more



How many valence electrons do semi-conductors have? - CORRECT ANSWER✅✅✅4



True or False: One fundamental law of physics states that energy can be converted from one form to
another but can not be created nor destroyed. - CORRECT ANSWER✅✅✅True



What are the 6 basic sources of energy that can be used to detach electrons from their orbits and
sustain current? - CORRECT ANSWER✅✅✅1. Friction

,2. Heat

3. Pressure

4. Chemical Reaction

5. Light

6. Magnetism



Which 4 sources of energy are used primarily in special applications? - CORRECT ANSWER✅✅✅1.
Friction

2. Heat.

3. Pressure

4. Light



Which 2 sources of energy are more commonly used to produce large amounts of energy? - CORRECT
ANSWER✅✅✅1. Chemical Reaction

2. Magnetism



True or False: Static electricity mean moving (lighting is static electricity) - CORRECT
ANSWER✅✅✅False: Static electricity does not move (lighting still is static)



True or False: DC current does not change unless it is turned on or off. - CORRECT
ANSWER✅✅✅True



True or False: AC currents never change direction in the electromagnetic field. - CORRECT
ANSWER✅✅✅False: AC current changes direction many times per second in the electromagnetic
field.



Electrical current is the movement, or flow, of electrons. Current is measured in _______. - CORRECT
ANSWER✅✅✅Amperes



True or False: One amp of current flows through a conductor when one coulomb flows past a given
point in one second. - CORRECT ANSWER✅✅✅True

, Voltage affects many things including: - CORRECT ANSWER✅✅✅1. The amount of insulation needed
for a given power

2. The separation required between line conductors

3. Safe working practices

4. The types of tools needed



The rate of 1 joule of work in 1 second is the basic unit of power, and is called a ______. - CORRECT
ANSWER✅✅✅Watt



A power level of 1 horse power is approximately equivalent to ______ watts. - CORRECT
ANSWER✅✅✅746



The relationship between current, voltage, and resistance was described by Georg Simon Ohm in a form
that is commonly referred to as ______ ___. - CORRECT ANSWER✅✅✅Ohm's Law



Power (watts) is calculated by multiplying _______ times _______. - CORRECT
ANSWER✅✅✅Voltage and Amps



When talking about AC voltage, positive and negative refer to the direction or current flow. Positive
voltage causes electrons to flow away from the stations and negative voltage causes electrons to flow
_____ towards the generating station. - CORRECT ANSWER✅✅✅Towards



The direction of current flow is also known as: - CORRECT ANSWER✅✅✅Polarity



Three things needed to produce alternating current are: - CORRECT ANSWER✅✅✅1. A conductor

2. A magnetic field

3. Relative motion between the two



The strength of the voltage being produced depends on 3 primary factors: - CORRECT
ANSWER✅✅✅1. The number of turns in the coil or wire