AST PRACTICE EXAM with 100 QUESTIONS
AND ANSWERS VERIFIED BY EXPERT
What does the acronym ESD stand for? - ANSWER Electrostatic Discharge
Current amount between ____ and _____ can be lethal. - ANSWER
100mA,200mA
What is the number one concern in regards to electrical safety? - ANSWER
Shock
Bohr's Atomic Model consists of what three components? - ANSWER Protons,
neutrons and electrons
Electrons are arranged in _____ around a nucleus. - ANSWER Shells
What are three types of materials used in electronics? - ANSWER Conductors,
semi-conductors and insulators
In the United States there are five common classifications of fires, which are: -
ANSWER A,B,C,D,K
Coulomb's Law describes the forces of attraction or repulsion between electrical
charges, which are _________ to the product of the charges ________ to the
distance between them. - ANSWER directly proportional, inversely
proportional
, The magnetic field that surrounds a magnet can best be described as invisible
lines of force, and are commonly referred to as: - ANSWER lines of flux
An analog multimeter (AMM) checks for: - ANSWER voltage, current and
resistance
An oscilloscope with two vertical inputs, is commonly referred to as a __________
oscilloscope. - ANSWER Dual-trace
Voltage or potential difference is the measure of potential energy between two
points in a circuit and is commonly referred to as: - ANSWER Voltage drop
What is impedance? - ANSWER The resistance of a component at a given
frequency
A resistor has three color bands of red, brown and brown. What is the ohmic value
of this resistor? - ANSWER 210 Ohms
What components value is measured in millihenries? - ANSWER Inductor
Ohm's Law characterizes the relationship between: - ANSWER power,
resistance, current and voltage
Ohm's Law states that resistance is calculated by voltage divided by current. Using
Ohm's Law, how do you determine power? - ANSWER Voltage times current
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