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WorksheetsElectrical Safety and Atomic Structure
Total questions: 53
Worksheet time: 29mins
What is the purpose of the "one hand rule" in electrical work?
To work faster with both hands
To reduce the risk of current passing through the heart
To avoid dropping tools
To comply with OSHA regulations
Who is allowed to remove a lockout/tagout device?
Any coworker
Only the person who installed it
The supervisor
OSHA inspectors
Which of these is NOT an electrical safety rule?
Remove metal jewelry
Work on wet floors
Avoid distractions
Use organized tools
What does OSHA stand for?
Occupational Safety and Health Administration
Electrical Safety and Hazard Association
National Electrical Code Organization
Workplace Hazard Prevention Agency
Why should you never remove the grounding prong from an AC plug?
It improves voltage
It prevents electric shock and ensures safety
It makes the device run faster
It reduces resistance
What are valence electrons?
Electrons in the innermost shell
Electrons in the outermost shell
Protons in the nucleus
Neutrons with no charge
What happens when an atom loses an electron?
What is the movement of free electrons called?
Voltage
Current
Resistance
Power
Which material is the best conductor of electricity?
Rubber
Wood
Copper
Plastic
What is the unit of electric current?
Volts (V)
Ohms (Ω)
Amperes (A)
Watts (W)
What is the symbol for voltage?
I
R
V
P
In a closed circuit, current flows from:
Positive to negative
Negative to positive
High resistance to low resistance
Neutral to ground
What happens in an open circuit?
Current flows freely
Current stops flowing
Voltage increases
Resistance disappears
According to Ohm's Law, if voltage increases and resistance stays the same, current will:
Increase
Decrease
Stay the same
Reverse direction
What is resistance measured in?
Volts (V)
Amperes (A)
Ohms (Ω)
Watts (W)
Ohm’s Law states the relationship between:
Voltage, current, and power
Voltage, current, and resistance
Resistance, power, and conductivity
Conductors, insulators, and semiconductors
If resistance increases and voltage stays constant, current will:
Increase
Decrease
Stay the same
Become zero
What is the formula for Ohm’s Law?
W = I × R
P = I × V
R = V / I
I = V / R
Power in an electrical circuit is measured in:
Volts (V)
Amperes (A)
Ohms (Ω)
Watts (W)
Which equation represents Power Law?
P = I × V
W = I × R
I = V / R
What is the NEC?
National Electrical Code
National Energy Commission
Nuclear Electrical Committee
New Electric Circuit
In a series circuit, if one light bulb burns out, what happens to the others?
They stay lit
They turn off
They get brighter
They flicker
What does a "tagout" warn others about?
High voltage
Not to restore power
Low resistance
Grounding issues
Which of the following is a safety device in electrical systems?
Resistor
Fuse
Conductor
Insulator
What is the primary function of a grounding prong?
Increase current flow
Prevent electric shock
Reduce resistance
Boost voltage
What is the purpose of reducing the risk of current passing through the heart?
To reduce the risk of current passing through the heart
To increase the efficiency of the heart
To enhance blood circulation
To improve heart rate
Who should work on wet floors?
Only the person who installed it
Anyone with proper safety gear
Only cleaning staff
No one, it's unsafe
What does OSHA stand for?
Occupational Safety and Health Administration
Office of Safety and Health Authority
Organization for Safety and Health Advancement
Occupational Standards and Health Agency
Why is it important to prevent electric shock?
It prevents electric shock and ensures safety
It saves energy
It improves device performance
It reduces electricity bills
Where are electrons located in an atom?
Electrons in the outermost shell
Electrons in the nucleus
Electrons in the innermost shell
Electrons in the proton
What happens to an atom when it becomes a positive ion?
It becomes a positive ion
It gains electrons
It becomes neutral
It gains protons
What is the symbol for current?
Current
I
C
A
What is the chemical symbol for copper?
Cu
Co
C
Ca
What is the unit for measuring electric current?
Amperes (A)
Volts (V)
Ohms (Ω)
Watts (W)
What is the symbol for voltage?
V
A
Ω
W
What is the direction of current flow?
Negative to positive
Positive to negative
Left to right
Right to left
What happens when current stops flowing?
Current stops flowing
The circuit becomes open
Voltage increases
Resistance decreases
What happens to resistance when it increases?
Increase
Decrease
Remain the same
Fluctuate
What is the unit for measuring resistance?
Ohms (Ω)
Volts (V)
Amperes (A)
Watts (W)
What are the three components of Ohm's Law?
Voltage, current, and resistance
Power, energy, and time
Force, mass, and acceleration
Speed, distance, and time
What happens to resistance when it decreases?
Decrease
Increase
Stay the same
Fluctuate
What is the formula for Ohm's Law?
V = I × R
V = I + R
V = I / R
V = R / I
What is the unit for measuring power?
Watts (W)
Joules (J)
Amperes (A)
Volts (V)
What is the formula for calculating power?
P = I × V
P = V / I
P=I2×R
P=V2/R
What does NEC stand for in electrical circuits?
National Electrical Code
National Energy Commission
Network Equipment Center
New Electronic Circuit
What should be done when circuits are turned off?
They turn off
They remain on
They explode
They short circuit
What should not be done to restore power?
Not to restore power
Check the circuit breaker
Replace blown fuses
Call an electrician
What is the purpose of a fuse in a circuit?
To protect the circuit by breaking the connection if the current is too high
To increase the current in the circuit
To decrease the voltage in the circuit
To store electrical energy
Why is it important to prevent electric shock in circuits?
Prevent electric shock
Ensure circuit functionality
Reduce energy consumption
Improve circuit efficiency
Which of the following is a renewable source of energy?
Coal
Oil
Solar
Natural Gas
True or False: Wind energy is a non-renewable resource.
True
False
Fill in the blank: The main component of natural gas is ____.
Methane
Ethane
Propane
Butane
Which gas is primarily responsible for the greenhouse effect?
Oxygen
Nitrogen
Carbon Dioxide
Hydrogen
