Soil Excavation and Protective Systems

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Questions and Answers

What is the term used to describe the pressure that is exerted by a column of fluid due to its weight?

Velocity Head

Head Pressure

Hydrostatic Pressure (correct)

Torricelli’s Law

Which law relates the velocity of a fluid to the pressure difference between two points?

Poiseuille’s Law

Torricelli’s Law

Pascal’s Law

Bernoulli’s Principle (correct)

What is the term used to describe the pressure that is exerted by a fluid in motion?

Static Pressure

Head Pressure

Velocity Head

Dynamic Pressure (correct)

Which of the following is NOT a type of pressure?

Electrical Pressure Signup and view all the answers

What is the term used to describe the energy of a fluid due to its motion?

Kinetic Energy Signup and view all the answers

Which of the following laws is used to calculate pressure loss due to friction in a pipe?

Darcy-Weisbach Equation Signup and view all the answers

What is the term used to describe the sum of the pressure and velocity heads?

Total Head Signup and view all the answers

Which of the following is a key concept in hydrostatics and hydraulics?

Hydrostatic Pressure Signup and view all the answers

What is the purpose of calculating volumetric air flow in ventilation?

To determine the airflow velocity in a duct Signup and view all the answers

What is the term for the pressure that drives airflow through a duct?

Static pressure Signup and view all the answers

What is the purpose of calculating hood entry losses in local exhaust ventilation?

To optimize the design of the hood Signup and view all the answers

What is the term for the velocity of airflow at which a contaminant is captured by a hood?

Capture velocity Signup and view all the answers

What is the purpose of calculating room air changes in ventilation?

To determine the effectiveness of ventilation in removing contaminants Signup and view all the answers

What is the term for the device that measures airflow velocity in ventilation?

Rotating vane anemometer Signup and view all the answers

What is the purpose of calculating static pressure of the fan in ventilation?

To select the appropriate fan for the ventilation system Signup and view all the answers

What is the term for the device that removes contaminants from the air in ventilation?

Air-cleaning device Signup and view all the answers

What is the primary purpose of RPE-Designed Protective Systems?

To design and install protective systems in excavation Signup and view all the answers

What is the main purpose of Ground Fault Circuit Interrupters (GFCI's)

To prevent electrical shocks in construction Signup and view all the answers

What is the purpose of Bonding and Grounding in construction?

To prevent static electricity in construction Signup and view all the answers

What is the purpose of Safety Net Systems in fall protection?

To catch workers who fall from heights Signup and view all the answers

What is the purpose of Positioning Device Systems in fall protection?

To restrain workers from falling Signup and view all the answers

What is the purpose of Welding, Cutting, and Brazing safety procedures?

To prevent fires and explosions in welding and cutting operations Signup and view all the answers

What is the purpose of Ventilation and Protection in Welding, Cutting, and Heating operations?

To remove hazardous fumes and gases in welding, cutting, and heating operations Signup and view all the answers

What is the purpose of Housekeeping in construction?

To keep the work area clean and organized Signup and view all the answers

What is the law that relates the volume of a gas to its temperature?

Charles' Law Signup and view all the answers

What is the unit of measurement for the amount of a substance?

Mole Signup and view all the answers

What is the term for the percentage of an element in a compound by weight?

Atomic Weight Signup and view all the answers

What is the law that states that the volume of a gas is inversely proportional to the pressure?

Boyle's Law Signup and view all the answers

What is the term for a mixture of two or more substances in which each substance maintains its chemical properties?

Mixture Signup and view all the answers

What is the formula used to calculate the concentration of a vapor, gas, or particulate?

Concentration of Vapors, Gases, and Particulates Signup and view all the answers

What is the term for the minimum concentration of a flammable gas in air that will support combustion?

Lower Flammability Limit Signup and view all the answers

What is the standard unit of measurement for pressure?

Atmospheric Pressure Signup and view all the answers

What is the primary purpose of Ground Fault Circuit Interrupters?

To detect ground faults and interrupt the circuit Signup and view all the answers

What is the result of an overloaded circuit?

An electrical shock hazard Signup and view all the answers

What is the primary purpose of a series circuit?

To connect components in a single loop Signup and view all the answers

What is the formula to calculate power in a DC circuit?

P = V * I Signup and view all the answers

What is the primary purpose of a capacitor in a circuit?

To store electrical energy Signup and view all the answers

What is the primary purpose of an inductor in a circuit?

To resist changes in electrical current Signup and view all the answers

What is the primary purpose of a resistor in a circuit?

To convert electrical energy into heat energy Signup and view all the answers

What is the primary purpose of Ohm's Laws?

To calculate the values of voltage, current, and resistance Signup and view all the answers

What is the term used to describe the amount of substance that contains as many particles as there are atoms in 0.012 kilogram of carbon-12?

Mole Signup and view all the answers

What is the law that relates the volume of a gas to its temperature?

Charles' Law Signup and view all the answers

What is the term used to describe a mixture of two or more substances in which each substance maintains its chemical properties?

Mixture Signup and view all the answers

What is the formula used to calculate the concentration of a vapor, gas, or particulate?

C = m / V Signup and view all the answers

What is the term used to describe the minimum concentration of a flammable gas in air that will support combustion?

Lower Flammability Limit Signup and view all the answers

What is the standard unit of measurement for pressure?

Atmosphere Signup and view all the answers

What is the term used to describe the energy of a fluid due to its motion?

Kinetic energy Signup and view all the answers

What is the term used to describe the percentage of an element in a compound by weight?

Percentage composition Signup and view all the answers

What is the purpose of calculating static pressure, velocity pressure, and total pressure in ventilation?

To determine the fan's performance and duct system design Signup and view all the answers

What is the formula used to calculate the concentration of a contaminant with dilution ventilation?

C = Q / (V x E) Signup and view all the answers

What is the purpose of calculating purge rates in ventilation?

To determine the time required to remove a contaminant from a space Signup and view all the answers

What is the term used to describe the velocity of air at which a contaminant is captured by a hood?

Capture velocity Signup and view all the answers

What is the purpose of calculating room air changes in ventilation?

To determine the effectiveness of a ventilation system Signup and view all the answers

What is the term used to describe the pressure that drives airflow through a duct?

Static pressure Signup and view all the answers

What is the purpose of calculating hood entry losses in local exhaust ventilation?

To determine the energy losses in the hood Signup and view all the answers

What is the term used to describe the energy of a fluid due to its motion?

Velocity pressure Signup and view all the answers

What is the primary purpose of a Ground Fault Circuit Interrupter (GFCI)?

To interrupt ground faults Signup and view all the answers

What is the primary purpose of a Controlled Access Zone System in fall protection?

To restrict access to a hazardous area Signup and view all the answers

What is the primary purpose of a Safety Net System in fall protection?

To catch and arrest falls Signup and view all the answers

What is the primary purpose of a Personal Fall Arrest System in fall protection?

To arrest falls and bring the worker to a safe location Signup and view all the answers

What is the primary purpose of a Welding, Cutting, and Brazing safety procedure?

To prevent injuries and fires from occurring Signup and view all the answers

What is the primary purpose of Ventilation and Protection in Welding, Cutting, and Heating operations?

To remove contaminants from the air Signup and view all the answers

What is the primary purpose of Housekeeping in construction?

To keep the workspace clean and organized Signup and view all the answers

What is the primary purpose of Shoring in trenching?

To prevent cave-ins from occurring Signup and view all the answers

What is the purpose of calculating velocity head in a fluid flow system?

To determine the velocity of the fluid at a particular point Signup and view all the answers

Which of the following is a key concept in hydrostatics?

Hydrostatic Pressure Signup and view all the answers

What is the relationship between velocity and pressure in a fluid flow system, according to Bernoulli's Principle?

Velocity is inversely proportional to pressure Signup and view all the answers

What is the term used to describe the pressure that is exerted by a fluid due to its motion?

Velocity Pressure Signup and view all the answers

What is the purpose of calculating pressure loss due to friction in a pipe?

To optimize the design of the pipe Signup and view all the answers

What is the term used to describe the sum of the pressure and velocity heads?

Total Head Signup and view all the answers

Which of the following is a type of pressure that is exerted by a fluid at rest?

Hydrostatic Pressure Signup and view all the answers

What is the purpose of calculating flow rates in a fluid flow system?

To optimize the design of the system Signup and view all the answers

What is the primary purpose of Ground Fault Circuit Interrupters?

To prevent electrical shock Signup and view all the answers

What is the result of an overloaded circuit?

A fire or electrical shock Signup and view all the answers

What is the primary purpose of a series circuit?

To connect multiple devices in a single circuit Signup and view all the answers

What is the formula to calculate power in a DC circuit?

P = V x I Signup and view all the answers

What is the primary purpose of a capacitor in a circuit?

To store electrical energy Signup and view all the answers

What is the primary purpose of an inductor in a circuit?

To filter out AC currents Signup and view all the answers

What is the primary purpose of a resistor in a circuit?

To decrease current Signup and view all the answers

What is the primary purpose of Ohm's Laws?

To calculate current and resistance Signup and view all the answers

What is the primary purpose of assured equipment grounding conductor program?

To provide a safe path to ground for fault currents Signup and view all the answers

What is the purpose of a personal fall arrest system?

To arrest falls in progress Signup and view all the answers

What is the purpose of a controlled access zone system?

To control access to areas where fall hazards exist Signup and view all the answers

What is the purpose of a safety monitoring system?

To monitor the safety of workers Signup and view all the answers

What is the purpose of a warning line system?

To provide a visual warning of fall hazards Signup and view all the answers

What is the purpose of a safety net system?

To catch and absorb the force of a falling person Signup and view all the answers

What is the purpose of a crane and derrick safety program?

To provide a safe means of lifting and moving heavy loads Signup and view all the answers

What is the purpose of a welding, cutting, and brazing safety program?

To provide a safe means of joining and cutting metal Signup and view all the answers

What is the pressure exerted by a fluid due to its weight in a closed system?

Hydrostatic pressure Signup and view all the answers

Which law relates the velocity of a fluid to the pressure difference between two points?

Bernoulli's principle Signup and view all the answers

What is the term used to describe the pressure that is exerted by a fluid in motion?

Velocity pressure Signup and view all the answers

What is the formula used to calculate the pressure loss due to friction in a pipe?

P = L * D * * v^2 Signup and view all the answers

What is the term used to describe the sum of the pressure and velocity heads?

Total pressure Signup and view all the answers

Which law is used to relate the velocity of a fluid to the pressure difference between two points?

Bernoulli's principle Signup and view all the answers

What is the term used to describe the energy of a fluid due to its motion?

Kinetic energy Signup and view all the answers

What is the purpose of calculating flow rates and pressures in hydrostatics and hydraulics?

To design a piping system Signup and view all the answers

What is the term used to describe the concentration of a contaminant in the air that is calculated by dividing the total amount of the contaminant by the total volume of air?

Concentration by volume Signup and view all the answers

What is the formula used to calculate the percentage of an element in a compound by weight?

(% Element / Total) x 100 Signup and view all the answers

What is the term used to describe the minimum concentration of a flammable gas in air that will support combustion?

Lower Flammability Limit (LFL) Signup and view all the answers

What is the law that relates the volume of a gas to its temperature?

Charles' Law Signup and view all the answers

What is the term used to describe the amount of substance that contains as many particles as there are atoms in 0.012 kilogram of carbon-12?

Mole Signup and view all the answers

What is the formula used to calculate the concentration of a vapor, gas, or particulate?

Concentration = (Amount of Substance / Total Volume) x 100 Signup and view all the answers

What is the term used to describe the energy of a fluid due to its motion?

Kinetic Energy Signup and view all the answers

What is the standard unit of measurement for pressure?

Pascals (Pa) Signup and view all the answers

What is the purpose of calculating volumetric air flow in ventilation systems?

To determine the quantity of air required to dilute a contaminant Signup and view all the answers

What is the formula used to calculate the concentration of a contaminant with dilution ventilation?

C = (G / Q) x (1 - e^(-Qt/V)) Signup and view all the answers

What is the term used to describe the velocity of air flow at which a contaminant is captured by a hood?

Capture velocity Signup and view all the answers

What is the purpose of calculating room air changes in ventilation systems?

To determine the number of air changes per hour required to remove a contaminant Signup and view all the answers

What is the formula used to calculate the static pressure of a fan in ventilation systems?

SPh = P1 - P2 Signup and view all the answers

What is the purpose of calculating hood entry losses in local exhaust ventilation?

To determine the resistance to air flow into a hood Signup and view all the answers

What is the term used to describe the device that measures airflow velocity in ventilation systems?

Pitot tube Signup and view all the answers

What is the purpose of calculating purge rates in ventilation systems?

To determine the rate at which a contaminant is removed from a space Signup and view all the answers

What is the primary purpose of Ground Fault Circuit Interrupters (GFCI's)?

To detect and interrupt ground faults in electrical circuits Signup and view all the answers

What is the result of an overloaded circuit?

An increase in current and a risk of electrical fire or explosion Signup and view all the answers

What is the formula to calculate power in a DC circuit?

P = V * I Signup and view all the answers

What is the primary purpose of a capacitor in a circuit?

To store energy in the form of electric fields Signup and view all the answers

What is the primary purpose of an inductor in a circuit?

To store energy in the form of magnetic fields Signup and view all the answers

What is the primary purpose of a resistor in a circuit?

To control the flow of electric current in a circuit Signup and view all the answers

What is the primary purpose of Ohm's Laws?

To relate voltage, current, and resistance in a circuit Signup and view all the answers

What is the formula to calculate the total resistance of a series circuit?

R_total = R1 + R2 + ... + Rn Signup and view all the answers

Study Notes

Excavation and Trenching Safety

Soil classifications are crucial in excavation and trenching safety
Protective systems include sloping, shoring, shields (trench boxes), and RPE-designed protective systems
Safe entry and exit from trenches are critical to prevent accidents

Electrical Safety in Construction

Electrical definitions include electrical shock, burns, and falls
Controlling electrical hazards involves identifying exposed electrical parts, overhead power lines, inadequate wiring, defective or damaged cords and wires, and ensuring proper grounding
Ground fault circuit interrupters and assured equipment grounding conductor programs are essential in preventing electrical shock
Overloaded circuits and safety-related work practices must be monitored and controlled

Static Electricity

Bonding and grounding are crucial in preventing static electricity
Humidification, static controllers (collectors), and additives are used to control static electricity

Scaffolds

Fall hazards are a significant risk in scaffolding
Falling object (struck by) protection must be ensured
Elements of safe scaffold construction include proper training, planning, and equipment

Fall Protection and Prevention in Construction

Physics of a fall involves understanding the forces involved in a fall
Fall prevention and protection include guardrails, positioning device systems, warning line systems, controlled access zone systems, safety monitoring systems, personal fall arrest systems, and safety net systems

Cranes and Derrick Safety

Cranes and derrick safety regulations are outlined in 29 CFR 1926.550
Proper training, planning, and equipment are essential in crane and derrick operations

Welding, Cutting, and Brazing Safety

Oxygen-fuel gas welding and cutting safety regulations are outlined in 29 CFR 1926.350-353
Fuel gas and oxygen manifolds, hoses, torches, regulators, and gauges must be properly maintained and used
Electrical safety in welding, cutting, and brazing is crucial
Fire prevention, ventilation, and protection in welding, cutting, and heating are essential

Ventilation

Purpose of ventilation is to remove contaminants from the air
Types of ventilation include general ventilation, dilution ventilation, and local (exhaust) ventilation
General concepts of ventilation include calculating volumetric air flow, static pressure, velocity pressure, and total pressure
Local exhaust ventilation uses canopies, down draft hoods, enclosures, and receiving hoods

Water Properties

Hydrostatic pressure is calculated using Torricelli's law
Head pressure, velocity head, and velocity pressure at constant laminar velocity are important concepts in hydraulics
Flow rates and pressure drops must be calculated to ensure proper hydraulic system design

Particulates and Gases

Atomic number, atomic mass, and chemical bonding are essential concepts in understanding particulates and gases
Moles, molecules, and compounds are used to calculate concentrations of vapors, gases, and particulates
Gas laws, including Boyle's law, Charles' law, and the ideal gas law, are used to calculate concentrations and volumes of gases
Time-weighted average and standard temperature and pressure are essential concepts in calculating concentrations of particulates and gases### Electricity Basics
Voltage, current, and resistance are the three fundamental concepts in electricity

Series and Parallel Circuits

Series circuits have components connected one after the other, forming a single loop
Parallel circuits have components connected between the same two points, forming multiple loops

Direct and Alternating Currents

Direct currents (DC) flow in one direction only
Alternating currents (AC) flow in one direction, then reverse direction, repeating continuously

Calculating Values (Ohm's Laws)

Calculating voltage, current, and resistance in DC and AC circuits
Formulas: V=IR, I=V/R, R=V/I, P=IV, P=V^2/R, P=I^2*R

Resistors

Calculating resistance in series and parallel circuits
Formulas: R_total = R1 + R2 + ..., 1/R_total = 1/R1 + 1/R2 + ...

Capacitors

Calculating capacitance in series and parallel circuits
Formulas: C_total = C1*C2 / (C1 + C2), C_total = C1 + C2 + ...

Inductors

Calculating inductance in series and parallel circuits
Formulas: L_total = L1 + L2 + ..., 1/L_total = 1/L1 + 1/L2 + ...

Electrical Shock Hazard

Burns caused by electricity: electrical shock, arc blasts, electrical fires
Controlling electrical hazards: exposed electrical parts, overhead power lines, inadequate wiring, defective cords and wires

Planning and training to prevent electrical hazards
Importance of grounding, assured equipment grounding conductor program, and ground fault circuit interrupters

Excavation and Trenching Safety

Soil classifications are crucial in excavation and trenching safety
Protective systems include sloping, shoring, shields (trench boxes), and RPE-designed protective systems
Safe entry and exit from trenches are critical to prevent accidents

Electrical Safety in Construction

Electrical definitions include electrical shock, burns, and falls
Controlling electrical hazards involves identifying exposed electrical parts, overhead power lines, inadequate wiring, defective or damaged cords and wires, and ensuring proper grounding
Ground fault circuit interrupters and assured equipment grounding conductor programs are essential in preventing electrical shock
Overloaded circuits and safety-related work practices must be monitored and controlled

Static Electricity

Bonding and grounding are crucial in preventing static electricity
Humidification, static controllers (collectors), and additives are used to control static electricity

Scaffolds

Fall hazards are a significant risk in scaffolding
Falling object (struck by) protection must be ensured
Elements of safe scaffold construction include proper training, planning, and equipment

Fall Protection and Prevention in Construction

Physics of a fall involves understanding the forces involved in a fall
Fall prevention and protection include guardrails, positioning device systems, warning line systems, controlled access zone systems, safety monitoring systems, personal fall arrest systems, and safety net systems

Cranes and Derrick Safety

Cranes and derrick safety regulations are outlined in 29 CFR 1926.550
Proper training, planning, and equipment are essential in crane and derrick operations

Welding, Cutting, and Brazing Safety

Oxygen-fuel gas welding and cutting safety regulations are outlined in 29 CFR 1926.350-353
Fuel gas and oxygen manifolds, hoses, torches, regulators, and gauges must be properly maintained and used
Electrical safety in welding, cutting, and brazing is crucial
Fire prevention, ventilation, and protection in welding, cutting, and heating are essential

Ventilation

Purpose of ventilation is to remove contaminants from the air
Types of ventilation include general ventilation, dilution ventilation, and local (exhaust) ventilation
General concepts of ventilation include calculating volumetric air flow, static pressure, velocity pressure, and total pressure
Local exhaust ventilation uses canopies, down draft hoods, enclosures, and receiving hoods

Water Properties

Hydrostatic pressure is calculated using Torricelli's law
Head pressure, velocity head, and velocity pressure at constant laminar velocity are important concepts in hydraulics
Flow rates and pressure drops must be calculated to ensure proper hydraulic system design

Particulates and Gases

Atomic number, atomic mass, and chemical bonding are essential concepts in understanding particulates and gases
Moles, molecules, and compounds are used to calculate concentrations of vapors, gases, and particulates
Gas laws, including Boyle's law, Charles' law, and the ideal gas law, are used to calculate concentrations and volumes of gases
Time-weighted average and standard temperature and pressure are essential concepts in calculating concentrations of particulates and gases### Electricity Basics
Voltage, current, and resistance are the three fundamental concepts in electricity

Series and Parallel Circuits

Series circuits have components connected one after the other, forming a single loop
Parallel circuits have components connected between the same two points, forming multiple loops

Direct and Alternating Currents

Direct currents (DC) flow in one direction only
Alternating currents (AC) flow in one direction, then reverse direction, repeating continuously

Calculating Values (Ohm's Laws)

Calculating voltage, current, and resistance in DC and AC circuits
Formulas: V=IR, I=V/R, R=V/I, P=IV, P=V^2/R, P=I^2*R

Resistors

Calculating resistance in series and parallel circuits
Formulas: R_total = R1 + R2 + ..., 1/R_total = 1/R1 + 1/R2 + ...

Capacitors

Calculating capacitance in series and parallel circuits
Formulas: C_total = C1*C2 / (C1 + C2), C_total = C1 + C2 + ...

Inductors

Calculating inductance in series and parallel circuits
Formulas: L_total = L1 + L2 + ..., 1/L_total = 1/L1 + 1/L2 + ...

Electrical Shock Hazard

Burns caused by electricity: electrical shock, arc blasts, electrical fires
Controlling electrical hazards: exposed electrical parts, overhead power lines, inadequate wiring, defective cords and wires

Planning and training to prevent electrical hazards
Importance of grounding, assured equipment grounding conductor program, and ground fault circuit interrupters

Excavation and Trenching Safety

Soil classifications are crucial in excavation and trenching safety
Protective systems include sloping, shoring, shields (trench boxes), and RPE-designed protective systems
Safe entry and exit from trenches are critical to prevent accidents

Electrical Safety in Construction

Electrical definitions include electrical shock, burns, and falls
Controlling electrical hazards involves identifying exposed electrical parts, overhead power lines, inadequate wiring, defective or damaged cords and wires, and ensuring proper grounding
Ground fault circuit interrupters and assured equipment grounding conductor programs are essential in preventing electrical shock
Overloaded circuits and safety-related work practices must be monitored and controlled

Static Electricity

Bonding and grounding are crucial in preventing static electricity
Humidification, static controllers (collectors), and additives are used to control static electricity

Scaffolds

Fall hazards are a significant risk in scaffolding
Falling object (struck by) protection must be ensured
Elements of safe scaffold construction include proper training, planning, and equipment

Fall Protection and Prevention in Construction

Physics of a fall involves understanding the forces involved in a fall
Fall prevention and protection include guardrails, positioning device systems, warning line systems, controlled access zone systems, safety monitoring systems, personal fall arrest systems, and safety net systems

Cranes and Derrick Safety

Cranes and derrick safety regulations are outlined in 29 CFR 1926.550
Proper training, planning, and equipment are essential in crane and derrick operations

Welding, Cutting, and Brazing Safety

Oxygen-fuel gas welding and cutting safety regulations are outlined in 29 CFR 1926.350-353
Fuel gas and oxygen manifolds, hoses, torches, regulators, and gauges must be properly maintained and used
Electrical safety in welding, cutting, and brazing is crucial
Fire prevention, ventilation, and protection in welding, cutting, and heating are essential

Ventilation

Purpose of ventilation is to remove contaminants from the air
Types of ventilation include general ventilation, dilution ventilation, and local (exhaust) ventilation
General concepts of ventilation include calculating volumetric air flow, static pressure, velocity pressure, and total pressure
Local exhaust ventilation uses canopies, down draft hoods, enclosures, and receiving hoods

Water Properties

Hydrostatic pressure is calculated using Torricelli's law
Head pressure, velocity head, and velocity pressure at constant laminar velocity are important concepts in hydraulics
Flow rates and pressure drops must be calculated to ensure proper hydraulic system design

Particulates and Gases

Atomic number, atomic mass, and chemical bonding are essential concepts in understanding particulates and gases
Moles, molecules, and compounds are used to calculate concentrations of vapors, gases, and particulates
Gas laws, including Boyle's law, Charles' law, and the ideal gas law, are used to calculate concentrations and volumes of gases
Time-weighted average and standard temperature and pressure are essential concepts in calculating concentrations of particulates and gases### Electricity Basics
Voltage, current, and resistance are the three fundamental concepts in electricity

Series and Parallel Circuits

Series circuits have components connected one after the other, forming a single loop
Parallel circuits have components connected between the same two points, forming multiple loops

Direct and Alternating Currents

Direct currents (DC) flow in one direction only
Alternating currents (AC) flow in one direction, then reverse direction, repeating continuously

Calculating Values (Ohm's Laws)

Calculating voltage, current, and resistance in DC and AC circuits
Formulas: V=IR, I=V/R, R=V/I, P=IV, P=V^2/R, P=I^2*R

Resistors

Calculating resistance in series and parallel circuits
Formulas: R_total = R1 + R2 + ..., 1/R_total = 1/R1 + 1/R2 + ...

Capacitors

Calculating capacitance in series and parallel circuits
Formulas: C_total = C1*C2 / (C1 + C2), C_total = C1 + C2 + ...

Inductors

Calculating inductance in series and parallel circuits
Formulas: L_total = L1 + L2 + ..., 1/L_total = 1/L1 + 1/L2 + ...

Electrical Shock Hazard

Burns caused by electricity: electrical shock, arc blasts, electrical fires
Controlling electrical hazards: exposed electrical parts, overhead power lines, inadequate wiring, defective cords and wires

Planning and training to prevent electrical hazards
Importance of grounding, assured equipment grounding conductor program, and ground fault circuit interrupters

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Description

This quiz covers the concepts of soil excavation, classification, and protective systems including sloping and shoring. Test your knowledge on soil mechanics and excavation techniques.