Exam 12: Basic Electricity and Magnetism

What is meant by 60 hertz AC current?

(Essay)

4.8/5

(81)

Question 41

In a circuit with two or more resistances in parallel, the total resistance in the circuit is the sum of the resistances in the circuit.

(True/False)

4.9/5

(85)

Question 42

What is the total current in a circuit that has two electric heating elements that have resistances of 5 Ω and 20 Ω? The elements are connected in parallel with each other and are connected to a 200-V power supply .

(Short Answer)

4.9/5

(78)

Question 43

What happens to the current in a circuit if the resistance is increased?

(Multiple Choice)

4.8/5

(79)

Question 44

If there was a current flow of 6 A in a 120-V circuit, the resistance of the circuit would be ____________________ Ω .

(Short Answer)

4.8/5

(85)

Question 45

In a circuit with two or more resistances in series, the total resistance in the circuit is the sum of the resistances.

(True/False)

4.9/5

(68)

Question 46

Showing 41 - 46 of 46

Exam 12: Basic Electricity and Magnetism

What is meant by 60 hertz AC current?

In a circuit with two or more resistances in parallel, the total resistance in the circuit is the sum of the resistances in the circuit.

What is the total current in a circuit that has two electric heating elements that have resistances of 5 Ω and 20 Ω? The elements are connected in parallel with each other and are connected to a 200-V power supply .

What happens to the current in a circuit if the resistance is increased?

If there was a current flow of 6 A in a 120-V circuit, the resistance of the circuit would be ____________________ Ω .

In a circuit with two or more resistances in series, the total resistance in the circuit is the sum of the resistances.

Heat and Pressure

Matter and Energy

Refrigeration and Refrigerants

General Safety Practices

Tools and Equipment

Fasteners

Tubing and Piping

Leak Detection, System Evacuation and System Clean-Up

Refrigerant and Oil Chemistry and Managementrecovery, Recycling, Reclaiming, and Retrofitting

System Charging

Calibrating Instruments

Introduction to Automatic Controls

Automatic Control Components and Applications

Troubleshooting Basic Controls

Advanced Automatic Controlsdirect Digital Controls Ddc and Pneumatics

Types of Electric Motors

Application of Motors

Motor Controls

Troubleshooting Electric Motors

Evaporators and the Refrigeration System

Condensers

Compressors

Expansion Devices

Special Refrigeration System Components

Application of Refrigeration Systems

Commercial Ice Machines

Special Refrigeration Applications

Troubleshooting and Typical Operating Conditions for Commercial Refrigeration

Electric Heat

Gas Heat

Oil Heat

Hydronic Heat

Indoor Air Quality

Comfort and Psychrometrics

Refrigeration Applied to Air Conditioning

Air Distribution and Balance

Installation

Residential Energy Auditing

Typical Operating Conditions

Troubleshooting

Heat Gain and Heat Loss in Buildings

Air Source Heat Pumps

Geothermal Heat Pumps

Domestic Refrigerators and Freezers

Room Air Conditioners

High-Pressure, Low-Pressure, and Absorption Chilled-Water Systems

Cooling Towers and Pumps

Operation, Maintenance, and Troubleshooting of Chilled-Water Air Conditioning Systems

Commercial Rooftop, Packaged, Variable Refrigerant Flow, and Variable Air Volume Systems

Filters