Chapter 3 HVAC Level 1

Réussis tes devoirs et examens dès maintenant avec Quizwiz!

2 circuits

A DPDT switch can control ________

Multimeter

A _____ is a test meter able to read voltage, current, and resistance

DC Voltage

A battery is a common source of _____

Ohmmeter

A continuity tester operates like an

Motor starter

A control device that opens a motor control circuit, which in turn opens a motor power circuit, is known as a ______ device

Solenoid coil

A device that acts as an electromagnet to open or close a valve is a ______

Rectifier

A device that converts AC voltage into DC voltage is a ______

Transformer

A device with two or more coils of wire wrapped around a common core is a _______

Slow blow fuse

A fuse with a time delay is known aas a _____

Pilot duty

A magnetic switching device that usually has overload protection and is used to control the power to motors is a _______

Relay

A magnetically operated switching device used in low current circuits is the _____

Conductor

A material that readily carries electricity is a _____

Analog meter

A meter that uses a needle to indicate a value is _______

Thermistor

A semiconductor device that changes resistance as the result of a change in temperature is called a _____

Raise and lower voltage

A transformer is used to ________

Insulator

An _____ is a material that impedes the flow of current. It is the opposite of a conductor

Ammeter

An _____ is used to measure current

Load

An electrical device that converts electrical energy from one form to another, such as heat or motion, is called a _____

Solenoid coil

An electromagnetic coil used to open or otherwise move a mechanical device is called a ________

Continuity

An unbroken circuit path has _____

Volt ohm meter

Another name for a multimeter is ______

240 Volts

Central air conditioning systems in homes generally require a power source of _______

Amperes

Current is measured in _______

Watts

Electrical power consumption is measured in _______

Voltage

Electromotive force is another name for _______

How much current they can withstand

Fuses are rated on the basis of ______

12.5A

How much current is drawn by a 120V circuit containing a 1,500W load?

0.8A

How much current will be drawn by a 120V series circuit containing a 100 ohm and a 50 ohm load?

324W

How much power is consumed by a 120V parallel circuit that contains a 100 ohm load and an 80 ohm load and draws 2.7A?

2160 watts

How much power is consumed by a circuit with a 120V source that draws 18A through a resistive load?

Parallel circuit

If a circuit containing five 50-ohm resistors has a total resistance of 10 ohms, the circuit is a ______

AC

If the electricity changes direction on a cyclical basis, it is known as ______

Parallel

In which type of circuit will a voltmeter read the same voltage when it is placed across the different loads?

1/1000th of an amp

One milliamp is equal to _______

An inaccurate reading

Placing the jaws of a clamp-on ammeter around two separate conductors will result in _______

Direct current

Resistance in a DC circuit is measured in _____

Ampere

The _____ is the unit of measure for current flow in an electrical circuit

Power

The amount of electrical energy used by an electrical load device is called ______

Wiring diagram

The colors of the wires in an electrical circuit are usually shown on the ______

Clampon meter

The device used to sense current using jaws that are clamped around a conductor is the _____

Voltage

The force that causes electrons to flow is most commonly called ______

Contactor

The magnetic control device used for switching higher-current circuits is the ______

Resistance

The opposition to the flow of electricity is called ______

The amount of current that flows through the body

The outcome of electrical shock is based on ________

Explain the abbreviations used on the diagram

The purpose of a legend on a circuit diagram is to _____

Current

The rate at which electrons flow in a circuit is known as _____

Inline ammeter

The type of ammeter that is placed in series with the load is the ______

Inductive

The type of electrical devices that draw significantly more current on startup or when first energized are those that are _______

Ladder diagram

The type of electrical diagram in which the loads are arranged between vertical lines is known as a ________

Volt

The unit of measurement for voltage is the _____

Extreme pain and possible death

The worst effect a current of 150 mA is likely to have on the human body is _____

They usually require more current when they operate

What characteristic do devices that use DC instead of AC power often have in common?

Electromagnet

When a current flows through a coil of wire wrapped around an iron core, a _____ can be created

Line Duty

When a protective device is in series with the load, it is known as a _________ device

Short circuit

When the current flow bypasses a load, it is called a _______

Electric heater

Which of these components is considered a load?

True

Wrapping a conductor several times around the jaws of the ammeter multiplies the current by the number of wraps.


Ensembles d'études connexes

Linux Ch. 27 Controlling Versions with Git

View Set

19 Family-Centered Care of the Child

View Set

ADDING AND SUBTRACTING POLYNOMIALS

View Set

CFP Class 2 - Module 2 - Investment Risk & Return

View Set

Lecture 9.2: Racial Bias & Prejudice

View Set

Psychology 430 Final Exam Ch. 10-13 and community

View Set

CHAPTER 16: Regulation of Gene Expression in Bacteria

View Set

Pharmacology Final: NCLEX style practice questions

View Set

Blood Gas electrode and quality assurance

View Set

CFP Class 2 - Module 3 - Modern Portfolio Theory and Behavioral Finance

View Set

Chapter 6 Computer Science Quiz-AB

View Set