Lesson 1: Introduction to test instruments

Clothing made of synthetic materials, such as rayon, is the only type to be worn when working with energized electrical circuits.

False

Digital test instruments are less susceptible to noise than analog test instruments.

False

Extra care must be provided to digital test instruments because their movements are susceptible to damage from shock.

False

Grounding is the connection of all exposed, noncurrent-carrying metal parts to the neutral conductor.

False

Weight is often used as a standard because it is universally constant, regardless of latitude.

False

Always ensure that the jack position of the test leads corresponds to the setting of the meter function and selector switch before taking a measurement.

True

Analog test instruments are less accurate than digital test instruments.

True

Electricity is the number one cause of fires.

True

Mass is used as a standard instead of weight.

True

The main reason for the increase in the use of digital electronic technology is for greater measuring capability.

True

The primary purpose of rubber insulating gloves is to insulate the hands and lower arms from possible contact with live conductors.

True

The resistance of test leads must be less than ? . a. 1 Ω b. 5 Ω c. 10 Ω d. 20 Ω

a. 1Ω

The ? feature on a digital multimeter allows a meter to automatically adjust to a higher range setting if the set range is not high enough for the application. a. Autoranging b. Hold c. MIN MAX d. Relative

a. auto ranging

An arc ? is an explosion that occurs when the air surrounding electrical equipment becomes ionized and conductive. a. blast b. discharge c. flash d. gap

a. blast

An arc flash is an extremely high-temperature ? produced by an electrical fault in the air. a. discharge b. phenomenon c. scattering of electrons d. short

a. discharge

For maximum safety, personal protective equipment and safety requirements for test instrument procedures must be followed, as specified in ? , which is one of several standards. a. IEEE b. NFPA 70E c. OSHA Standard 1926.05 d. test instrument manufacturer's guidelines

b. NFPA 70E

? is the process of removing the source of electrical power and installing a lock that prevents the power from being turned on. a. Grounding b. Lockout c. Shut down d. Tagout

b. lockout

Lockout/Tagout is normally removed by the ? , unless the situation is an emergency. a. crew foreman b. person who installed it c. plant manager d. system operator

b. person who installed it

The life expectancy of a test instrument depends on ? . a. how many times it has been calibrated b. the care of the meter c. the current it has to carry d. the voltage it measures

b. the are of the meter

When using a test instrument with test leads, the ? lead should be connected first. a. energized b. fused c. ground d. red

c. ground

The absolute zero scale of centigrade is often called the ? . a. centigrade b. Fahrenheit c. Kelvin d. true temperature

c. kelvin

? are an eye protection device with special impact-resistant glass or plastic lenses. a. Eye glasses b. Full face dust masks c. Safety glasses d. Welding hoods

c. saftey glasses

The ? is a federal act that requires all employers to provide a safe environment for employees. a. CSA b. ISO c. NFPA d. OSHA Act

d. OSHA Act

The Romans refined distance traveled to a unit of length called the ? . a. cubit b. foot c. meter d. mile

d. mile

Never touch any part of an electrical shock victim's body when it is in contact with the circuit. When the circuit cannot be turned off, use any ? device to free the victim. a. conducting b. electrical c. grounded d. nonconducting

d. nonconducting

The metric system adopted the ? as the standard unit of time measurement. a. degree b. hour c. minute d. second

d. second

Only a meter marked ? can be used when taking a measurement on a circuit that includes solid-state components that distort the shape of AC sine waves. a. AC b. analog c. Min Max d. True RMS

d. true RMS

The signal word used to indicate a potentially hazardous situation that could result in death or serious injury is the ? . a. caution b. danger c. stop d. warning

d. warning

Both Fahrenheit and Celsius thermometers have scales based on the freezing and boiling points of ? . a. alcohol b. mercury c. oil d. water

d. water

All other units of measure are defined and compared to the four basic measurements of length, ? . a. height, weight, and temperature b. height, width, and weight c. weight, consistency, and viscosity d. weight, time, and temperature

d. weight, time, and temperature