intro to test instruments Flashcards
All other units of measure are defined and compared to the four basic measurements of length, ?
weight,time,temp
The Romans refined distance traveled to a unit of length called the ?
mile
Mass is used as a standard instead of weight.
true
Weight is often used as a standard because it is universally constant, regardless of latitude.
false
The metric system adopted the ? as the standard unit of time measurement.
second
The absolute zero scale of centigrade is often called the ?
kelvin
The signal word used to indicate a potentially hazardous situation that could result in death or serious injury is the ?
warning
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.
true rms
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.
autoranging
Digital test instruments are less susceptible to noise than analog test instruments.
false
Analog test instruments are less accurate than digital test instruments.
true
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.
NFPA 70E
? are an eye protection device with special impact-resistant glass or plastic lenses.
safety glasses
An arc ? is an explosion that occurs when the air surrounding electrical equipment becomes ionized and conductive.
blast
Electricity is the number one cause of fires.
true
