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Reviewer > L1 > Flashcards

L1 Flashcards

1
Q

Over the last century and a half, art of measuring electrical quantities

A

Analog

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2
Q

The principal effort was aimed at deflection-type instrument with a scale and movable pointer.

A

Analog

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3
Q

The angle of deflection of the pointer is function of, and is therefore analogous to, the value of the electrical quantity being measured.

A

Analog

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4
Q

instrument was coined to identify deflection-type instruments and to distinguish these from totally different instruments, display in decimal (digital) from the value of the quantity being measured.

A

Analog

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5
Q

display in decimal (digital) from the value of the quantity being measured.

A

Digital instrument

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6
Q

newer instruments.

A

Digital instrument

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7
Q

Common purposes in supplying information about some variable quantity
that is to be measured.

A

Instrument

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8
Q

What function supplies information about some variable quantity
that is to be measured.

A

Indicating

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9
Q

Provides visual indication of the quantity

A

Instrument

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10
Q

Furnishes a permanent record.

A

Instrument

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11
Q

What function furnishes permanent record

A

Recording

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12
Q

Used to control quantity.

A

Instrument

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13
Q

What function is used to control quantity

A

Controlling

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14
Q

3 basic function

A

Indicating
Recording
Controlling

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15
Q

These entire system is called a

A

Control or automated system

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16
Q

What type of instrument uses the function of recording, and indicating?

A

General instrument

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17
Q

What type of instrument uses the function of controlling ?

A

Industrial instrument

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18
Q

What type of instrument is used to measure solution conductivity

A

Current sensitive devise

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19
Q

increase the signal of
the quantity being measured.

A

Electronic instrument that contains amplifying circuit

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20
Q

measure current, voltage, resistance, pressure, temperature, sound level or any other physical quantities.

A

Eletronic instrument

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21
Q

are more expensive than a simple electrical instrument, but they offer significant advantages for measurement purposes. It has higher sensitivity rating because it utilized electronic amplifiers.

A

Electronic instrument

22
Q

What instrument has the ability to monitor remote signal

A

Electronic instrument

23
Q

defined by international and maintained at Bureau of Weight and Measures in Paris.

A

International standard

24
Q

represent certain units of measurement to the closest possible accuracy attainable by the science and technology of measurement.

A

International standard

25
Q

-it applies at National Standards laboratories in different countries.

A

Primary standard

26
Q

The National Bureau of Standards (NBS) is responsible for maintaining the primary standards are not available for use outside the national laboratories.

A

Primary standard

27
Q

Their principal function is calibration and verification of secondary standards

A

Primary standard

28
Q

are basic reference standards used by measurement and calibration laboratories in the industry to which they belong.

A

Secondary standard

29
Q

Each of the laboratory is responsible to its own ?

A

Secondary standard

30
Q

After the calibration the _________ _______ are returned to the industrial laboratory with a certification of measuring accuracy in terms of primary standard.

A

Secondary standard

31
Q

are the principal tools of the measurements laboratory.

A

Working standard

32
Q

They are used to check and calibrate the instruments used in the laboratory in the laboratory or to make comparison measurements in industrial application.

A

Working standard

33
Q

convert non-electrical signals into electrical signal.

A

Transducer sensor

34
Q

are required only if the quantity being measured is non-electrical signal such as pressure or temperature.

A

Transducer sensor

35
Q

is required to process the incoming electrical signal to make it suitable for application to the indicating device.

A

Signal modifier

36
Q

The signal may need to be amplified until it is of significant amplitude to cause change at the indicating device

A

Signal modifier

37
Q

is a modifier design to reduce the strength of signal applied at the indicating device.

A

Voltage divider

38
Q

Wave-shaping circuits such as rectifiers, filters and choppers are also used as modifiers

A

Signal modifier

39
Q

are deflection type meter for such general-purpose instruments such as voltmeters, current meters or choppers

A

Indicating devise

40
Q

is the process of comparing an unknown quantity with an accepted
standard quantity.

A

Measurement

41
Q

It involves connecting a measuring instrument into the system under consideration and observing the resulting response on the instrument.

A

Measurement

42
Q

The measurement thus obtained is quantitative measure of the so-called

A

True value

43
Q

is used as a term for most the measurements because true-value is very difficult to define.

A

Expected value

44
Q

are always made nearest to something whether it is stated or not, ______ is never exact.

A

Measurement

45
Q

The degree to which a measurement conforms to the expected value

A

Error in measurement

46
Q

Errors can be express either as

A

Absolute error / per cent of error

47
Q

can be defined as the difference between the expected value and the measured value.

A

Absolute error

48
Q

is considered to be one half of the smallest measuring unit.

A

Greatest possible error

49
Q

Machines used in manufacturing often set “_______”, or “______ _____,” or “_____” in which product measurements will be tolerated or accepted before they are considered flawed.

A

Margin of error
Tolerance
Range

50
Q

Any measurements within this range are “tolerated” or perceived as correct. This is also known as

A

Tolerance range

51
Q

Any measurements within this range are “tolerated” or perceived as correct. This is also known as

A

Tolerance range

Reviewer (6 decks)

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