Exam

Question 1

An apparatus for ascertaining and exhibiting in
some suitable manner the magnitude (size) of a physical quantity or condition
presented to it.

Answer 1

Measuring instrument

Question 2

The pointer, light spot, liquid surface, recording pen or other means, by
the position of which, in relation to the instrument scale or chart, the value of the
measured quantity or the point of balance of a null-point instrument is indicated

Answer 2

Index

Question 3

On an indicating instrument, the array-marks, together with any
associated figuring, in relation to which the index is observed.

Answer 3

Scale

Question 4

One of the marks constituting a scale

Answer 4

Scale marks

Question 5

A part of a scale delimited by two adjacent scale marks

Answer 5

Scale division

Question 6

The process of setting out a scale with a series of marks

Answer 6

Graduation

Question 7

The process of determining the characteristics relation between
the value of the physical quantity applied to the instrument and the corresponding
position of the index

Answer 7

Calibration

Question 8

The sensitivity of an instrument at any indicated value is the
relation between the movement of the index and the change in the measured
quantity that produces it

Answer 8

Sensitivity

Question 9

The smallest change in the quantity
measured which produces a perceptible movement of the index

Answer 9

DISCRIMINATION OF SENSITIVENESS

Question 10

The reproducibility of mean readings of an instrument when
a series of test is carried out in a short interval of time fixed condition of use.

Answer 10

Repeatability

Question 11

The reproducibility of mean readings of an instrument when tested
under defined conditions of use, repeated on different occasions separated by
intervals of time which are long compared to the time of taking a reading.

Answer 11

Stability

Question 12

A general term describing the degree of closeness with the
indications of an instrument approach the true value of the quantities being
measured.

Answer 12

Accuracy

Question 13

The difference obtained by subtracting the true value of
the quantity measured from the indicated value, due regard being paid to the sign
of each.

Answer 13

Indication error

Question 14

The amount which should be added to the indicated value, due
regard being paid to the sign, to obtain the true value of the quantity measured

Answer 14

Correction

Question 15

A source of error that occurs when the line joining the eye and the
index is not normal to the face of the scale of the instrument. It makes the indicated
value greater or lesser than the true value of the quantity being measured

Answer 15

Parralax

Question 16

The term used for the pressure between the face of the measuring
instrument contact and the surface to which the contact is applied

Answer 16

Feel