1091. The minimum value of input which is necessary to cause a detectable change from zero output is called :

A. Least count
B. Resolution
C. threshold *
D. Drift

1092.The resolution of a system refers to :

A. Retardation of the response
B. Distinction between the valid and estimated worth of the cycle variable
C. Smallest change of input for which there will be a change of output *
D. Minimum value of input which is necessary to cause a detectable change from zero output .

1093. State which one of the following describes the linearity of an instrument ?

A. range of errors that are acceptable
B. Closeness of the calibration curve to a specified straight line *
C. Largest change in the measured variable which produces no instrument response
D. Undesired gradual departure of instrument output over a long period of time

1094. The largest change in the measured variable which produces no instrument response is called :

A. Dead Band *
B. Dynamic error
C. Fidelity
D. Threshold

1095. Precision is the :

A. Closeness of the instrument output to true value of the measured quantity
B. Difference between measured value and true value of the measurand
C. Smallest increment in measurand that can be detected with certainty by the instrument
D. Degree of repeatability of several independent measurements of the desired input at the same reference condition *

1096. Which of the following is a false statement ?

A. The error specification as percentage of full scale deflection is more accurate than that as percentage of true value *
B. The sensitivity has wide range of units depending upon the instrument or measurement system used
C. The linearity represents the closeness of the calibration curve to a specified straight line
D. The magnitude of output for a given input depends upon the direction of the change of input

1097. The minimum change in the measured variable which produces an effective response of the instrument is known as :

A. Deviation
B. Drift
C. Resolution *
D. Deal zone

1098. A reliable instrument :

A. Provides results that can be replicated within certain limits *
B. Has good frequency response
C. Has errors of same size and sign under the same working conditions
D. Gives linear characteristics within the entire range

1099. The dead time of an instrument refers to :

A. Large change of input quantity for which there is not output
B. The time encountered when the instrument has to wait for some reaction to take place
C. The period of time before the instrument begins to respond to changes in the quantity *
D. Hindrance or defer in the reaction of an instrument to an adjustment of the information signal

1100. A step- input signal :

A. Starts from zero and rises uniformly with time
B. Changes rapidly with time
C. Starts from zero, rises to a particular value and returns back to zero
D. Starts from zero and rises to a particular value in zero time *