WorksheetsMeasurement and Instrumentation MCQs
Total questions: 40
Worksheet time: 20mins
The process of comparing an unknown quantity with a known standard is called:
Precision
Calibration
Measurement
Sensitivity
The smallest change in input that brings a detectable change in output is known as:
Accuracy
Resolution
Threshold
Hysteresis
Which term defines closeness of agreement between a measured value and the true value?
Precision
Accuracy
Repeatability
Sensitivity
The ability of a measuring instrument to reproduce the same reading under identical conditions is:
Precision
Accuracy
Linearity
Repeatability
An error caused due to the instrument itself is:
Systematic error
Random error
Gross error
Personal error
Sensitivity is defined as:
Output/Input
ΔOutput/ΔInput
True value/Measured value
Measured value - error
Hysteresis is the difference in readings caused by:
Temperature
Direction of approach
Human error
Calibration
Which statistical term gives the measure of data spread?
Mean
Standard deviation
Mode
Median
Best estimate of true value is obtained by:
Maximum reading
Minimum reading
Average of all readings
First reading
System response time indicates:
Precision
Time delay
Resolution
Calibration
Dynamic characteristics become important when:
Input is constant
Input varies with time
Calibration is complete
Instrument is static
A first-order system is represented by:
One energy storage element
Two energy storage elements
No energy storage element
Multiple nonlinearities
A sudden change in input quantity is known as:
Ramp input
Step input
Sinusoidal input
The ratio of output amplitude to input amplitude in steady state is called:
Damping
Sensitivity
Frequency response
Transfer function
Speed of response is measured by:
Rise time
Time delay
Standard deviation
Linearity
The steady-state error for a step input in a first-order system:
Zero
Maximum
Infinite
Constant
The response to an impulse input is:
Sudden finite jump
Zero
Gradual increase
Exponential decay
Dynamic error is the difference between:
True and measured value
Ideal and actual dynamic response
Instantaneous and average value
Peak and rms value
Frequency response tests are more suitable for:
Static instruments
Dynamic instruments
Zero order systems
Non-mechanical instruments
When system bandwidth increases, its speed of response:
Decreases
Increases
Remains same
Becomes unstable
A device that converts one form of energy into another is called:
Sensor
Transmitter
Transducer
Actuator
The part of a transducer that first senses the quantity is called:
Primary transducer
Secondary transducer
Display unit
Conditioning unit
LVDT is used for measurement of:
Force
Pressure
Displacement
Temperature
Which transducer is based on change in resistance?
Thermocouple
Strain gauge
Piezoelectric crystal
Tachometer
Thermocouple works on:
Seebeck effect
Piezoelectric effect
Hall effect
Doppler effect
Speed of a rotating shaft is commonly measured using:
(a)
Piezoelectric transducers are best suited for:
Static pressure
Dynamic pressure/vibration
Strain measurement
Temperature
Power measurement in rotating machinery is done using:
Thermocouple
Tachometer
Dynamometer
Anemometer
A device used to measure fluid flow is:
Orifice meter
Strain gauge
LVDT
RTD
RTD is commonly used to measure:
Torque
Temperature
Displacement
Velocity
A system that maintains a desired output by comparing with reference input is called:
Open loop system
Closed loop system
Manual control
Dynamic system
Servo mechanism is primarily used for:
Temperature control
Position control
Speed regulation
Laplace transform is useful because it converts:
Time domain → Space domain
Time domain → Frequency domain
Frequency domain → Time domain
Real domain → Complex domain
The transfer function is defined as:
Output/Input in time domain
Output/Input in Laplace domain
Output ÷ gain
Error/Input
A system without feedback is called:
Stable system
Open loop system
Closed loop system
Servo system
Which diagram is used to show flow of signals?
Block diagram
Pie chart
State diagram
Bode plot
The characteristic equation of a control system is obtained from:
Input
Output
Denominator of transfer function
Time constant
Stability of a system means:
Output remains bounded for bounded input
Output increases indefinitely
System oscillates indefinitely
Gain decreases
Block diagram reduction is used to:
Minimize number of sensors
Simplify transfer function
Increase gain
Improve linearity
Frequency domain stability is verified using:
Root locus
Nyquist plot
Block diagram
Signal flow graph
