Diploma Mechanical Instrumentation Board Exam Question papers
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We have added Diploma Mechanical Instrumentation Board Exam question paper for third year mechanical engineering. You can download Diploma Mechanical Instrumentation Board Exam Question papers as pdf
OBJECTIVES
- Study about the different instruments, errors.
Impart knowledge on displacement measurements
Understand about temperature measurement
Study about miscellaneous measurement
Understand the application of measurement system
Unit I Types of measurement, classification of instruments – Static terms and characteristics – Range and Span, Accuracy and Precision, Reliability, Calibration, Hysteresis and Dead zone, Drift, Sensitivity, Threshold and Resolution, Repeatability and Reproducibility, Linearity. Dynamic characteristics – Speed of response, Fidelity and Dynamic errors, overshoot. Measurement of error – Classification of errors, environmental errors, signal transmission errors, observation errors, operational errors Transducers : Classification of transducers, active and passive,
resistive, inductive, capacitive, piezo-resistive, thermo resistive.
Unit II Displacement Measurement: Capacitive transducer, Potentiometer, LVDT, RVDT, Specification, Selection & application of displacement transducer. Optical measurement scale andencoders Pressure Measurement: Low pressure gauges- McLeod Gauge, Thermal conductivity gauge, Ionization gauge, Thermocouple vacuum gauge, Pirani gauge.
High Pressure gauge-Diaphragm, Bellows, Bourdon tube, Electrical resistance type, Photoelectric pressure transducers, piezoelectric type, Variable capacitor type
Unit III Temperature Measurement: Non-electrical methods – Bimetal, Liquid in glass thermometer and Pressure thermometer. Electrical methods – RTD, Platinum resistance thermometer, Thermistor, Thermoelectric methods – elements of thermocouple, Seebek series, law of Intermediate metals, thermo emf measurement.
Flow Measurements: Variable area meter – Rota meter, Variable
velocity meter – Anemometer, Special flow meter – Hot wire anemometer, Electromagnetic flow meter, Ultrasonic flow meter
,Turbine meter ,Vortex shedding flow meter
Unit IV Miscellaneous Measurement:
Introduction to sound measurement and study of Electro dynamic microphone and Carbon microphone.
Humidity measurement –Hair hygrometer, Sling psychrometer, Liquid level measurement – direct and indirect methods.
Force & Shaft power measurement – Tool Dynamometer (Mechanical Type), Eddy Current Dynamometer, Strain Gauge Transmission Dynamometer. Speed measurement -Eddy current generation type tachometer, incremental and absolute type, Mechanical Tachometers, Revolution counter & timer, Slipping Clutch Tachometer, Electrical Tachometers, Contact less Electrical tachometer, Inductive Pick Up, Capacitive Pick Up, Stroboscope, Strain Measurement – Stress-strain relation, types of strain gauges, strain gauge materials, resistance strain
gauge- bonded and unbounded, types (foil, semiconductor, wire wound gauges), selection and installation of strain gauges load cells, rosettes.
Unit V Control Systems :
Block diagram of automatic control system, closed loop system, open loop system, feedback control system, feed forward control system, servomotor mechanism. Comparison of hydraulic, pneumatic, electronic control systems, Control action: Proportional, Integral, derivative, PI, PD, PID. Applications of
measurements and control for setup for boilers, airconditioners, motor speed control.
Text Books:
1) Mechanical Measurements &Control-D.S.Kumar Metropolitan Publications, New Delhi.
2) Mechanical & Industrial Measurements-R.K.Jain-Khanna Publications, NewDelhi,
3) Mechanical Measurements &Instrumentation-A.K.Sawhney-Dhanpat Rai & Sons, NewDelhi.
4) Measurement Systems-E. O. Doebelin-Tata McGraw Hill Publications.
5) Mechanical Measurement &Control-R.V. Jalgaonkar-Everest Publishing House, Pune
Diploma Mechanical Instrumentation Board Exam Question papers Pdf Link
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