Measurement Technology (INDSE7E) — DU B.Sc. (Hons) Instrumentation Previous Year Question Papers

Measurement Technology (DSE) (a) A U-tube manometer containing mercury is used to measure the pressure of a gas. The difference in mercury levels is 150 mm. Atmospheric pressure is 101.3 kpa. Find the absolute pressure of the gas. (b) Give three applications ofxY recorder. (c) What is the need of measuring humidity? What are hygroscopic materials used (d) £sntaht:¥h:mpenf:;:;ie of operation of an orifice meter (e) The chart speed of a recording instrument is 40 mm/s. One cycle of the signal is recorded over 5 mm. Determine the frequency of the signal. (f) Define an accelerometer and mention the key parts involved in its construction. (a) Explain the construction and working of a well type manometer with a neat (3) (b) What is a diaphragm pressure gauge? Describe the construction and working of (6) a flat and corrugated diaphragm. (c) Describe the working principle, construction and working of a thermal (6) conductivity gauge. (a) A venturi meter is fitted in pipe carrying water. The upstream pipe diameter is 150 mm and the throat diameter is 75 mm. The pressure difference between the upstream section and the throat is measured by a mercury U-tube manomete\r which shows a deflection of 0.18 in. Take density of water to be 1000kg/m3 and density of mercury to be 13600 kg/m3.If the coefficient of discharge is 0.98, find the volumetric discharge through the pipe. (b) (c) With the help of a neat diagran, describe the construction and working of a rotameter. Which flowmeter works. on the principle ofFaraday's law of electromagnetic induction? Explain its principle and working. Write its two applications also. (a) (b) (c) (a) (b) (c) Describe the operation of a strip chart recorder. List two mechanisms used for (6) Explain the three types of rough indicators used for detection of acceleration. (6) With the help of`a neat diagram, explain the working principle of an inkjet (6) Discuss the function of a sling psychrometer in measuring humidity. Explain (6) how wet-bulb and dry-bulb temperatures are used to find relative humidity. Explain the working of a radioactive moisture measurement system using a (6) schematic diagram. What is apsychrometric chart? List and discuss all the terms by which we can (6) determine humidity. (a) (b) (c) What are bellows? Describe with neat sketch how they can be used to measure absolute pressure and differential pressure? Explain the construction and working of a standard pressure device used for testing and calibration of pressure measuring instruments. With the help of neat sketches, describe laminar and turbulent flow in pipes. Explain the characteristics and practical example of each type of flow. (a) (b) (c) Explain the working of mechanical tachometer which is preferred for low RPM and high RPM measurement.