hai dudes here ICS MID 2 QUESTIONS FOR MECHANICAL IV -1 ALL THE BEST Ics 2nd mid qun’s UNIT - V 1. Explain the construction, principle of working and advantages of following type of Accelerometers (a) Strain gauge accelerometer (b) Variable resistance vibration sensor (c) Capacitance vibration sensor 2. (a) Explain the principle of working of the following: i) Electrical generator dynamometer ii) Driving dynamometer (b) If a shaft of diameter 3 cm and length 1 m is transmitting torque of 700 N-m, second the angular detection of the shaft assuming G = 8 x 1010 N/m2. 3. (a) Explain your understanding on \calibration of measurement system. (b) A diaphragm type pressure measuring instrument is calibrated for absolute pressures of 6 to 760mm of mercury. It has an accuracy of 0.01% based upon scale span. Calculate the scale range, scale span and maximum static error. 4. (a) What is the temperature compensation with respect to strain gauges? (b) Explain how an unbonded strain gauge is used to measure strain? (c) List the essential characteristics required for the backing material of a bonded strain gauge. UNIT - VI 1. (a) Distinguish between: i. Manometer ii. Piezometer. (b) Explain the principle of operation of a diaphragm gauge? 2. Derive the transfer function of a thermal system when the heat input rate is sud- denly increased from its steady conditions . Discuss the assumptions made. 3. (a) What are factors to be considered for Level Measurement Sensor Selection. (b) Distinguish between ultrasonic and capacitive type level measuring gauges. 4. (a) List the requirements of a control system (b) Propose a control system to fill a container with water after it is emptied through a stop cock at the bottom. The system must automatically shut of the water when the container is filled. Draw the block diagram of the proposed System. Which component or components comprise the plant ,the controller and feed back. UNIT - VII 1. Show that there exists a linear relationship between the volume flow rate and Displacement of oat in the case of a rotameter .Prove that if the density of the float material is made twice that of owing fluid, the volume flow rate becomes Independent of the density of the owing fluid and compression is almost complete for all flows. 2. A seismic motion transducer has a mass of 50 gm. Its undamped natural frequency is 10 Hz and damping ratio is 0.6. The relative motion of the seismic mass with respect to the frame of the transducer is converted to a voltage by a first order transducer which has a static voltage sensitivity of 2 V/mm and time constant of 0.01 s. Find the output voltage for an input motion of 0.5 mm at a frequency of 20 Hz. 3. Explain the operation of ordinary traffic signals which control the automobile traffic at roadway intersections. Do they constitute an open-loop or closed-loop control system? Justify your answer. How can the traffic be controlled more effectively? 4. (a) What are thermopiles? What are their advantages? (b) Explain by means of neat sketches, the working of Total radiation pyrometer. UNIT- VIII 1. Show that mercury in glass thermometer is a first order instrument. How can be the time constant value reduced and sensitivity value increased for the thermometer? 2. Explain the operation of ordinary traffic signals which control the automobile traffic at roadway intersections. Do they constitute an open-loop or closed-loop control system? Justify your answer. How can the traffic be controlled more effectively? 3. (a) Describe working principle of U-tube differential manometer with a neat sketch. (b) A differential manometer connected at the two points A and B in a pipe containing an oil of specific gravity of 0.9, shows a difference in mercury levels as 150 mm. Find the difference in pressures at the two points. 4. (a) Describe the use of a simple U-tube manometer. Discuss the various modifi- cations needed to increase its sensitivity, accuracy. (b) Discuss the merits and demerits of elastic sensing elements.
Posted on: Mon, 28 Oct 2013 13:19:56 +0000
Trending Topics
Recently Viewed Topics
© 2015