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Posted Date: 25 Dec 2008 Posted By: sridevi Member Level: Diamond
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2006 Birla Institute of Technology-Mesra ENGINEERING MEASUREMENTS University Question paper
Birla Institute of Technology & Science, Pilani
Distance Learning Programmes Division
Second Semester 2006-2007
Mid-Semester Test
(EC-1 Regular)
Course No. : TA ZC232
Course Title : ENGINEERING MEASUREMENTS
No. of Pages = 1
No. of Questions = 4
Nature of Exam : Closed Book
Weightage : 40%
Duration : 2 Hours
Date of Exam : 03/02/2007 (AN)
Note:
1. Please follow all the Instructions to Candidates given on the cover page of the answer book.
2. All parts of a question should be answered consecutively. Each answer should start from a fresh page.
3. Mobile phones and computers of any kind should not be brought inside the examination hall.
4. Use of any unfair means will result in severe disciplinary action.
Q.1 (a) What is meant by sensitivity, accuracy, and precision? [3]
Q.1 (b) What kind of impedance matching is desired for (a) maximum power transmission and (b) minimum influence on the output of the system? [4]
Q.1 (c) Why is an uncertainty analysis important in the preliminary stages of experimental planning? [3]
Q.2 (a) A thermometer is initially at a temperature of 70 0F and is suddenly placed in a liquid which is maintained at 300 0F. The thermometer indicates 200 and 2700F after time intervals of 3 and 5 s, respectively, estimate the time constant for the thermometer. [5]
Q.2 (b) Two resistors R1 and R2 are connected in series and parallel. The value of the resistances are
R1= 100.0 ± 0.1 ?
R2 = 50.0 ± 0.03 ?
Calculate the uncertainty in the combined resistance for both the series and the parallel arrangements. [5]
Q.3 (a) Explain the principle of optical method. Also write the different applications of interferometer. [5]
Q.3 (b) A steel tape is used to measure a distance of 20 m at a 10 0C. Assuming that the tape will measure the true distance when the temperature is 20 0C. What would be the indicated distance at 10 0C? What would be the indicated distance at 400C? [5]
Q.4 (a) Describe the principle of operation of McLeod gage. [5]
Q.4 (b) A U-tube manometer contains a fluid having a specific gravity of 1.75 and is used to measure a differential pressure in water. What will be the differential pressure, in pascals, for a reading of 10.5 cm? [5]
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