Maharashi Dayanand University (MDU) 2009-6th Sem B.E Mechanical Engineering MEASUREMENT

2311
B.E. sixth SEMESTER (MECH. ENGG.)
exam - MAY 2009
MEASUREMENT & INSTRUMENTATION
PAPER : ME-310-E

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B. E. 6th Semester (Mech. Engg.) Examination - May 2009

. Measurement & Instrumentation Paper: ME-310-E

Time : Three hours ]    [ Maximum Marks: 100

Before answering the question, candidates should ersure that they have been supplied the correct and complete question paper. No complaint in this regard, will be entertained after examination.

Note : Attempt any five questions. All carry equal marks.

1.    (a) What are the basic parameters for classifying

Instruments, Draw block diagrams of a feedback type measurement system.    10

(b) Explain various methods of calibrations.    10

2.    (a) Derive the expressions for overall internal

uncertainty in compound quantities.    10

(b) What are the various types of errors in performance parameters.    10

3.    (a) A volt meter with internal resistance of 200 kw is

connected across a resistance. It reads 250 v. A

milli ammeter (with very small resistance) connected in series of the same resistance reads 10 mA. Determine apparent resistance, actual resistance and loading error.    10

(b) Explain the working principle of Piezo Electric transducer.    10

4.    (a) Explain Digital Encoders. What is the working

principle of optical encoder.    10

(b) A first crder instruments is to measure signals . with frequency context up to 100 Hz with an amplitude inaccuracy of 5%. What is the maximum allowble time const. What will bo the phase shift at 50Hz ?    10

5.    (a) Explain working principle of mechanical

Amplifying element.    10

(b) Give an arrangement of an oparnp to produce an o/p eo such that eo = 2+ 3ei, ei is i/p voltage. 10

6.    (a) Explain the working principle of manometer.

Derive the expression' for inclined tube manometer.    10

(b) For a certain thermister 3140 k and resistance at 27C is 1050 v. Thermister resistance is 2330. Find the temp, measured.    10

7.    (a) Explain- Hot wire Anemometer for flow

measurement.    10

(b) The' table shows the' frequency distribution of a

resistor mnu tacturer. R(O) 93-95 96-98 99-101 102-104 105-107 F 4 15 33 21 '7

Determine:

(i)    arithmetic mean

(ii)    median

(iii)    modal value

8. Write short notes on :    20

(a)    Pyrometer

(b)    Electromagnetic Flow meter

(c)    Load cell

(d)    Impulse function

2311 -2250-(P-3){Q-8)(09) ( 3 )

Attachment: maharashi-dayanand-university--mdu--2009-b-e-mechanical-engineering-22766-1.pdf

Earning:   Approval pending.