Deemed University 2011 B.Tech Mechanical Engineering University: Lingayas University Term: V Title of the : Measurement & Instrumentation - Question Paper
Roll No. ..
Lingayas University
B.Tech. 2nd Year (Term V)
Examination Feb 2011
Measurement & Instrumentation (ME - 209)
[Time: 3 Hours] [Max. Marks: 100]
Before answering the question, candidate should ensure that they have been supplied the correct and complete question paper. No complaint in this regard, will be entertained after examination.
Note: Attempt five questions in all. All questions carry equal marks. Question no. 1 is compulsory. Select two questions from Section B and two questions from Section C.
Section A
Q-1. Part A
Select the correct answer of the following multiple choice questions. [10x1=10]
(i) Piezometer is used for measuring
(a) Gauge pressure (b) Vacuum
(b) Absolute pressure (d) Pressure difference
(ii) A U-tube differential manometer is used inverted when
(a) Pressure difference is small
(b) Pressure difference is large
(c) Can not be used inverted
(d) Can be used inverted
(iii) Which of following can not be used for negative pressures?
(a) Piezometer (b) Pirani gauge
(c) U-tube manometer (d) Bourdan gauge
(iv) Errors which may be variable both in magnitude & nature are classified as
(a) Hysterisis error (b) Random error
(c) Systematic error (d) Interaction error
(v) Gearing, backlash, friction between moving parts and scale inaccuracies are called
(a) Instrument error (b) Interference error
(c) Calibration error (d) Interaction error
(vi) A pitot static tube measures
(a) Static pressure (b) Dynamic pressure
(c) Total pressure (d) Total & static pressure
(vii) Which of following instrument is a rate meter?
(a) Venturimeter (b) Hot wire anemometer
(c) Nutating disc meter (d) Current meter
(viii) The hot wire anemometer is used to measure
(a) Pressure gases (b) Liquid discharges
(c) Gas velocities (d) Wind velocities
(ix) Which metal/non-metal has highest temp. range?
(a) Semi-conductors (b) Nickel
(c) Copper (d) Platinum
(x) Self compensating capillary tube is used in filled in system thermometer to eliminate or minimize the
(a) Elevation effect (b) Immersion effect
(c) Barometric effect (d) Temperature effect
Part B
(i) Define threshold & resolution.
(ii) Define drift & reproducibility.
(iii) Define the principle of venturimeter.
(iv) Define the principle of orifice meter.
(v) Describe absolute, gauge & vacuum pressures. [5x2=10]
Section B
Q-2. (a) Briefly explain the principle employed in manometer used for the measurement of pressure.
(b) Enumerate the desirable characteristics of manometer liquids. [2x10=20]
Q-3. (a) Explain the principle of thermal flow meter.
(b) Explain the working of resistance thermometer & thermistors. [2x10=20]
Q-4. (a) List the main requirement of strain gauge and mention the type of gauge which meets most of requirement. [10]
(b) Define gauge factor of resistance strain gauge. [5]
(c) List any five physical properties of matter which are used to measure temperature & state clearly how each is used. [5]
Section C
Q-5. (a) Describe zero error & static error with suitable examples.
(b) Describe the role of instruments in industrial processes with examples. [2x10=20]
Q-6. (a) Explain the construction, working of unbonded & bonded strain gauges with neat sketches.
(b) Explain the working of ionization transducer with neat sketch. [2x10=20]
Q-7. (a) Explain the working of hydraulic load cell with neat diagram.
(b) Explain the working of torque transducers with neat sketches. [2x10=20]
Q-8. (a) Describe ultrasonic level gauges with neat diagram.
(b) Describe positive displacement flow meters with neat diagram and also mention its merits & demerits. [2x10=20]
| Earning: Approval pending. |
