Guru Gobind Singh Indraprastha Vishwavidyalaya 2007 B.E Electronic Instrumentation & Control Engineer END SEMESTER - Question Paper

END SEMESTER examination
4th SEMESTER (B.TECH)-MAY 2008
TIME:3HRS MAXIMUM MARKS:75

NOT; ATTEMPT 5 ques. IN ALL INCLUDING Q.1 WHICH IS COMPULSORY

Q.1 (a) explain briefly the basic methods of measurements of force (2.5)
(b) discuss in briefe the working of hydraulic load cells (2.5)
(c) What is float kind densitometry (2.5)
(d) discuss the principle of wet bulbs and dry bulbs humidity sensors (2.5)
(e) define the need and importance of vibration measurements (2.5)
(f) How are the optical flats and monochromatic light used for dimensional comparision (2.5)
Q.2 (a) What is an analytical balance?Derive an expresion for its sensitivity.Also explain (7.5)
salient features of an analytical balance
(b) A solid cylinder is to be designed to measure torque of an engine by measuring the (7.5)
angular deflection.The torque is 400Nm. Spring steal with modulus of elasticity E= (7.5)
200GN/squar meter and poison's ratio .3is used for the construction.An angular (7.5)
deflection of 10 degree is needed to get sufficient resolution. Determine a suitable
length and cylinder diameter combination for this measurement
Q.3 (a) What is accelerometer?Discuss in details the working of accelelerometer.How does it (7.5)
differs from a vibrometer
(b) discuss in detail the principle of hydrostatic Densitometry with diagram.Also provide (7.5)
its application
Q.4 (a) What is Interferometer?Determine the construction and working of an optical (7.5)
Interferometer for measurement of length
(b) discuss the construction and working of seismic kind velocity Transducer. (7.5)
How it can be used for measurement of acceleration in vibration measurement
Q.5 (a) Electrical conductivity method is being used for moisture measurement,Explain how? (7.5)
(b) differentiate ranging from the three-radio frequency absorption meter,microwave absorption (7.5)
meter and infrared absorption meter, giving their advantages and disadvantages
Q.6 (a) explain construction of gauge blocks. How are they used for measurement of length (7.5)
(b) discuss with diagram stroboscopic method of torque measurement.Giveits advantages and (7.5)
and disadvantages.The speed of shaft rotating at 2880rpm is measured using a
stroboscope. The stroboscope dial is slowly turned from stting of 4320rpm to 1400rpm
corresponding to flashing rate of 96 to 24 per second.Indicate the speed setting which
provide single, double and triple steady images
Q.7 Write short notes on any 5 (7.5)
(a) Transmission Dynamometer
(b) Quartz crystal Moisture sensor
(c) Oscillating Densitometer
(d) Measurement of roughness of the surface
(e)Electrical capacitance method of moisture measurement
(f)Elastic transducer

Earning:   Approval pending.