Shivaji University 2006 B.E Mechanical Engineering S.E.(Mech/Auto.)(Part-I) , ELECTRICAL TECHNOLOGY AND ELECTRONICS - Question Paper
Sunday, 19 May 2013 08:00Web
ELECTRICAL TECHNOLOGY AND ELECTRONICS
Time:3 Hours
Maximum Marks:100
Instructions:
1)Attempt any 3 ques. from every part.
2)Draw neat figures wherever necessary.
1. a) Compare group drive Vs individual drive. [Marks 8]
b) Expline torque Vs armature current and speed Vs armature current characteristics of d.c. motors.
] State their applications. [Marks 8]
2. a) Expline constructionand working of PMMC instruments. [Marks 8]
b) Expline how 2 Wattmeter methad can be used for measuring total power in 3-phase circuits.
Draw circuit and vector diagram. [Marks 8]
3. a) Expline the construction and working of veriable reluctance stepper motor. [Marks 8]
b) 2 wattmeter methods is used to measure the power absorbed by a 3- phase induction motor.
The Wattmeter readings are 12.5 KW and -4.8 KW. [Marks 8]
Find:
1) The power absorbed by machine
2) Load power factor
3) Reactive power taken by load.
4. a) Expline construction and working of Ajax - Wyatt furnace. [Marks 8]
b) define different kinds of electric welding. [Marks 8]
5. Write short notes on subsequent : [Marks 18]
1) Universal motor.
2) Electric arc furnaces
3) Induction kind energy meter.
6. a) Expline the effect of temperature on the volt-ampere characteristics of a diode. [Marks 8]
b) define the operation of PNP transistor. [Marks 8]
7. a) Draw and expline 2 stage RC-coupled amplifier. [Marks 8]
8. a) With the help of circuit diagram, expline how Op-amp is used as a integrator. [Marks 8]
b) Expline ideal charactristics of OP-amp. [Marks 8]
9. a) Convert hexadecimal two F 59 to its decimal equivalent. [Marks 5]
b) What is the hexadecimal equivalent of decimal 62359 ? [Marks 5]
c) What is the decimal euivalent of octal 325.736 ? [Marks 6]
10. Write short note on any 3 : [Marks 18]
i) C.R.O.
ii) X - Y plotter
iii) X - Y recorders
iv) Comparator using Op-amp
v) Logic gates.
| Earning: Approval pending. |
