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Reliance Energy Model Placement Paper

Posted on :12-04-2016

Technical Questions (Instrumentation):

Q1. 1 gm/cc = ____kg/m3.


Q2. 1 atm = ___kg/cm2.


Q3. What range of pressure used in pneumatic systems(ans: 3-15 psi).


Q4. What type of orifice used for gas-liquid mixture flow: concentric / segmental / eccentric.


Q5. Given PB of 60%,70%,80%,90%, which one is the most sensitive?


Q6. Integral orifice is used for low/medium/high flow applications.


Q7. Which of the following is a variable area type flow meter(ans: rotameter).


Q8. For a 36” dia gas pipeline which of the following flowmeter is used: orifice/annubar/target flow meter.


Q9. A compressor should be operated above/on/near the surge line.


Q10. For measuring ?-ray radioactivity what would you use: scintillation counter/cathode ray tube/all of the above.


Q11. In cascade control ___ of the primary controller is the___ of the secondary controller.


Q12. For derivative control step input gives ___ output.


Q13. DemorganÂs law is useful bcoz it converts NOR to NAND/NOR to AND/etc.


Q14. NAND is called a universal gate bcoz..


Q15. RS-485 can be used for multidrop communication: true/false.


Q16. Which of the following is a high-temp O2 analyser: zirconia / paramagnetic / radiation/etc.


Q17. A question on gas chromatography which I canÂt recollect.


Q18. Given a ckt find out the current in a particular branch.


Q19. Zener barrier is used to: limit input current/limit input current coming from field/limit energy going to field.


Q20. Which of the following is type K thermocouple: copper constantan/iron constantan/ Pt rhodium/ chromel alumel.


Q21. For measuring 1200°C what thermocouple would you use: K/J/E/R.


Q22. Full form of MIMS as used with thermocouples.


Q23. Relation between flow rate and ?P

ANS: Q a Ă–?P


Q24. Problem using the above relation.


Q25. What can be used to detect combinational hazards in circuits: truth table/K-map/sequence table.


Q26. If a chip containing a RAM has power switched off and then on, then data in the RAM is irretrievably lost/data is retained/data is retained with minor modifications/chip is damaged.


Q27. Iif a 20 MHz wave is fed into a cascade of mod-10,mod-5 and mod-4 counters the lowest o/p freq obtainable is___.


Q28. For a tank containing water to a ht. of 2m pressure at the bottom in kg/cm² is____.


Q29. For noise reduction what can be connected across the P.S. pins of an IC: resistor/capacitor/diode/transistor.


Q30. The no. of o/p states in a 4-bit ADC.


Q31. If the previous state in a 4-bit up/down counter is 1111, the next state will be___.


Q32. Advantage of double seated control valve.


Q33. Which of the following types of CV has tight shut-off: III/IV/V/VI.


Q34. Ratio of maximum  to minimum  Controllable flow of a CV is called___.


Q35. Which of these is not a CV characteristic: quick opening/linear/modified parabolic/equal %.


Q36. An I/P converter converts analog to pneumatic/analog to digital/digital to pneumatic.


Q37. The commonly used range of analog current signal is___.


Q38. Full form of CMOS.


Q39. Which of these is required for calibration: calibrating equipment / controlled environmental conditions/competent personnel / traceability of standards  / all of the above.


Q40. Glycerine filled gauges are used for prevention of corrosion / pulsation / some other option / all of these.


Q41. Full form of TCP/IP.


Q42. Which of the following is insensitive to noise: optical fibre/twisted pair/coaxial cable.


Q43. Maximum cable length in RS-232C: 50m/100m/150m/200m.


Q44. Which of the foll cannot be used to generate square waves: astable / monostable / bistable / bootstrapping ckt.


Q45. Advantage of floating power supply


Q46.  For flow control loop what can be used: PID / PI / P control.


Q47. Capacitor energy equation 

ANS: W=½CV²


Q48. Given an 8-bit string identify which does not have even parity.


Q49. What is done in a flapper-nozzle amplifier.


Q50. Dead weight tester operates on which principle 

ANS: pascalÂs law


  
   






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