logo

CuriousTab

CuriousTab

Process Control and Instrumentation problems

  • 1. The unit step response of the transfer function 1/(s2 + 2s + 3)

  • Options
  • A. has a non-zero slope at the origin.
  • B. has a damped oscillatory characteristics.
  • C. is overdamped
  • D. is unstable
    • Discuss
  • 2. __________ thermometer can not measure sub-zero (< 0° C) temperature,

  • Options
  • A. Mercury in glass
  • B. Bimetallic
  • C. Vapor pressure
  • D. Resistance
    • Discuss
  • 3. The amplitude ratio for the sinusoidal response of __________ is < 1.

  • Options
  • A. transportation lag
  • B. first order system
  • C. second order system
  • D. none of these
    • Discuss
  • 4. Which of the following controllers has maximum offset?

  • Options
  • A. P-controller
  • B. P-I controller
  • C. P-D controller
  • D. P-I-D controller
    • Discuss
  • 5. Liquid argon level in a pressurised storage tank (at 3 kg/cm2 ) is measured by a/an

  • Options
  • A. gage glass
  • B. external float gage
  • C. differential pressure gage
  • D. none of these
    • Discuss
  • 6. Starting temperature of optical radiation pyrometer is __________ °C.

  • Options
  • A. 800
  • B. 400
  • C. 1200
  • D. 1500
    • Discuss
  • 7. Magnetic flowmeters are generally not used for the velocity/flow measurement of hydrocarbons due to their

  • Options
  • A. low thermal conductivity.
  • B. low electrical conductivity.
  • C. high viscosity index.
  • D. low flash point.
    • Discuss
  • 8. The calibration data of a thermocouple with its cold junction at 0°C are given below.
    Chemical Engineering Process Control and Instrumentation: The calibration data of a thermocouple with its cold junction at 0°C are given below.
    The hot junction of the thermocouple is placed in a bath at 80°C, while its cold junction is at 20°C. What is the emf of thermocouple?

  • Options
  • A. 3.26 mv
  • B. 0.80 mv
  • C. 2.46 mv
  • D. 2.43 mv
    • Discuss
  • 9. Turbine flow meters are suitable for

  • Options
  • A. very limited flow ranges.
  • B. cryogenic flow measurements.
  • C. aerospace and in air borne applications.
  • D. both (b) and (c).
    • Discuss
  • 10. Which of the systems having the following transfer function is stable?

  • Options
  • A.
  • B.
  • C.
  • D.
    • Discuss

First 13 14 15 ... 24 .. 33 34 Last

Aptitude

Engineering

Programming

Reasoning

Links

Copyright ©CuriousTab. All rights reserved.