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Chemical Engineering Basics problems

  • 1. Which of the following is not an explosive?

  • Options
  • A. TNT
  • B. CMC
  • C. RDX
  • D. Lead azide
    • Discuss
  • 2. Chromium molybdenum steel can not be welded using __________ welding.

  • Options
  • A. thermit
  • B. electrical resistance
  • C. oxy-acetylene
  • D. any of these
    • Discuss
  • 3. Resistance of an electrical conductor is proportional to its (where, l = length and A = cross-sectional area of the conductor)

  • Options
  • A. A
  • B. l
  • C. A2
  • D. both 'a' & 'b'
    • Discuss
  • 4. Absolute zero pressure can be attained at a temperature of

  • Options
  • A. 0°C
  • B. 50°K
  • C. 0°R
  • D. none of these
    • Discuss
  • 5. Area under the stress-strain curve upto the __________ is referred to as the modulus of resilience.

  • Options
  • A. yield strength
  • B. elastic limit
  • C. proportional limit
  • D. maximum point
    • Discuss
  • 6. The softness or hardness of a grinding wheel depends upon the type & amount of bonding material used. For general purpose cutter grinding __________ grinding wheel is normally used.

  • Options
  • A. hard
  • B. soft
  • C. silicon carbide
  • D. aluminium oxide
    • Discuss
  • 7. Electrical conductivities of semi-conductors are of the order of __________ ohm/cm.

  • Options
  • A. 10-3
  • B. 103
  • C. 10-15
  • D. l015
    • Discuss
  • 8. Friction factor for fluid flow in pipe does not depend upon the

  • Options
  • A. pipe length.
  • B. pipe roughness.
  • C. fluid density & viscosity.
  • D. mass flow rate of fluid.
    • Discuss
  • 9. Fog is an example of colloidal system of

  • Options
  • A. solid dispersed in gas.
  • B. solid dispersed in liquid.
  • C. liquid dispersed in gas.
  • D. gas dispersed in liquid.
    • Discuss
  • 10. The most economical channel section for the fluid flow is the one for which the discharge is maximum for a given cross-sectional area. Vertical velocity distribution in an open channel for laminar flow can be assumed to be

  • Options
  • A. parabolic
  • B. hyperbolic
  • C. straight line
  • D. none of these
    • Discuss

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