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  • Question
  • Roof of a basic electric furnace is made of __________ bricks.


  • Options
  • A. superduty fireclay
  • B. silica
  • C. chromite
  • D. none of these

  • Correct Answer
  • silica 


  • More questions

    • 1. During sewage treatment, the sewage is subjected to __________ treatment in Imhoff tank.

    • Options
    • A. filtration
    • B. digestion
    • C. sedimentation
    • D. both (b) and (c)
    • Discuss
    • 2. Sillimanite is a __________ refractory.

    • Options
    • A. basic
    • B. neutral
    • C. high alumina
    • D. insulating
    • Discuss
    • 3. In catalytic alkylation, higher iso-butane to olefin ratio gives

    • Options
    • A. low final boiling point product
    • B. higher yield
    • C. both (a) and (b)
    • D. neither (a) nor (b)
    • Discuss
    • 4. Pick out the symbol for "locally mounted instrument" in instrumentation diagram.

    • Options
    • A.
    • B.
    • C.
    • D.
    • Discuss
    • 5. Paraffin base crude oil as compared to asphalt base crude gives

    • Options
    • A. higher yield of straight run gasoline.
    • B. higher octane number gasoline.
    • C. lower viscosity index lube oil.
    • D. poorer yield of lube oil.
    • Discuss
    • 6. Normal mercury thermometer can be used to measure a temperature of about 300°C. However, its maximum temperature measurement range can be increased upto about 500°C by

    • Options
    • A. filling nitrogen under pressure in the stem.
    • B. increasing the diameter of the tube.
    • C. using steel tube in place of glass tube.
    • D. accounting for the tube expansion.
    • Discuss
    • 7. For measuring the temperature of a red hot furnace, which is the most suitable instrument?

    • Options
    • A. Platinum resistance thermometer
    • B. Thermocouple
    • C. Optical pyrometer
    • D. Bimetallic thermometer
    • Discuss
    • 8. In second order underdamped system,

    • Options
    • A. decay ratio = overshoot
    • B. decay ratio = (overshoot)2
    • C. overshoot increases for increasing damping co-efficient.
    • D. large damping co-efficient means smaller damping.
    • Discuss
    • 9. The main use of heavy gas oil produced by the vacuum distillation unit is as a

    • Options
    • A. blending component for kerosene.
    • B. blending component for petrol.
    • C. feedstock for fluid catalytic cracking unit.
    • D. none of these.
    • Discuss
    • 10. Catalyst used in the production of high density polythene by low pressure Ziegler process is

    • Options
    • A. aluminium triethyl activated with TiCl4
    • B. platinum
    • C. molybdenum
    • D. Nickel
    • Discuss


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