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  • Question

  • 1 kg of calcium carbide (CaC2) produces about 0.41 kg of acetylene gas on treatment with water. How many hours of service can be derived from 1 kg of calcium carbide in an acetylene lamp burning 35 litres of gas at NTP per hour?


  • Options
  • A. 5
  • B. 10
  • C. 15
  • D. 20

  • Correct Answer
  • 10 

    • More questions

    • 1. P2O5 percentage in the phosphoric acid produced by wet process is about

    • Options
    • A. 10
    • B. 30
    • C. 50
    • D. 70
      • Discuss
    • 2. Unit of radioactivity is

    • Options
    • A. barn
    • B. fermi
    • C. angstrom
    • D. curie
      • Discuss
    • 3. A liquid is in equilibrium with its vapor at its boiling point. On an average, the molecules in the liquid and gaseous phases have equal

    • Options
    • A. kinetic energy.
    • B. intermolecular forces of attraction.
    • C. potential energy.
    • D. total energy.
      • Discuss
    • 4. The disintegration rate of a radioactive element

    • Options
    • A. progressively increases.
    • B. progressively decreases.
    • C. remains constant throughout.
    • D. may increase or decrease depending on the material.
      • Discuss
    • 5. In washing type plate and frame filter press, the ratio of washing rate to the final filtrate rate is

    • Options
    • A. 4
    • B. 1/4
    • C. 1
    • D. 1/2
      • Discuss
    • 6. Which of the following types of nuclear reactors is most prone to radioactive hazards?

    • Options
    • A. Pressurised water reactor
    • B. Gas cooled reactor
    • C. Molten sodium cooled reactor
    • D. Boiling water reactor
      • Discuss
    • 7. 1 kgf/cm2 is not equal to

    • Options
    • A. 1 torr
    • B. 1 bar
    • C. 10000 mm wc
    • D. 100 KPa = 100 000 N/m2
      • Discuss
    • 8. Vulcanisation of rubber does not increase its

    • Options
    • A. softness
    • B. oxidation resistance
    • C. weight & strength
    • D. elasticity & water solubility
      • Discuss
    • 9. Inhalation of lead compounds present in automobile exhaust (using leaded petrol) causes

    • Options
    • A. blood poisoning.
    • B. anaemia.
    • C. nervous system disorder.
    • D. all (a), (b) & (c).
      • Discuss
    • 10. Energy consumption in a crusher decreases with increase in the

    • Options
    • A. size of the product (at constant feed size).
    • B. capacity of the crushing machine.
    • C. size of feed (at constant reduction ratio).
    • D. all (a), (b) & (c).
      • Discuss

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