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- Question
Reciprocating screens are normally inclined at an angle of 5° with the horizontal and employ gyratory motion at feed end & reciprocating motion at the discharge end. They are not suitable for the screening of the
Options- A. light metal powder down upto 4 meshsize.
- B. dry chemicals.
- C. heavy tonnages of rocks or gravel.
- D. powdered food & granular materials.
- Correct Answer
- heavy tonnages of rocks or gravel.
- 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
More questions
Correct Answer: 30
Correct Answer: curie
Correct Answer: kinetic energy.
Correct Answer: progressively decreases.
Correct Answer: 1/4
Correct Answer: Boiling water reactor
Correct Answer: 1 torr
Correct Answer: softness
Correct Answer: all (a), (b) & (c).
Correct Answer: all (a), (b) & (c).
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