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- Question
Inhalation of silica dust by human being during hand drilling in mica mining, lead & zinc mining, silica refractory manufacture and in foundaries causes
Options- A. asphyxiation (suffocation).
- B. shortness of breath.
- C. tuberculosis.
- D. all (a), (b) and (c).
- Correct Answer
- all (a), (b) and (c).
- 1. A 'limiting reactant' is the one, which decides the __________ in the chemical reacation.
Options- A. equilibrium constant
- B. conversion
- C. rate constant
- D. none of these Discuss
- 2. With increase in the discounted cash flow rate of return, the ratio of the total present value to the initial investment of a given project
Options- A. decreases
- B. increases
- C. increases linearly
- D. remains constant Discuss
- 3. Nitric acid is produced on commercial scale in a fertiliser plant by
Options- A. oxidation of ammonia.
- B. CaNO3 + H2SO4 reaction.
- C. passing air through high voltage electric arc.
- D. none of these. Discuss
- 4. Temperature control of an exothermic chemical reaction taking place in a CSTR is done with the help of cooling water flowing in a jacket around the reactor. The types of valve and controller action to be recommended are
Options- A. air to open valve with the controller direct acting.
- B. air to close valve with the controller indirect acting.
- C. air to open valve with the controller indirect acting.
- D. air to close valve with the controller direct acting. Discuss
- 5. Combustion of furnace oil in a furnace (soaking pit) with preheated combustion air at 400°C results in saving of about __________ percent furnace oil as compared to its combustion with atmospheric air, if the flue gas outlet temperature from the soaking pit is 1200°C.
Options- A. 5
- B. 60
- C. 20
- D. 40 Discuss
- 6. Effectiveness of a fertiliser is independent of the
Options- A. nature of soil
- B. type of crop
- C. pH of soil
- D. none of these Discuss
- 7. Liquid gradient over a tray can be minimised by
Options- A. providing a higher skirt clearance or a higher weir.
- B. decreasing the number of rows of caps through which the liquid flows or by decreasing the velocity of liquid flow past the caps or by reducing the distance along the tray through which the liquid must flow.
- C. using split flow, radial flow or cascade flow for column diameter large than 4 ft.
- D. all (a), (b) and (c). Discuss
- 8. Tubes are fixed to the tube sheet (a thick circular metallic plate) by the method of tube rolling and brazing (non-removable) or ferrule connection (removable). Thickness of the tube, sheet is normally __________ the outside diameter of the tube but in no case it should be less than 22 mm (7/8").
Options- A. half
- B. three fourth
- C. equal to
- D. 1.5 times Discuss
- 9. Nuclear power plant is not located at
Options- A. Talcher (Orissa)
- B. Rawatbhata (Rajasthan)
- C. Kalpakkam (Tamilnadu)
- D. Kaiga (Karnataka) Discuss
- 10. A petroleum well is called 'dry', if it contains
Options- A. very little oil.
- B. no natural gas.
- C. only natural gas.
- D. all (a), (b) and (c). Discuss
More questions
Correct Answer: conversion
Correct Answer: decreases
Correct Answer: oxidation of ammonia.
Correct Answer: air to open valve with the controller indirect acting.
Correct Answer: 20
Correct Answer: none of these
Correct Answer: all (a), (b) and (c).
Correct Answer: equal to
Correct Answer: Talcher (Orissa)
Correct Answer: only natural gas.
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