D:-Water gas
Correct Answer:- ೦೧000
Question79:-Fire clay is refractory materials.
ടിം
B:-acidic
Ceneutral
De-either acidic or basic
Correct Answer: Option ®
Question80::Which among the following foam of sulphur is more stable at room temperature ?
AcPlastic
B:-Monoclinic
C-Rhombic
0:30.
டட Option-C
Question81::Which is the best and the most effective method for the removal of organic contaminants present into polluted water in very small quantities (say <200 mg/L) ?
‘AcLagooning
B:-Activated carbon adsorption
C=Biological oxidation pond
DChemical coagulation
Correct Answer: Option ®
Question82:-Industrial chimney located near tall buildings should be at least times the height of the building
५०5

8:25

ییھ
‎Correct ۸۳۰۸۷۴ ೦೧0078.‏
‎Question83:-Most efficient and suitable dust removal equipment for removal of flyash from flow gas in a thermal power plant is the‏
‎‘AGravity settling chamber‏
‎B:-Cyclone separator‏
‎೫೦೯೦೫0೦ precipitator‏
‎D-Bag filter‏
‎Correct Answer: Option-C‏
‎Question84::Which of the following dust collection equipments is the least efficient for submicronic particles 7‏
‎‘Ac Dust catcher‏
‎B:-Cyclone separator‏
‎೦830 filter‏
‎D-Hollow wet scrubber‏
‎Correct Answer:- ೦೧000‏

Question85:-Acute danger to humans life exists, is the concentration of the 00: in atmospheric air exceeds 9% (by Volume).

میم
‎Correct Answer:- Option-D‏

Question86:-The max. allowed noise level to which @ man working in a chemical plant can be exposed for 8 hrs/day is about
60 decibels
8:90 decibels
೦-೩05 decibels

5:120 decibels