D:-Water gas
Correct Answer:- Option-é
Question79:-Fire clay is refractory materials
Acbasic
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.
Correct Answer:- 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
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.
AOS
8:25
‏ھی‎
‎0:55
‎Correct Answer:- ೦೧0008.
Question83:-Most efficient and suitable dust removal equipment for removal of flyash from flow gas in a thermal power plant is the
ಆ settling chamber
B:-Cyclone separator
CoElectrostatic 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
830 filter
D-Hollow wet scrubber
Correct Answer:- Option-é
Question85:-Acute danger to humans life exists, is the concentration of the C0. in atmospheric air exceeds 9% (by Volume)
Aol
Be3
‏جب‎
‎0:20
‎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
B:-90 decibels
೦-೩05 decibels

D:-120 decibels