Related Questions

Temperature maintained in the emulsion polymerisation reactor for PVC manufacture is about __________ ° C.
A -20
B 50
C 250
D 500
Grog addition in fireclay during brick manufacture is done to
A Reduce its shrinkage on heating
B Impart greater spalling resistance
C Enhance the strength of fired refractories
D All of the above
Co-efficient of thermal expansion of glass is decreased by the addition of __________ during its manufacture.
A CaO
B MnO2
C ZnO
D FeS
Addition of grog in fireclay brick during its manufacture is advantageous, because it results in
A Less shrinkage in heating, decreased apparent porosity & increased specific gravity
B High strength & thermal spalling resistance
C Less addition of water to get a workable plasticity & lesser time required for drying the raw refractories and hence increased rate of production
D All of the above
If 15 men working independently and at the same rate can manufacture 27 baskets in an hour, how many baskets would 45 men working independently and at the same rate manufacture in 40 minutes?
A 27
B 35
C 40
D 54
If 15 men working at the same rate can manufacture 27 baskets in an hour, how many baskets would 45 men manufacture in 40 minutes?
A 27
B 54
C 35
D 40
Addition polymerisation is not involved in the manufacture of
A Low density polythene
B Poly vinyl chloride
C Polystyrene
D Polyhexamethylene adipamide
PVC এর উপাদান কোনটি ?
A CH≡CH 
B CH2=CHCl
C    ClCH=CHCl 
D    CH2=CHCH2Cl 
পলি ভিলাইল ক্লোরাইড (PVC) কোনটি থেকে তৈরি করা যায়?
A      CH2=CH2
B  CH≡CH    
C  CH3-CH=CH2  
D   CH3-CH3
PVC এর মনোমার কোনটি?
A CH2=CHCl
B CH2=CH2
C CH3CH=CHCL
D CH2=CHCN

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