1091. Nitrogen compounds are not used in the manufacture of :
A. Ferilisers
B. Gun powder
C. Tip of match sticks *
D. Explosive
1092. Plate and frame filter press are usually made of :
A. Mild steel
B. Cast iron*
C. Stainless steel
D. Galvanized iron
1093. Blast furnace coke is made from coal by :
A. Low temperature carbonisation
B. High temperature carbonisation *
C. Medium temperature carbonisation
D. Using air to heat the coal in an oven
1094. Headstrong blocks having lower porosity have :
A. High insulating properties
B. Low heat capacity
C. Low thermal conductivity
D. Greater strength *
1095. For the same process conditions , the reflex ratio of an unlagged distillation column
A. Decreases in winter
B. Increases in winter *
C. Increases in summer
D. None of these
1096. Caustic soda can be stored in ________ drums:
A. Steel *
B. Cast iron
C. Brass
D. Gum metal
1097. X-rays are :
A. Positively charged
B. Negatively charged
C. Neutral *
D. Of higher wavelength than visible light
1098. Brass is an alloy of :
A. Nickel and tin
B. Copper and zine *
C. Tin and Lead
D. Copper, nickel and zinc
1099. What is the PH of distilled water ?
A. 0
B. 1
C. 7 *
D. 14
1100. During the manufacturing process, glass’s coefficient of thermal expansion is decreased by:
A. CaO
B. MnO2
C. ZnO *
D. FeS