Pitch (a product of coal tar distillation) is always mixed with creosote oil, when it is to be burnt in a burner, because__________________?
(A) Its calorific value is very less
(B) Tar neutralises the residual acids present in pitch
(C) It reduces viscosity and imparts fluidity for its transportation through pipelines at economic pressure drop
(D) All A,
Calcination of limestone is not done in a ______________ kiln for producing lime ?
(A) Vertical shaft
(B) Rotary
(C) Fluidised bed
(D) Fixed bed
Graphite is a/an________________________?
(A) Electrical insulator
(B) Allotrope of carbon
(C) Moderator used in nuclear reactor
(D) Both
Transportation of 35% oleum during winter suffers from the problem of freezing, which can be overcome by the addition of small quantity of_____________________?
(A) Nitric acid
(B) Hydrochloric acid
(C) Methyl alcohol
(D) Formic acid
Finely ground calcium aluminate & silicate is a/an ____________________?
(A) Cermet
(B) Cement
(C) Abrasive
(D) Explosive
Molecular weights of polymers are in the range of__________________ ?
(A) 102 – 102
(B) 105 – 109
(C) 102 – 107
(D) 109 – 1011
Which of the following coals has the highest calorific value ?
(A) Lignite
(B) Sub-bituminous
(C) Anthracite
(D) Peat
Varnish does not contain____________________?
(A) Pigment
(B) Thinner
(C) Dryer
(D) Anti-skimming agent
Mannheim furnace is used in the manufacture of_________________?
(A) Hydrochloric acid
(B) H2SO4 by Chamber process
(C) Calcium carbide
(D) Corundum