section 14

Question 1

The compressive strength of cement should not
be less than about 110Kg/cm2 after three days &
not less than 170Kg/cm2 after seven days. The
fineness of an ordinary cement as determined by
turbidimetric method should be about __________
cm2/gm.
a. 800
b. 1600
c. 4000
d. 8500

Answer 1

b

Question 2

Which of the following is not present in bagasse
fibre?
a. Cellulose
b. Lignin
c. Pentogens
d. None of these

Answer 2

d

Question 3

Nitric acid is not used in the manufacture of
a. detergents
b. fertilisers
c. aqua regia
d. Explosives.

Answer 3

a

Question 4

Naphthols are derivates of
a. methyl amine
b. naphthalene
c. phenol
d. Xylene

Answer 4

b

Question 5

Dechlorination of treated water is necessary to
a. remove residual turbidity.
b. reduce the bacterial load on filter.
c. control taste and odour.
d. remove chlorinous taste.

Answer 5

d

Question 6

Fermentation is adversely affected by the
a. presence of air.
b. absence of air.
c. high concentration.
d. presence of ammonium salts.

Answer 6

c

Question 7

Extraction of __________ employs an
electrolytic process.
a. aluminium
b. silver
c. copper
d. all (a), (b) and (c)

Answer 7

a

Question 8

Fire clay is __________ refractory material.
a. a basic
b. an acidic
c. a neutral
d. not a

Answer 8

b

Question 9

Production of one ton of cement requires about
__________ tons of limestone.
a. 0.6
b. 1.2
c. 2.2
d. 3.8

Answer 9

b

Question 10

An oil is converted into fat by its
a. hydrogenation
b. hydrolysis
c. hydrocracking
d. Hydration

Answer 10

a

Question 11

Low temperature carbonisation of coal takes
place at __________ °C.
a. 300
b. 1100
c. 700
d. 900

Answer 11

c

Question 12

Shaving soaps are
a. soft potassium soaps (potassium salt of
fatty acid) with free stearic acid to give
lather a lasting property.
b. metalic soaps compounded with frothing
agents.
c. high free alkali soaps having excess of cane
sugar and alcohol.
d. none of these

Answer 12

a