MyQuestionIcon

Composition a...

Composition and Manufacture and Uses of Cement

Trending Questions

Q.

For a good quality of cement, the ratio of silica to alumina is

3:1
6:1
4:3
3:4

drop_down_image

Q. Which one of the following is an important ingredients of Portland cement?

Dicalcium silicate
(a) and (b) above.
Tricalcium aluminate
Monocalcium silicate

drop_down_image

Q.

Setting of cement is an example of:

drop_down_image

Q.

By adding gypsum to cement
(a) setting time of cement becomes less
(b) setting time of cement increases
(c) colour of cement becomes light
(d) shining surface is obtained

drop_down_image

Q. Which of the following compounds of cement sets at the slowest rate?

Tetracalcium alumininoferrit
Dicalcium silicate
Tricalcium aluminate
Tricalcium silicate

drop_down_image

Q.

Hydraulic mortar is prepared by heating a mixture of

Limestone and clay containing alumina
Limestone and sand
Magnesite and clay
Magnesite and sand

drop_down_image

Q. Gypsum is added to clinker during cement manufacturing to:

Decrease the rate of setting of cement
Facilitate the formation of colloidal gel
Bind the particles of calcium silicate
All of the above

drop_down_image

Q. The average composition of Portland cement is:

$C a O : 50 %$ , $S i O_{2} : 50 %$
$C a O : 40 - 50 %$ , $S i O_{2} : 30 - 40 %$ , $A l_{2} O_{3}$ and $F e_{2} O_{3} : 10 - 20 %$
$C a O : 50 - 60 %$ , $S i O_{2} : 20 - 25 %$ , $A l_{2} O_{3} : 5 - 10 %$ , $M g O : 2 - 3 %, F e_{2} O_{3} : 1 - 2 %$ and $S O_{3} : 1 - 2 %$
$S i O_{2} : 40 - 50 %$ , $C a O : 30 - 40 %$ , $A l_{2} O_{3} : 10 - 20 %$

drop_down_image

Q. A mixture of slaked lime, sand and water is known as ______.

lime mortar
portland cement
milk of lime
alabaster

drop_down_image

Q. A major constituent of Portland cement (except lime) is

Silica
Alumina
Magnesia
Iron oxide

drop_down_image

Q. What does RCC stands for?

Reinforced Carbon Cement
Regenerative Concrete Cement
Reinforced Cement Concrete
Reinforced Core Concrete

drop_down_image

Q. What is the mixture of MgCl₂ and MgO is called?

drop_down_image

Q. Gypsum is added to Portland cement to:

fasten the process of setting
slow down the process of setting
improve the colour of the cement
increase the melting point of cement

drop_down_image

Q. A mixture of cement, gravel, coarse sand and water is called:

mortar
concrete
slurry
hardner

drop_down_image

Q. For the manufacture of cement various steps are given below. Arrange the steps in a proper sequence.

(a) Clinker formation (b) Crushing
(c) Addition of gypsum (d) Mixing of raw materials
(e) Grinding to fine powder (f) Calcination in rotary kiln

d c a f e b
d b f a c e
a b c d e f
b d f c e a

drop_down_image

Q. Cement is formed by burning of _________ in a hot kiln.

limestone and clay
limestone and graphite
chalk and graphite
sulphur and limestone

drop_down_image

Q. Important constituent of Portland and high alumina cements is?

$C a_{3} A l_{2} O_{6}$
$C a S O_{4} .2 H_{2} O$
$C a S i O_{3}$
$F e_{2} C O_{3}$

drop_down_image

Q. Gypsum is added to cement clinker to:

facilitate the formation of colloidal gel
decrease the rate of setting of cement
bind the particles of calcium silicate
increase the tensile strength of the cement

drop_down_image

Q. Which of the following is/are the raw materials used to manufacture cement?

Clay
Limestone
Calcium sulphate
Slaked lime

drop_down_image

Q. Sorel cement is the mixture of:

$C a C O_{3} + H_{2} O$
$M g C l_{2} + M g O$
$B a S O_{4} + C O_{2}$
$M g O + N a_{2} H P O_{4}$

drop_down_image

Q. Portland cement does not contain:

$C a_{3} (P O_{4})_{2}$
$C a_{2} S i O_{3}$
$C a_{3} A l_{2} O_{6}$
$C a_{2} S i O_{4}$

drop_down_image

Q. The main constituents of cement are:

calcium oxide, silicon dioxide, aluminium oxide
none of these
magnesium oxide, silicon dioxide, aluminium oxide
calcium oxide, Iron oxide, sulphur dioxide

drop_down_image

Q. Dead burnt plaster is :

$C a S O_{4}$
$C a S O_{4} .12 H_{2} O$
$C a S O_{4} . H_{2} O$
$C a S O_{4} .2 H_{2} O$

drop_down_image

Q. The main constituent of cement is:

$S i O_{2}$
CaO
$C a S O_{4}$
$A l_{2} O_{3}$

drop_down_image

Q. Gypsum is added to cement to:

improve the texture of cement
make the mixture more homogeneous
make the cement light weight
delay the setting time of cement

drop_down_image

Q. Limestone sand, gypsum, and coal dust are the materials required for the manufacture of cement.

True
False

drop_down_image

Q. In what ratio are the mixture of cement, gravel and sand mixed to form concrete?

$1 : 2 : 4$
$1 : 3 : 6$
Both $A$ and $B$
$1 : 1 : 1$

drop_down_image

Q. Portland cement is not used in:

manufacture of bricks
manufacture of pipes, beams
manufacture of railroad ties
manufacture of rails

drop_down_image

Q. Raw materials used for the manufacture of Portland cement are:

gypsum and limestone
limestone and clay
alumina, clay and gypsum
gypsum and clay

drop_down_image

Q. Mixture of

M g C l_{2}

and

M g O

is called

Portland cement
Sorrel’s salt
Double salt
none

drop_down_image