Which of the following cements is suitable for use in massive concrete structures such as large dams?
Ordinary Portland cement
Low heat cement
Rapid hardening cement
Sulphate resisting cement
Correct Answer :
B. Low heat cement
Related Questions
The colour of statuary marble used for sculptor's work, is
Red
Blue
White
Green
Which of the following sedimentary rocks changes into quartzite by metamorphic action?
Sand stone
Lime stone
Shale
Gypsum
Le-Chatelier's device is used for determining the
Setting time of cement
Soundness of cement
Tensile strength of cement
Compressive strength of cement
The commonly used thinner in oil paints, is
Naphtha
Turpentine
Both (a) and (b)
None the these
Quick lime
Generates heat when added to water
Reacts with carbon dioxide
May be used for white-washing
All the above
Pick up the correct statement from the following:
Rusting is caused due to combined action of air, moisture and carbon dioxide
During rusting, first ferrous bicarbonates are formed
On further oxidation ferrous bicarbonates get converted to ferric bicarbonates
All the above
The initial setting time of lime-pozzolana, is
30 minutes
60 minutes
90 minutes
120 minutes
For construction of structures under water, the type of lime used, is
Hydraulic lime
Fat lime
Quick lime
Pure lime
Pick up the correct statement from the following:
In stone arches, the stones are placed with their natural beds radial
In cornices, the stones are placed with their natural beds as vertical
In stone walls, the stones are placed with their natural beds as horizontal
All the above
Kaolin is chemically classified as
Metamorphic rock
Argillaceous rock
Calcareous rock
Siliceous rock
Age of a tree may be ascertained by
Radius of its stem
Circumference of its stem
Number of branches
Number of annual rings
A piece of timber whose thickness and width are respectively 5 cm and 10 cm is called
Slate
Plank
Board
Strip
Steel contains carbon approximately
1.50% to 5.6%
0.05% to 1.75%
0.25 %
None to these
Asbestos cement
Is brittle
Warps due to changes in humidity
Strength is lowered when saturated by water
All of the above
The proportions of lime and sand in the mortar normally used in brick construction are
1 : 2
1 : 4
1 : 6
1 : 8
The most important constituent of varnish, is
Drier
Solvent
Resin
All the above
Pick up the correct statement from the following:
Alexander Parkes, a Scottish chemist prepared a hard material by mixing camphor and alcohol with nitro cellulose and called it, as Parkesite
Dr. L. Bakeland, a Belgian scientist prepared a product known as Bakelite
Pollark, an Austrian scientist prepared a substance from urea and formaldehyde and called it Plastic
All the above
Which of the following represents a metamorphic rock? (i) Slate (ii) Shale (iii) Quartzite The correct answer is
Only (iii)
Both (i) and (iii)
Both (ii) and (iii)
All (i), (ii) and (iii)
Plywood is normally available
1 mm thick
2 mm thick
2 to 3 mm thick
3 mm to 4 mm thick
Minimum of 40% of iron, is available in
Magnetite
Red haematite
Limonite
Black band
The preparation of surface of stone to obtain plain edges or to obtain stones of required size and shape is known as
Quarrying of stones
Blasting of stones
Seasoning of stones
Dressing of stones
A badly mixed cement concrete results in
Segregation
Bleeding
Honey combing
None of these
Assertion A : Normally turpentine oil is recommended as thinner for indoor painting. Reason R : Turpentine oil is costlier than other thinners. Select your answer according to the coding system given below:
Both A and R is true and R is the correct explanation of A
Both A and R is true but R is not the correct explanation of A
A is true but R is false
A is false but R is true
When a brick is immersed in water for 24 hours and then dried, if
No grey or white deposits appear on the surface, the brick is free from soluble salts
10 percent surface is covered with grey or white deposits, the brick has slight efflorescence
50 percent surface is covered with grey or white deposits, the brick has serious efflorescence
All the above
The moisture content in a well seasoned timber is
4 % to 6 %
10 % to 12 %
15 % to 20 %
100 %
Pick up the correct statement regarding low heat cement from the following:
It possesses less compressive strength
Its initial setting time is about one hour
Its final setting time is about 10 hours
All the above
Asbestos is
Corrugated sheet used for roofing
An incombustible fire proof material
An organic substance
All the above
Granite mainly composed of quartz and feldspar particles, is obtained from
Sedimentary rocks
Metamorphic rocks
Igneous rocks
All the above
Dextrin is
Animal glue
Starch glue
Albumin glue
Rubber based adhesive
Wrought iron contains carbon upto
0.25 %
1.0 %
1.5 %
2 %