The main constituent of fly-ash, is
Aluminium oxide
Silica
Ferrous oxide
All of these
Correct Answer :
D. All of these
Related Questions
In brick masonry the bond produced by laying alternate headers and stretchers in each course is known as
English bond
Double Flemish bond
Zigzag bond
Single Flemish bond
Advantage of a clamp compared to a kiln for burning bricks is that
It takes less time for burning
It gives more output of first class bricks
It has less initial cost
It is suitable when bricks are required in large numbers
Which of the following metamorphic rocks has the most weather resisting characteristics?
Marble
Quartzite
Slate
Lime stone
The rocks formed by gradual deposition, are called
Sedimentary rocks
Igneous rocks
Metamorphic rocks
None of these
Which of the following is a rock?
Quartz
Mica
Gypsum
None of the above
The percentage of alumina in a good brick earth lies between
5 to 10 %
20 to 30 %
50 to 60 %
70 to 80 %
Plywood is made by bonding together thin layers of wood in such a way that the angle between grains of any layer to grains of adjacent layers is
0°
30°
45°
90°
The hardest rock is
Marble
Diamond
Talc
Quartz
Red short iron cracks when bent due to the presence of
Sulphur
Carbon
Phosphorus
Silicon
Le-Chatelier's device is used for determining the
Setting time of cement
Soundness of cement
Tensile strength of cement
Compressive strength of cement
Crushing strength of a good building stone should be more than
50 MPa
100 MPa
150 MPa
200 MPa
Upto a maximum of 72% of iron, is available in
Magnetite
Limonite
Siderite
Iron pyrites
Quick lime
Generates heat when added to water
Reacts with carbon dioxide
May be used for white-washing
All the above
The percentage of alumina and silica in good fire clay vary respectively is
25, 75
30, 70
35, 65
All of these
Non acid-resistant asbestos is:
Tremolite asbestos
Chrysotile asbestos
Amosite asbestos
None of these
The cement becomes unsound by the presence of excess
Sulphur
Magnesia
Lime
All of these
Pick up the correct statement from the following:
Soft stones are required for carving
Light stones are required for arches
Hard stones are required to stand high pressure
All the above
Based on flow quality, the sequence of pipes is
A.C. pipes, G.I. pipes, C.I. pipes, PVC pipes
C.I. pipes, G.I. pipes, A.C. pipes, PVC pipes
C.I. pipes, G.I. pipes, PVC pipes, A.C. pipes
None of these
The age of a tree can be known by examining
Cambium layer
Annular rings
Medullary rays
Heart wood
The harmonious mixing of the clay ingredients, is known as
Weathering
Blending
Tempering
None of these
The weight of a good quality brick when immersed in water for a period of 16 hours should not exceed the weight of dry brick
20 %
15 %
10 %
None of these
The rocks which are formed due to cooling of magma at a considerable depth from earth's surface are called
Plutonic rocks
Hypabyssal rocks
Volcanic rocks
Igneous rocks
Which one of the following is acid resistant asbestos?
Actinolite asbestos
Amosite asbestos
Anthophylite asbestos
All the above
The cracks which extend from bark towards the sap wood in the cross section of a tree, are called
Radial shakes
Star shakes
Heart shakes
Cup shakes
Putty is
Made with finely powdered chalk and linseed oil
Used for fixing glass panes
Softened by a solution of pearl ash and quick-lime soaked in water
All the above
Pick up the correct statement from the following:
Corrugated sheet iron is made by passing plain sheets between grooved rollers
Strength and stiffness of corrugated sheets are considerably increased
Corrugated sheets are generally used on slanting roofs
All the above
The moisture content in a well seasoned timber is
4 % to 6 %
10 % to 12 %
15 % to 20 %
100 %
Dry rot
Cracks the timber
Reduces the strength of timber
Reduces the timber to powder
Spoils the appearance of timber
Lime putty
Is made from hydraulic lime
Is made by adding lime to water
Can be used only upto three days
All of above
Initial setting time of cement for asbestos cement products should be not less than
30 minutes
50 minutes
75 minutes
90 minutes