The normal curing period for lime mortar, is:
1 day
3 days
7 days
10 days
Correct Answer :
C. 7 days
Related Questions
The stone suitable for rubble masonry should be.
Hard
Tough
Heavy
Light
The minimum percentage of silica, alumina and ferric oxide in lime for white washing, is
20
15
5
0
Sapwood consists of
Innermost annular rings around the pith
Portion of timber between heartwood and cambium layer
Thin layers below the bark
Thin fibre which extends from the pith outwards and holds the annular rings together
Assertion A : Paints with white lead base are not recommended for painting of iron works. Reason R : Paints with white lead base do not check rusting of iron. 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
Soundness test of cement determines
Quality of free lime
Ultimate strength
Durability
Initial setting
Cast iron is used for
Structural works in beams
Small sized water pipes
Columns and struts
None to these
The initial setting time for ordinary Portland cement as per IS specifications should not be less than
10 minutes
30 minutes
60 minutes
600 minute
Which one of the following is an air binding material?
Gypsum
Acid-resistant cement
Quick lime
All of these
Pick up the correct statement from the following:
Solder material is an alloy which melts at a temperature above 400°C
Brazing is done at temperature above 600°C to 1100°C
Brazing joint is stronger than the solder joint
All the above
The rocks which are formed due to pouring of magma at the earth's surface are called
Plutonic rocks
Hypabyssal rocks
Volcanic rocks
Igneous rocks
The pigment used in paints for corrosive resistance, is
White lead
Ferrous oxide
Zinc white
Red lead
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
In the method of condensation polymerization,
Low-molecular substances are removed from the high molecular substance
The reaction proceeds with an evolution of ammonia
The reaction proceeds with an evolution of hydrogen chloride
All of the above
Pick up the most favourable condition for the rapid growth of fungus for dry rot from the following:
Absence of sun light
Dampness
Presence of sap
All the above
Good quality cement contains higher percentage of
Tri-calcium silicate
Di-calcium silicate
Tri-calcium aluminate
Tetra calcium alumino ferrite
The stones obtained by blasting are used as
Ballast in railways
Aggregates for concrete
Road metal
All the above
A good quality stone absorbs water less than
5 %
10 %
15 %
25 %
Index number expressing the relative sizes of both coarse and fine aggregates, is called
Proportioning of aggregates
Fineness modulus
Grading of aggregates
None of these
For light and ornamental casting, the most unsuitable pig iron, is
Bessemer pig
Grey or foundry pig
White or forge pig
Mottled pig
If the iron ore contains clay as an impurity, the flux added during calcination, is
Clay
Lime stone
Argillaceous iron ore
All the above
The cast iron when heated to red heat with powdered red haematite in an oven for increasing its toughness, is converted to
Grey cast iron
White cast iron
Mottled cast iron
Toughed cast iron
In a rock calcium carbonate predominates. State whether it is:
Siliceous rock
Argillaceous rock
Calcareous rock
None of these
Mastic asphalt is generally used for
Damp proof course
Water proof layer
Partition walls
Both (A) and (B)
Glazing is used to make earthenware
Hard
Soft
Porous
Impervious
The variety of pig iron used for manufacture of wrought iron, is
Bessemer pig
Grey or foundry pig
White forge pig
Mottled pig
The most commonly used retarder in cement is
Gypsum
Calcium chloride
Calcium carbonate
None of the above
Refractory bricks are
Neutral refractory bricks
Acid refractory bricks
Basic refractory bricks
All the above
Water paint is a
White wash
Colour wash
Whiting
All the above
The low voltage porcelain is mainly used for
Switch block
Insulating tubes
Lamp sockets
All of these
A mortar joint in masonry which is normal to the face of wall is known as
Bed joint
Wall joint
Cross joint
Bonded joint