Building Materials
Compared to mild steel, cast iron has
(i) High compressive strength
(ii) High tensile strength
(iii) Low compressive strength
(iv) Low tensile strength

(i) and (iv)
(iii) and (iv)
(i) and (ii)
(ii) and (iii)

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Building Materials
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:

A is true but R is false
A is false but R is true
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

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Building Materials
The basic purpose of a retarder in concrete is

To render the concrete more water tight
To improve the workability of concrete mix
To increase the initial setting time of cement paste in concrete
To decrease the initial setting time of cement paste in concrete

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