500 Best Building Materials MCQ
Q313). Pegmatite is a/an
a).intrusive igneous rock
b).extrusive igneous rock
c).sedimentary rock
d).metamorphic rock.
Correct Answer:
intrusive igneous rock
Explanation:
Q314). The percentage of alumina and silica in good fire clay vary respectively is
a).25, 75
b).30, 70
c).35, 65
d).All of these.
Correct Answer:
25, 75
Explanation:
Q315). The term frog means
a).an apparatus to lift the stone
b).a depression on a face of brick
c).vertical joint in a brick work
d).soaking brick in water.
Correct Answer:
a depression on a face of brick
Explanation:
Q316). Asphalt is obtained from
a).petroleum distillation
b).bitumen distillation
c).plastic distillation
d).none of these.
Correct Answer:
petroleum distillation
Explanation:
Q317). To retard the initial setting time of cement, the compound responsible, is
a).Tricalcium silicate
b).Gypsum
c).Di-calcium silicate
d).Tri calcium aluminate.
Correct Answer:
Gypsum
Explanation:
Q318). Dorry’s testing machine is used for
a).crushing test of stone
b).hardness test of stone
c).impact test of stone
d).water absorption test.
Correct Answer:
hardness test of stone
Explanation:
Q319). Stones used for rubble masonry must be
a).soft
b).hard
c).light
d).heavy.
Correct Answer:
hard
Explanation:
Q320). Index number expressing the relative sizes of both coarse and fine aggregates, is called
a).proportioning of aggregates
b).fineness modulus
c).grading of aggregates
d).none of these.
Correct Answer:
fineness modulus
Explanation: