A Best Way To Crack Gorenment Job Exams

Civil Engineering Objective Questions { Concrete Technology }

239.  Strength of concrete with passage of time
A. increases
B. decreases
C. fluctuates
D. remains constant
Discuss in Forum

240.  Concrete gains strength due to
A. chemical reaction of cement with sand and coarse aggregates
B. evaporation of water from concrete
C. hydration of cement
D. All the above
Discuss in Forum

241.  Pick up the correct statement the following:
A. Ordinary portland cement is susceptible to the attack of magneisum sulphate
B. In set-cement, sulphates reactwiththe free calcium hydroxide to form calcium sulphate
C. Solid sulphates do not attck the cement compound
D. all the above
Discuss in Forum

242.  For the preparaton of lowheat cement, the contents of
A. C3S and C3A are reduced and content of C2S is increased
B. C2S and C3S are reduced and content of C3S is increased
C. C3A and C2S are reduced and that of C3S is increased
D. C2S, C3S and C3A are reduced
Discuss in Forum

243.  Vicat apparatus is not sued for
A. normal consistency test of cement
B. initial setting time of cement
C. final seting time of cement
D. compressive strength of cement
Discuss in Forum

244.  Pick up the wrong specification of Vicat apparatus from the following:
A. Diameter of Vicat mould-80 mm
B. Height of Vicat mould-40 mm
C. Diameter of the Vicat plunger -10 mm
D. Length of the Vicat plungr-50 mm
Discuss in Forum

245.  The initial setting time of ordinary port land cement should be:
A. 30 minutes
B. less than 30 minutes
C. more than 30 minutes
D. None of the above
Discuss in Forum

Page 35 of 39

« 33 34  35  3637 »