A Best Way To Crack Gorenment Job Exams

Civil Engineering Objective Questions { Concrete Technology }



141.  Curing a concrete for long period ensures better
A. volume stability
B. strength
C. water resistance
D. all the above
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142.  Under normal conditions using an ordinary cement, the period of removal of the form work, is :
A. 17 days for beam soffits
B. 14 days for bottom slabs of spans 46 m and more
C. 21 days for bottom beams over 6 m spans
D. all the above
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143.  While compacting the concrete by a mechanical vibrator, the slump should not exceed
A. 25 cm
B. 50 cm
C. 75 cm
D. 10 cm
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144.  The maximum thickness of concrete floor of a cement warehouse, is
A. 10/cm
B. 15 cm
C. 20 cm
D. 25 cm
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145.  The shuttering of a hall measuring 4 m x 5 m, can be removed after
A. 5 days
B. 7 days
C. 10 days
D. 14 days
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146.  Pick up the correct statement from the following :
A. There should not be any loss of cement from the charged drum of the mixer
B. Cement should be mixed for at least one minute
C. 10% of water is placed in the rotating drum before adding dry material
D. All the above
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147.  If the effective working time is 7 hours and per batch time of concrete is 3 minutes, the output of a concrete mixer of 150 litre capacity, is
A. 15,900 litres
B. 16,900 litres
C. 17,900 litres
D. 18,900 litres
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