The concrete may be accepted if the average equivalent cube strength of the core

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Question
The concrete may be accepted if the average equivalent cube strength of the cores, is at least 85% of the cube strength of the concrete grade at the specified age and no individual core possesses strength less than
Options
A. 90%
B. 85%
C. 80%
D. 75%
E. 70%

Correct Answer

75%

2. The thickness of the steel
Options
A. exposed to weather and accessible for repainting, should be not less than 6 mm
B. in main members not directly exposed to weather should not be less than 6 mm
C. in secondary members not directly exposed to weather shall be not less than 4.5 mm
D. All the above.

6. Pick up the correct statement from the following:
Options
A. The unit weight of plain concrete is assumed as 2400 N/m³
B. The unit weight of reinforced concrete is assumed as 2500 N/m³
C. The dead load includes self weight of the structural member plus weight of finishes and walls or partitions
D. All the above.

10. Pick up the correct statement from the following:
Options
A. The diameter of a rivet, before driving is taken as the nominal diameter of the rivet
B. The diameter of the rivet hole is taken as the gross area of the rivet
C. For rivets of nominal diameters less than 25 mm, the diameter of the rivet hole is taken as the nominal diameter of the rivet plus 1.5 mm
D. For rivets of nominal diameters exceeding 25 mm, the diameter of the rivet hole is taken as the nominal diameter of the rivet plus 2 mm
E. All the above.

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