Civil Engineering - UPSC Civil Service Exam Questions

46. 

Consider the following strengths of concrete :
1. Cube strength
2. Cylinder strength
3. Split-tensile strength
4. Modulus of rupture
The correct sequence in decreasing order of these strengths is

A. 3, 4, 2, 1
B. 3, 4, 1, 2
C. 4, 3, 2, 1
D. 4, 3, 1, 2

Answer: Option D

Explanation:

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47. 

A reinforced concrete slab is 75 mm thick. The maximum size of reinforcement bar that can be used is

A. 12 mm diameter
B. 10 mm diameter
C. 8 mm diameter
D. 6 mm diameter

Answer: Option C

Explanation:

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48. 

Consider the following methods of preservation of timber :
1. Dipping
2. Brushing or spraying
3. Pressure impregnation
The correct sequence in decreasing order of the effectiveness of these methods of preservation is

A. 1, 2, 3
B. 2, 1, 3
C. 3, 1, 2
D. 3, 2, 1

Answer: Option C

Explanation:

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49. 

Purlins are provided, in industrial buildings, over roof trusses to carry dead loads, live loads and wind loads. As per IS code, what are they assumed to be ?

A. Simply supported
B. Cantilever
C. Continuous
D. Fixed

Answer: Option C

Explanation:

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50. 

Ratio of bearing capacity of double Under Reamed (U.R.) pile to that of single U.R. pile is nearly

A. 2
B. 1.5
C. 1.2
D. 1.7

Answer: Option B

Explanation:

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