Civil Engineering - UPSC Civil Service Exam Questions

31. 

The depreciation charges for a machine are thirty paise per working hour. The machine has a scrap value of Rs 2, 000 and a working hour average life of 24000 hours. What is the purchase price of the machine ?

A. Rs. 1, 800
B. Rs. 7, 200
C. Rs. 9, 200
D. Rs. 14, 275

Answer: Option C

Explanation:

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32. 

Denehy's groyne is a special type of groyne which is :

A. Pointing upstream
B. Pointing downstream
C. Hockey type
D. T - headed

Answer: Option D

Explanation:

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33. 

As a natural material, timber is which one of the following ?

A. Isotropic
B. Anisotropic
C. Homogeneous
D. Heterogeneous

Answer: Option B

Explanation:

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34. 

Consider the implicit details between, before and after successive steps in/within the order while doing time computations on a CPM network. (FP => Forward Pass; BP => Backward Pass; LET => Late Event Time; EET => Early Event Time; TF => Total Float; PD => Project Duration; AD => Activity Duration)
The correct sequence of computation would be

A. EET, PD, LET, TF
B. EET, PD, LET, AD
C. AD, EET, BP, PD
D. FP, EET, TF, PD

Answer: Option C

Explanation:

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35. 

A retaining wall 8 m high with a smooth vertical back retains a clay back fill with C' = 15 kN/m2, φ = 15° and γ = 18 kN/ m3. (Given sin 15° ≅ 0.25). The pressure at the top will, nearly, be equal to

A. 35.2 kN/m2
B. 23.0 kN/m2
C. 27.6 kN/m2
D. 11.5 kN/m2

Answer: Option D

Explanation:

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