Questions and answers for exam Preparation

MCQs

Total Questions : 1107 | Page 5 of 111 pages

If p is
the specific gravity of the material used in the design of a masonry dam
of triangular section, then the ratio between the height and base width
of the dam for structural safety and stability is equal to

`sqrt(2p)`
`sqrt(p)`
1/p
1/`sqrt(p)`

Discuss Question

Answer: Option B. -> `sqrt(p)`

Question 42.

The
ratio of the flexural strengths to two beams of square c. oss-section,
the first beam being placed with its top and bottom sides horizontally
and the second beam being placed with one diagonal horizontally, is

`sqrt(3)`
1/`sqrt(3)`
1/`sqrt(2)`
`sqrt(2)`

Discuss Question

Answer: Option D. -> `sqrt(2)`

Question 43.

The effective length of a fillet weld of length 'L' and size 's' is given by

L - `sqrt(s)`
L - 2s
L = `s/sqrt(2)`
L

Discuss Question

Answer: Option B. -> L - 2s

Question 44.
A vane shear test on a soil sample gives a moment of total resistance M. The shear stress at failure, 'S' being more of less uniform at top bottom and surface of cylinder of soil is given by (where H = height of vane, D = Diameter of vane)

S = `(2M)/(pi D^2H)`
S = `(2M)/(pi D^2(H +D))`
S = `(2M)/(pi D^2[(H + D)/(3)])`
S = `(2M)/(pi DH)`

Discuss Question

Answer: Option C. -> S = `(2M)/(pi D^2[(H + D)/(3)])`

Question 45.

If 'p' is the precipitation, 'a' is the area represented by a rainguage, and n is the number of raingauges in a catchment area, then the weighted mean rainfall is

`(Sigma a p^3)/(Sigma a^2)`
`(Sigma a p)/(n)`
`(Sigma a p)/(ap)`
`(Sigma a p^5)/(Sigma a^3)`

Discuss Question

Answer: Option C. -> `(Sigma a p)/(ap)`

Question 46.

In a laminar boundary layer, the velocity distribution can be assumed to be given, in usual notations, as`u/v`=`v/delta`

Which one of the following is the correct expression for the displacement thickness `delta**` for this boundary layer ?

`delta** = delta`
`delta** = delta/2`
`delta** = delta/4`
`delta** = delta/6`

Discuss Question

Answer: Option B. -> `delta** = delta/2`

Question 47.
Given that `varphi`is the angle of internal friction, `rho` is the safe
bearing capacity and `gamma`is the unit weight of soil, the minimum depth of
foundation of a masonry footing is given by

`p/y ((1 + sin varphi)/(1 - sin varphi))`
`p/y ((1 - sin varphi)/(1 + sin varphi))`
`p/y ((1 + sin varphi)/(1 - sin varphi))^2`
`p/y ((1- sin varphi)/(1 + sin varphi))^2`

Discuss Question

Answer: Option D. -> `p/y ((1- sin varphi)/(1 + sin varphi))^2`

Question 48.

Which one of the following can be a set of velocity components of a two-dimensional flow ?

` u = x + y and v = x^2 + y^2`
` u = x + y and v = x - y`
` u = xy and v `= `x/y`
` u = x^2 + y^2 and v = x^2 - y^2`

Discuss Question

Answer: Option B. -> ` u = x + y and v = x - y`

Question 49.

A star is
observed at its upper culmination when it is north of zenith. The
latitude of the place of observation is `30^circ`N and declination of the star
is `50^circ`N. The zenith distance of the star is

`10^circ`
`20^circ`
`40^circ`
`80^circ`

Discuss Question

Answer: Option B. -> `20^circ`

Question 50.

A centrifugal
pump is required to lift 2.8 cu.m.s of water to a height of 7.5 m. If
the total loss of head in the pipe system is 0.25 m and the efficiency
of the pump is 80%, then the brake horse power will be