Question-Answer:

The levelling is carried out between two stations P and Q separated by 1000 m. The Back Sight (BS) reading is noted as 0.70 m on station P, whose BM is 240.00 m. Next, the Fore Sight (FS) reading is taken on an intermediate point and the value is 1.25 m. Then the instrument is shifted to a new location and BS is taken on intermediate point as 0.85 m. Finally, the FS reading is taken on station Q as 1.10 m. What is the Reduced Level of Q?

• (a) 239.20 m
  
• (b) 240.80 m
  
• (c) 241.25 m
  
• (d) 241.80 m

Ans. (a)

so R.L. of Q

POINTS	BS	FS	HI	RL
P	.7		240.7	240
INTERMEDIATE	.85	1.25	240.3	239.45
Q		1.1		239.2

239.20m

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Question-Answer:

A line AB between the stations A and B was measured as 348.28 m using a 20 m tape, too short by 0.05 m. What is the correct length of line AB?

• (a) 349.15 m
  
• (b) 348.41 m
  
• (c) 347.41 m
  
• (d) 346.15 m

Ans. (c)

giver
Designated length of tape L = 20m Incorrect length of tape,L' = 20 - .05 = 19.95 Measured length of line AB l' = 248.28 m
Let, True length of AB = l As we know, l×L = L'×l' = 20 × l = 248.28 × 19.95 = 347.41

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Question-Answer:

Which one of the following consists of horizontal and vertical location of certain points by linear and angular measurements and is made to determine the natural features of a country?

• (a) Cadastral survey
  
• (b) Topographical survey
  
• (c) Astronomical survey
  
• (d) Military survey

Ans. (b)

1
Topographical survey consists of horizontal and vertical location of certain points by linear and angular measurement and is made to determine the natural features of a country such as rivers, streams, lakes hills etc. and artificial features as roads, railways, canals, towns and villages.

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Which one statements is NOT correct - Trigonometric leveling used in geodetic surveying

Question-Answer:

Which one of the following statements is NOT correct?

• (a) Trigonometric levelling has never been used in geodetic surveys
  
• (b) The differences in elevation are determined indirectly by trigonometric levelling
  
• (c) The electronic distance measurement devices can be used for measuring the vertical distances
  
• (d) The combined effects of curvature and refraction produce vertical readings that are slightly too short

Ans. (a)

1
Trigonometric leveling is used in geodetic surveying, particularly in areas where traditional leveling methods are not feasible or practical, such as in mountainous regions or areas with dense vegetation.

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Dip fault is a fault plane parallel to the dip of beds

Question-Answer:

 Dip fault is a fault plane

• (a) parallel to the dip of beds
  
• (b) parallel to the strike of a bedding plane
  
• (c) diagonal to the dip of a bedding plane
  
• (d) with no relationship to the bedding plane

Ans.(a)

Dip fault runs parallel to the dip of the bed, cut across the strike of the bed.
It is a fault that runs perpendicular to the strike of the affected rocks.
i.e. parallel to the plane of the angle of dip of the rocks

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Correct statement sub-surface investigation: To establish the geological profile.To establish Hydrogeological conditions

Question-Answer:

Consider the following objectives related to the sub-surface investigation:

1. To establish the geological profile.
2. To establish Hydrogeological conditions.
3. To monitor future changes in ground conditions through instrumentation. 

Which of the above objectives are correct?

• (a) 1 and 2 only
  
• (b) 2 and 3 only
  
• (c) 1 and 3 only
  
• (d) 1, 2 and 3

Ans. (d)

Objectives of sub-surface investigation:
1. To establish the geological profile. 2. To determine engineering properties for the various unit within the eventual ground model. 3. To establish hydrogeological conditions. 4. To monitor future changes in ground condition through instrumentation.

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Which one of the following statements is NOT correct porosity rock grains size and shape and mechanical processes

Question-Answer:

Which one of the following statements is NOT correct?

• (a) The porosity of rock depends upon size and shape of the rock grains
  
• (b) Specific gravity is useful for calculating the rock over burden stress
  
• (c) The porosity does not depend on rock mechanical processes
  
• (d) The porosity of spherical rock grains is high in case of cubic packing

Ans. (c)

1
Porosity of a rock depends upon grain size distribution, shape, the presence of cement between the grains developed to different degrees. The porosity of spherical rock grain is high is case of cubic packing.

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Question-Answer:

Which one of the following is the part of assumptions made by Terzaghi while developing the mathematical statement of the consolidation process?

• (a) The soil is non-homogeneous
  
• (b) The soil particles and water are incompressible
  
• (c) The partial deformation of soil is due to partial change in volume
  
• (d) Coefficient of permeability is variable during consolidation

Ans. (b)

• Soil is homogeneous. • Soil is fully saturated. • Solid particles are incompressible. • Compression and flow are one dimensional. • Strains in the soil are relatively small. • Darcy’s law is valid. • Coefficient of permeability and coefficient of volume compressibility remains constant.

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Which one of the following is a correct general consideration for a mechanically stabilized earth wall failure? - CIVIL ENGINEERING

Question-Answer:

Which one of the following is a correct general consideration for a mechanically stabilized

earth wall failure?

• (a) Compression in reinforcement
• (b) Bearing capacity  failure
• (c) Shearing in the wall
• (d) Partly sliding of wall soil

Ans. (b)

Mechanically stabilized earth wall failure.

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Question-Answer:

Which one of the following is an assumption made by Coulomb in the development of his earth pressure theory for sand and for active state?

• (a) The rupture surface is non-uniform surface 
• (b) There is a wall friction on the pressure surface 
• (c) Failure is three dimensional 
• (d) The soil is cohesive 

 Ans. (b)

Assumptions of Coulomb’s theory:

• 1. Soil is homogeneous, isotropic, semi infinite, dry and cohesion-less. 
• 2. Face of wall in contact with backfill is vertical or inclined and is rough. 
• 3. The failure wedge acts as a rigid body and stresses over it are uniform distributed. 
• 4. The failure is essentially 2D and rupture surface is planer which passes from heel of the wall. 
• 5. The location and direction of resultant thrust is known which passes from lower third point of the wall by assuming triangular distribution of earth pressure. 
• 6. Wedge failure is considered which is under equilibrium.

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