GATE CE purpose:exam-prep PYQs & Answers — Page 39 — Exam Papers

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Questions 381–390 of 1300. Imported answers require independent review unless marked reviewed.

Topic practice 1300 questionsPage 39 of 130

A water treatment plant treats 25 MLD water with a natural alkalinity of 4.0 mg/L (as CaCO₃). It is estimated that, during coagulation of this water, 450 kg/day of calcium bicarbonate (Ca(HCO₃)₂) is required based on the alum dosage.

Consider the atomic weights as: Ca-40, H-1, C-12, O-16.

The quantity of pure quick lime, CaO (in kg) required for this process per day is__________ (rounded off to 2 decimal places).

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An organic waste is represented as C

O

H

N

S.

(Atomic weights: S-32, H-1, C-12, O-16, N-14).

Assume complete conversion of S to SO

while burning.

SO

generated (in grams) per kg of this waste is __________ (rounded off to 1 decimal place).

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The number of trains and their corresponding speeds for a curved Broad Gauge section with 437 m radius, are

• 20 trains travel at a speed of 40 km/hr • 15 trains travel at a speed of 50 km/hr • 12 trains travel at a speed of 60 km/hr • 8 trains travel at a speed of 70 km/hr • 3 trains travel at a speed of 80 km/hr

If the gauge (center-to-center distance between the rail heads) is taken as 1750 mm, the required equilibrium cant (in mm) will be ____________ (rounded off to the nearest integer).

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A horizontal curve of radius 1080 m (with transition curves on either side) in a Broad Gauge railway track is designed and constructed for an equilibrium speed of 70 kmph. However, a few years after construction, the Railway Authorities decided to run express trains on this track. The maximum allowable cant deficiency is 10 cm.

The maximum restricted speed (in kmph) of the express trains running on this track is ______________ (rounded off to the nearest integer).

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The figure presents the trajectories of six vehicles within a time-space domain. The number in the parentheses represents unique identification of each vehicle.

Diagram for Civil Engineering question 63

The mean speed (in km/hr) of the vehicles in the entire time-space domain is ______________ (rounded off to the nearest integer).

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A vertical summit curve on a freight corridor is formed at the intersection of two gradients, +3.0% and −5.0%.

Assume the following: Only large-sized trucks are allowed on this corridor Design speed = 80 kmph Eye height of truck drivers above the road surface = 2.30 m Height of object above the road surface for which trucks need to stop = 0.35 m Total reaction time of the truck drivers = 2.0 s Coefficient of longitudinal friction of the road = 0.36 Stopping sight distance gets compensated on the gradient

The design length of the summit curve (in meters) to accommodate the stopping sight distance is __________ (rounded off to 2 decimal places).

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The following data is obtained from an axle load survey at a site:

Average rear axle load = 1200 kg Number of commercial vehicles = 800 per day

The pavement at this site would be reconstructed over a period of 5 years from the date of survey. The design life of the reconstructed pavement is 15 years. Use the standard axle load as 8160 kg and the annual average vehicle growth rate as 4.0%. Assume that Equivalent Wheel Load Factor (EWLF) and Vehicle Damage Factor (VDF) are equal.

The cumulative standard axle (in msa) for the pavement design is __________ (rounded off to 2 decimal places).

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A child walks on a level surface from point P to point Q at a bearing of 30°, from point Q to point R at a bearing of 90° and then directly returns to the starting point P at a bearing of 240°. The straight-line paths PQ and QR are 4 m each. Assuming that all bearings are measured from the magnetic north in degrees, the straight-line path length RP (in meters) is ______________ (rounded off to the nearest integer).

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A bird is resting on a point P at a height of 8 m above the Mean Sea Level (MSL). Upon hearing a loud noise, the bird flies parallel to the ground surface and reaches a point Q which is located at a height of 3 m above MSL. The ground surface has a falling gradient of 1 in 2. Ignoring the effects of curvature and refraction, the horizontal distance (in meters) between points P and Q is ______________ (in integer).

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Differential leveling is carried out from point P (BM: +200.000 m) to point R. The readings taken are given in the table.

| Points | Back Sight (m) | Fore Sight (m) | Remarks | | P | (−)2.050 | | BM: +200.000 m | | Q | 1.050 | 0.950 | Q is a change point | | R | | (−)1.655 | |

Reduced Level (in meters) of the point R is ____ (rounded off to 3 decimal places).

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