Civil Engineering Gate 2015 Set-2 Questions with Answer

Ques 14 GATE 2015 SET-2


Ultimate BOD of a river water sample is 20 mg/L. BOD rate constant (natural log) is 0.15 day-1. The respective values of BOD (in %) exerted and remaining after 7 days are:

A

45 and 55

B

55 and 45

C

65 and 35

D

75 and 25


(c) is the correct answer.

Ques 15 GATE 2015 SET-2


In a wastewater treatment plant, primary sedimentation tank (PST) designed at an overflow rate of 32.5 m3/day/m2 is 32.5 m long, 8.0 m wide and liquid depth of 2.25 m. If the length of the weir is 75 m, the weir loading rate (in m3/day/m) is _______.


(112.5) is the correct answer.

Ques 16 GATE 2015 SET-2


The relationship between the length scale ratio (Lr) and the velocity scale ratio (Vr) in hydraulic models, in which Froude dynamic similarity is maintained, is:

A

Vr = Lr

B

Lr = √Vr

C

Vr= Lr1.5

D

Vr = √Lr


(d) is the correct answer.

Ques 17 GATE 2015 SET-2


A nozzle is so shaped that the average flow velocity changes linearly from 1.5 m/s at the beginning to 15 m/s at its end in a distance of 0.375 m. The magnitude of the convective acceleration (in m/s2) at the end of the nozzle is _______.


(540) is the correct answer.

Ques 18 GATE 2015 SET-2


A hydraulic jump takes place in a frictionless rectangular channel. The pre-jump depth is yp. The alternate and sequent depths corresponding to yp are ya and ys respectively. The correct relationship among yp, ya and ys is:

A

ya < ys< yp

B

ya < ys< ya

C

yp < ys= ya

D

yp = ys= ya


(b) is the correct answer.

Ques 19 GATE 2015 SET-2


A triangular gate with a base width of 2 m and a height of 1.5 m lies in a vertical plane. The top vertex of the gate is 1.5 m below the surface of a tank which contains oil of specific gravity 0.8. Considering the density of water and acceleration due to gravity to be 1000 kg/m3 and 9.81 m/s2 respectively, the hydrostatic force (in kN) exerted by the oil on the gate is _______.


(29.4) is the correct answer.

Ques 20 GATE 2015 SET-2


The velocity components of a two dimensional plane motion of a fluid are: u = (y3 / 3) + 2x - x2y and v = xy2 - 2y - (x3 / 3). The correct statement is:

A

Fluid is incompressible and flow is irrotational.

B

Fluid is incompressible and flow is rotational.

C

Fluid is compressible and flow is irrotational.

D

Fluid is compressible and flow is rotational.


(a) is the correct answer.

Ques 21 GATE 2015 SET-2


A pipe of 0.7 m diameter has a length of 6 km and connects two reservoirs A and B. The water level in reservoir A is at an elevation 30 m above the water level in reservoir B. Halfway along the pipe line, there is a branch through which water can be supplied to a third reservoir C. The friction factor of the pipe is 0.024. The quantity of water discharged into reservoir C is 0.15 m3/s. Considering the acceleration due to gravity as 9.81 m/s2 and neglecting minor losses, the discharge (in m3/s) into the reservoir B is _______.


(0.57) is the correct answer.

Ques 22 GATE 2015 SET-2


Choose the most appropriate word from the options given below to complete the following sentence.
The official answered ______ that the complaints of the citizen would be looked into.

A

respectably

B

respectfully

C

reputably

D

respectively


(b) is the correct answer.

Ques 23 GATE 2015 SET-2


Choose the statement where underlined word is used correctly.

A

The minister insured the victims that everything would be all right.

B

He ensured that the company will not have to bear any loss.

C

The actor got himself ensured against any accident.

D

The teacher insured students of good results.


(b) is the correct answer.

Ques 24 GATE 2015 SET-2


Which word is not a synonym for the word vernacular?

A

regional

B

indigenous

C

indigent

D

colloquial


(c) is the correct answer.

Ques 25 GATE 2015 SET-2


Mr. Vivek walks 6 meters North-east, then turns and walks 6 meters South-east, both at 60 degrees to east. He further moves 2 meters South and 4 meters West. What is the straight distance in metres between the point he started from and the point he finally reached?

A

2√2

B

2

C

√2

D

1/√2


(a) is the correct answer.

Ques 26 GATE 2015 SET-2


Four cards are randomly selected from a pack of 52 cards. If the first two cards are kings, what is the probability that the third card is a king?

A

4/52

B

2/50

C

(1/52)x(1/52)

D

(1/52)x(1/51)x(1/50)


(b) is the correct answer.

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