GATE CE discipline:civil-and-environmental-engineering PYQs & Answers — Page 18

Questions 171–180 of 1300. Imported answers require independent review unless marked reviewed.

Fecal Coliform (FC) concentration in river water was measured as 10780 cfu/100 ml. The FC concentration after the conventional water treatment, but before chlorination, was measured as 23 cfu/100 ml. The ‘Log Kill’ (inactivation) of FC due to the conventional water treatment is closest to

Your answerChoose one option.

4.00

2.50

2.67

3.00

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Consider a velocity vector,

in (x, y, z) coordinates given below. Pick one or more CORRECT statement(s) from the choices given below.

Your answerSelect all correct options. You can choose more than one.

z-component of Curl of velocity;

Divergence of velocity;

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A hydrocarbon (CₙHₘ) is burnt in air (O₂ + 3.78N₂). The stoichiometric fuel to air mass ratio for this process is

Note: Atomic Weight: C(12), H(1)

Effective Molecular Weight: Air(28.8)

Ignore any conversion of N₂ in air to the oxides of nitrogen (NOₓ)

Your answerChoose one option.

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Given that A and B are not null sets, which of the following statements regarding probability is/are CORRECT?

Your answerSelect all correct options. You can choose more than one.

P(A∩B) = P(A) P(B), if A and B are mutually exclusive.

Conditional probability, P(A|B) = 1 if B ⊂ A.

P(A∪B) = P(A) + P(B), if A and B are mutually exclusive.

P(A∩B) = 0, if A and B are independent.

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All the vehicles that come during a particular peak hour come during a 10-minute period within this hour. The 15-minute peak hour factor for this peak hour is

Your answerChoose one option.

0.25

0.167

0.75

1.0

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In the context of construction materials, which of the following statements is/are CORRECT?

Your answerSelect all correct options. You can choose more than one.

If the characteristic strength is defined as that value below which not more than 50% results are expected to fall, the target mean strength in mix design will be taken same as the characteristic strength irrespective of the degree of quality control at the site.

Ten percent fines value is a non-dimensional quantity.

The stress-strain curve of concrete for 1-day duration of loading is associated with a smaller secant modulus of elasticity compared to the stress-strain curve of the same concrete for 10-minutes duration of loading.

The increase of carbon in steel usually leads to an increase in its 0.2% proof stress.

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In the context of testing bitumen, which one of the following statements is FALSE:

Your answerChoose one option.

The depth of penetration of needle in the standard penetration test is measured in the units of one-tenth of millimeter

Softening point is measured using a ring and ball apparatus

Softening point is measured in the units of time

Ductility is measured in the units of length

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Which of the following statements is/are INCORRECT?

Your answerSelect all correct options. You can choose more than one.

As the depth of the ground water table from the ground surface increases, the effective stress in the soil decreases.

Bulking of the moist sand is due to the capillary action in the sand.

The effective stress in a liquified soil is almost zero.

The earth pressure at any point in the soil, under all conditions, is always smaller than the vertical effective stress at that point.

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The maximum degree of the curve that can be used for rails in a mountainous region is

Your answerChoose one option.

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Pick one or more CORRECT statement(s) from the choices given below, in the context of upstream and downstream cut-offs provided below the concrete apron of weirs / barrages constructed across alluvial rivers.

Your answerSelect all correct options. You can choose more than one.

Cut-offs are provided to increase the rate of flow over the weir / barrage.

Cut-offs are provided to increase the seepage length and prevent failure due to piping.

The bottom level of cut-offs mainly depends on the scour depth.

Cut-offs are provided to ensure occurrence of hydraulic jump within the stilling basin.

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GATE CE discipline:civil-and-environmental-engineering PYQs

Question 21

Question 21

Question 22

Question 22

Question 23

Question 23

Question 24

Question 24

Question 25

Question 25