GATE ES year:2023 PYQs & Answers — Page 4

Questions 31–40 of 65. Imported answers require independent review unless marked reviewed.

The critical depth in a 2 m wide rectangular channel carry a discharge of 10 m³/s and take value of acceleration due to gravity (g) as 9.81 m/s² is ____________(in m, rounded off to two decimal places).

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The ratio of the moles of CO₂ evolved to the moles of O₂ consumed in respiration also called the respiratory quotient, is calculated for a carbohydrate (C₆H₁₂O₆) as substrate and found to be 1. Under similar conditions, for a fatty acid (C₅₁H₉₈O₆) as substrate, the respiratory quotient is _________ (rounded off to two decimal place).

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The value of

is __________ (rounded off to two decimal places).

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An S-hydrograph was prepared for a catchment of 240 km² using 3-hour unit hydrograph (1 cm rainfall excess). The equilibrium discharge for the S-hydrograph would be __________ (in m³/s, rounded off to two decimal places).

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River water containing two types of spherical suspended particles (clay particles, metal particles) is retained in a sedimentation tank. The clay particles having diameter of 75 μm and specific gravity of 2.65 is settling in the tank with a constant velocity. The velocity of clay particles is 2 times of that of metal particles having specific gravity of 8. Assume discrete settling and laminar flow conditions within the sedimentation tank. The estimated diameter of the metal particles is ________________ (in μm, rounded off to integer)

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W₁, W₂, W₃...W₉ represent the holding times of 9 water samples, which follow a normal distribution with mean = 8.33 and standard deviation = 4.472. M represents the sample mean value of holding times, which also has a normal distribution. Assuming Z has a standard normal distribution (mean = 0 and standard deviation = 1), select the correct statement which describes the expression for calculating the value of type 1 error where

null hypothesis (H₀): M > 6

alternate hypothesis (Hₐ): M ≤ 6

Your answerChoose one option.

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Which one of the following statements is NOT correct?

Your answerChoose one option.

Photophosphorylation is the synthesis of ATP from ADP and inorganic phosphate in the presence of light.

The process through which ATP is synthesised by cells (in mitochondria and chloroplasts) is called phosphorylation.

The Calvin cycle (carboxylation, reduction, and regeneration) occurs in all photosynthetic plants (C3, C4 or any other).

C3 plants have a special type of leaf anatomy, they tolerate higher temperatures, they show a response to high light intensities, have high rate of photosynthesis and reduced rate of photorespiration as compared to C4 plants.

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Read the following statements

I. Bacteriophage is an anaerobic bacterium.

II. Male-specific bacteriophage infect via the pili of other microorganisms including viruses.

III. Bacteriophage is found in human as well as in animal excreta.

IV. Bacteriophage can not indicate the presence of bacteria.

The correct choice is

Your answerChoose one option.

(I), (III) and (IV) are correct

(IV) is correct; (III) is incorrect

Both (II) and (IV) are incorrect

Both (II) and (IV) are correct

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Read the following statements

i. In endogenous metabolism by aerobic bacteria, electron acceptor is present inside the cells.

ii. In endogenous metabolism by aerobic bacteria, electron acceptor is dissolved oxygen.

iii. The endogenous metabolism is linked to fermentative metabolism.

iv. In exogenous metabolism by aerobic bacteria, enzyme mediated electron transfer happens within the cells.

The correct choice is

Your answerChoose one option.

(i) is correct; (ii) is correct

(ii) is correct; (iii) is incorrect

(iii) is incorrect; (iv) is incorrect

(iii) is correct; (iv) is correct

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A boiler in an industry, located where high plume rise is expected, releases flue gas with fine particulate matter. Which one of the following options is most suited and efficient if the particulate matter is intend for reuse?

Your answerChoose one option.

reduce stack height and increase stack diameter

use of wet collectors

use of flue gas desulfurization (FGD)

use of electrostatic precipitator (ESP)

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GATE ES year:2023 PYQs

Question 31

Question 32

Question 33

Question 34

Question 35

Question 36

Question 37

Question 38

Question 39

Question 40