GATE CH format:mcq PYQs & Answers — Page 19

Questions 181–190 of 378. Imported answers require independent review unless marked reviewed.

A horizontal cylindrical water jet of diameter

cm strikes a vertical solid plate with a hole of diameter

cm, as shown in the figure. A part of the jet passes through the hole and the rest is deflected along the plate. The density of water is 100 kg m

. If the speed of the jet is 20 m s

, the magnitude of the horizontal force, in N, required to hold the plate stationary is

Diagram for Chemical Engineering question 38

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Consider a horizontal rod of radius

(

) in a stationary pipe of radius

. The rod is pulled coaxially at a constant velocity

as shown in the figure. The annular region is filled with a Newtonian incompressible fluid of viscosity

. The steady state fully developed axial velocity profile in the fluid is given by

, where

is the radial coordinate. Ignoring end effects, the magnitude of the pulling force per unit rod length is

Diagram for Chemical Engineering question 39

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Consider a bare long copper wire of 1 mm diameter. Its surface temperature is

and the ambient temperature is

(

). The wire is to be coated with a 2 mm thick insulation. The convective heat transfer coefficient is 20 W m

. Assume that

and

remain unchanged. To reduce heat loss from the wire, the maximum allowed thermal conductivity of the insulating material, in W m

, rounded off to two decimal places, is

Your answerChoose one option.

0.02

0.04

0.10

0.01

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Two large parallel plane walls are maintained at 1000 K and 500 K. Parallel radiation shields are to be installed between the two walls. Assume that the emissivities of the walls and the shields are equal. If the melting temperature of the shields is 900 K, the maximum number of shield(s) that can be installed between the walls is (are)

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Saturated steam condenses on a vertical plate maintained at a constant wall temperature. If

is the vertical distance from the top edge of the plate, then the local heat transfer coefficient

, where

is the local mass flow rate of the condensate per unit plate width. The ratio of the average heat transfer coefficient over the entire plate to the heat transfer coefficient at the bottom of the plate is

Your answerChoose one option.

4/3

3/4

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Match the product in Group-1 with the manufacturing process in Group-2. The correct combination is

Group-1		Group-2
P	Nitric acid	I	Tona process
Q	Phosphoric acid	II	Twitchell process
R	Potassium chloride	III	Ostwald’s process
S	Stearic acid	IV	Haifa process

Your answerChoose one option.

P-III, Q-I, R-IV, S-II

P-IV, Q-I, R-II, S-III

P-III, Q-IV, R-I, S-II

P-I, Q-IV, R-II, S-III

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The ratio of boys to girls in a class is 7 to 3. Among the options below, an acceptable value for the total number of students in the class is:

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A polygon is convex if, for every pair of points, P and Q belonging to the polygon, the line segment PQ lies completely inside or on the polygon. Which one of the following is NOT a convex polygon?

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Diagram for Chemical Engineering question 2

Diagram for Chemical Engineering question 2 (figure 2)

Diagram for Chemical Engineering question 2 (figure 3)

Diagram for Chemical Engineering question 2 (figure 4)

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Consider the following sentences: (i) Everybody in the class is prepared for the exam. (ii) Babu invited Danish to his home because he enjoys playing chess. Which of the following is the CORRECT observation about the above two sentences?

Your answerChoose one option.

(i) is grammatically correct and (ii) is unambiguous

(i) is grammatically incorrect and (ii) is unambiguous

(i) is grammatically correct and (ii) is ambiguous

(i) is grammatically incorrect and (ii) is ambiguous

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A circular sheet of paper is folded along the lines in the directions shown. The paper, after being punched in the final folded state as shown and unfolded in the reverse order of folding, will look like ______.