GATE CH format:mcq PYQs & Answers — Page 8

Questions 71–80 of 378. Imported answers require independent review unless marked reviewed.

A hot plate is placed in contact with a cold plate of a different thermal conductivity as shown in the figure. The initial temperature (at time

) of the hot plate and cold plate are

and

, respectively. Assume perfect contact between the plates.

Diagram for Chemical Engineering question 38

Which one of the following is an appropriate boundary condition at the surface S for solving the unsteady state, one-dimensional heat conduction equations for the hot plate and cold plate for

Your answerChoose one option.

Temperature at S is same for both the plates

Gradient of temperature at S is same for both the plates

Gradient of temperature vanishes at S

Temperature at S is the average of

and

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The first-order irreversible liquid phase reaction

occurs inside a constant volume (

) isothermal CSTR with the initial steady state conditions shown in the figure. The gain, in

, of the transfer function relating the reactor effluent

concentration,

, to the inlet flow rate,

, is

Diagram for Chemical Engineering question 39

Your answerChoose one option.

1.2

0.4

0.6

0.8

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500 mg of a dry adsorbent is added to a beaker containing 100 mL solution of concentration 100 mg phenol/(L solution). The adsorbent is separated out after 5 h of rigorous mixing. If the residual concentration in the solution after separating the adsorbent is 30 mg phenol/(L solution), the amount of phenol adsorbed (in mg per gram of dry adsorbent) is

Your answerChoose one option.

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A catalyst particle is modeled as a symmetric double cone solid as shown in the figure. For each conical sub-part, the radius of the base is

and the height is

. The sphericity of the particle is given by

Diagram for Chemical Engineering question 41

Your answerChoose one option.

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A zero-order gas phase reaction

with rate

mol/(L min) is carried out in a mixed flow reactor of volume 1 L. Pure A is fed to the reactor at a rate of 1 mol/min. At time

, the outlet flow is stopped while the inlet flow rate and reactor temperature remain unchanged. Assume that the reactor was operating under steady state before the flow was stopped (

). The rate of consumption of

, in mol/(L min), at

min is

Your answerChoose one option.

63.2

36.8

90.6

99.0

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If ‘→’ denotes increasing order of intensity, then the meaning of the words [simer → seethe → smolder] is analogous to [break → raze → ________]. Which one of the given options is appropriate to fill the blank?

Your answerChoose one option.

obfuscate

obliterate

fracture

fissure

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In a locality, the houses are numbered in the following way:

The house-numbers on one side of a road are consecutive odd integers starting from 301, while the house-numbers on the other side of the road are consecutive even numbers starting from 302. The total number of houses is the same on both sides of the road.

If the difference of the sum of the house-numbers between the two sides of the road is 27, then the number of houses on each side of the road is

Your answerChoose one option.

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For positive integers

and

, with

. Then,

Your answerChoose one option.

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Which one of the given options is a possible value of x in the following sequence?

3, 7, 15, x, 63, 127, 255

Your answerChoose one option.

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On a given day, how many times will the second-hand and the minute-hand of a clock cross each other during the clock time 12:05:00 hours to 12:55:00 hours?

Your answerChoose one option.

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GATE CH format:mcq PYQs

Question 38

Question 39

Question 40

Question 41

Question 42

Question 1

Question 2

Question 3

Question 4

Question 5