GATE Chemical Engineering** (CH)** Online Mock Test Online Free. This mock test having 25 questions in each subjects, with four choices. On each click on answers system will tell you where the answers is correct or incorrect. You can view this GATE CH test question details at the end of the quiz.

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## GATE Chemical Engineering Question Answers

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Question 1 |

The system has

a uniqne solution | |

no solution | |

an infinite number of solutions | |

only the trivial solution |

Question 2 |

A box containing 10 identical compartments has 6 red balls and 2 blue balls. Ti each compartment can hold only one ball, then the number of different possible arrangements are

1026 | |

1062 | |

1260 | |

1620 |

Question 3 |

If the temperature of saturated water is increased infinitesimally at constant entropy. the resulting state of water will be

Liquid | |

Liquid — vapor coexistence | |

Saturated vapor | |

Solid |

Question 4 |

For an exothermic reversible reaction. which one of the following correctly describes the dependence of the equilibrium constant (K) with temperature (T) and pressure (P)?

K is independent of T and P | |

K increases with an increase in T and P | |

K increases with T and decreases with P | |

K decreases with an increase in T and is independent of P |

Question 5 |

Water is flowing tinder laminar conditions in a pipe of length L. If the diameter of the pipe is doubled, for a constant volumetric flow rate, the pressure drop across the pipe

decreases 2 times | |

decreases 16 times | |

increases 2 tunes | |

increases 16 times |

Question 6 |

The local velocity of a fluid along a streamline can be measured by

Pitot tube | |

Venturi meter | |

Rotameter | |

Orifice meter |

Question 7 |

In a mixing tank operating at very high Reynolds number (> 1 O), if the diameter of the impeller is doubled (other conditions remaining constant), the power required increases by a factor of

1/32 | |

1/4 | |

4 | |

32 |

Question 8 |

For heat transfer across a solid-fluid interface. which one of the following statements is NOT true when the Biot number is very small compared to 1?

Conduction resistance in the solid is very small compared to convection resistance in the fluid | |

Temperature profile withimi the solid is nearly uniform | |

Temperature drop in the fluid is significant | |

Temperature drop in the solid is significant |

Question 9 |

In the McCabe-Thiele diagram, if the x -coordinate of the point of intersection of the q -line and the vapor-liquid equilibrium curve is greater than the x -coordinate of the feed point, then the quality of the feed is

super-heated vapor | |

liquid below bubble point | |

saturated vapor | |

saturated liquid |

Question 10 |

For which of the following combinations, does the absorption operation become gas-film controlled?
P. The solubility of gas in the liquid is veiy high
Q. The solubility of gas in the liquid is vely low
R. The liquid-side mass transfer coefficient is much higher than the gas-side mass transfer coefficient
S. The liquid-side mass transfer coefficient is much lower than tile gas-side mass transfer coefficient

P&Q | |

P&R | |

P&S | |

Q&R |

Question 11 |

The half-life of an n

^{th}order reaction in a batch reactor depends ononly the rate constant | |

only the rate constant and the order of the reaction | |

only the rate constant and the initial reactant concentration | |

the rate constant. initial reactant concentration, and the order of the reaction |

Question 12 |

In petroleum refining. catalytic reforming is used to convert

Paraffins and naphthenes to aromatics | |

Paraffins to hydrogen and carbon monoxide | |

Gas oil to diesel and gasoline | |

Light olefins to gasoline |

Question 13 |

The final boiling points of gasoline, diesel, atmospheric gas oil (AGO) and lubricating oils vary as

gasoline > diesel > AGO> lubricating oils | |

lubricating oils > AGO > diesel> gasoline | |

AGO > lubricating oils> diesel> gasoline | |

lubricating oils> diesel > AGO> gasoline |

Question 14 |

The main unit processes used for the production of hydrogen from natural gas are steam reforming (SR), pressure swing adsorption (PSA), low temperature water gas shift reaction (LT WOS) and high temperature water gas shift reaction (HT WGS). The correct sequence of these in the plant is

SR: LT WGS: HT WGS: PSA | |

PSA: SR: LT WGS: HT WOS | |

SR; HT WGS: LT WGS: PSA | |

PSA: HT WGS: LT WGS; SR |

Question 15 |

A thermometer initially at 100⁰C is dipped at t = 0 into an oil bath, maintained at 150⁰C. If the recorded temperature is 1 30⁰C after 1 minute, then the time constant of thermometer (in mm) is

1.98 | |

1.35 | |

1.26 | |

1.09 |

Question 16 |

The Bode stability criterion is applicable when

Gain and phase curves decrease continuously with frequency | |

Gain curve increases and phase curve decreases with frequency | |

Gain curve and phase curve both increase with frequency | |

Gain curve decreases and phase curve increases with freqiency |

Question 17 |

Heat is generated at a steady rate of 100 W due to resistance heating in a long wire (length = 5 in. diameter = 2 mm). This wire is wrapped with an insulation of thickness 1 mm that has a thennal conductivity of 0.1 W/m.K. The insulated wire is exposed to air at 30°C. The convective heat transfer between the wire and surrounding air is characterized by a heat transfer coefficient of 10 W/rn2.K. The temperature (in °C) at the interface between the wire and the insulation is

211.2 | |

242.1 | |

311.2 | |

484.2 |

Question 18 |

In a counter-flow double pipe heat exchanger, oil (iii = 2 kg/s. C,= 2.1 k3fkg.°C) is cooled from 90 °C to 40 °C by water (iii = 1 kg/s. C, = 4.2 kJ/kg.°C) which enters the inner tube at 10 °C. The radius of the inner tube is 3 cm and its length is 5 in. Neglecting the wall resistance. the overall heat transfer coefficient based on the inner radius, in kW/ m2.K, is

0.743 | |

7.43 | |

74.3 | |

2475 |

Question 19 |

An equimolar mixture of A and B (A being more volatile) is flash distilled continuously at a feed rate of 100 kmol/h, such that the liquid product contains 40 mol % of A. If the relative volatility is 6, then the vapor product, in kmol/h, is

10 | |

20 | |

25 | |

45 |

Question 20 |

A thermocouple having a linear relationship between 0 °C and 350 °C shows an emf of zero and 30.5 mV, respectively at these two temperatures. If the cold junction temperature is shifted from 0 °C to 30 °C, then the emf correction (in my) is

3.13 | |

2.92 | |

2.61 | |

2.02 |

Question 21 |

The characteristic equation for a system is
s

^{3}+9s^{2}+26s+12(2+K_{c}) = 0. Using the Routli test. the value of K_{c}that will keep the system on the verge of instability is20.9 | |

18.4 | |

17.5 | |

15.3 |

Question 22 |

Heat integration is planned in a process plant at an investment Rs. 2 x 10

^{6}. This would result in a net energy savings of 20 GJ per year. If the nomial rate of interest is 15% and the plant life is 3 years, then the breakeven cost of energy, in Rs. per GJ (adjusted to the nearest hundred), is33500 | |

43800 | |

54200 | |

65400 |

Question 23 |

In a 1-1 pass floating head type shell and tube heat exchanger. the tubes (od = 25 turn: id = 21 mm) are arranged in a square pitch. The tube pitch is 32 nun. The thermal conductivity of the shell side fluid is 0. 19 W/ni.K. and the Nusselt niunber is 200. The shell-side heat transfer coefficient (in W/ni2,K). rounded off to the nearest integer, is

1100 | |

1400 | |

1800 | |

2100 |

Question 24 |

If the flow rate of B is 2400 kg/h, then the theoretical number of stages in the column. using Kreiiiser s equation (adjusted to the next integer) is

5 | |

9 | |

11 | |

13 |

Question 25 |

If the exit concentration of A is 0.5 mole /liter, then the rate constant, in minˉ

^{1}is0.06 | |

0.28 | |

0.42 | |

0.64 |

Question 26 |

Which one of the following options is the closest in meaning to the word given below? Mitigate

Diminish | |

Divulge | |

Dedicate | |

Denote |

Question 27 |

Choose the most appropriate alternative from the options given below to complete the following sentence:
Suresh’s dog is the one ________ was hurt in the stampede.

that | |

which | |

who | |

whom | |

All of thses |

Question 28 |

A political party orders an arch for the entrance to the ground in which the annual convention is being held. The profile of tile arch follows tile equation y = 2x — 0. 1x

^{2}where y is the height of the arch in meters. The maximum possible height of tile arch is 8 meters | |

10 meters | |

12 meters | |

14 meters |

Question 29 |

‘%anted Temporary, Part-time persons for the post of Field Interviewer to conduct personal interviews to collect and collate economic data. Requirements: High School-pass. must be available for Day. Evening an(l Saturday work. Transportation paid. expenses telmnbursed.
Which one of the following is the best inference from the above advertisement

Gender-discriminatory | |

Xenophobic | |

Not designed to make time post attractive | |

Not gender-discriminatory |

Question 30 |

Given the sequence of terms, AD CG FK JP, the next term is

OV | |

OW | |

PV | |

PW |

Question 31 |

Which of the following assertions are CORRECT?
P: Adding 7 to each entry in a list adds 7 to the ineaii of the list
Q: Adding 7 to each ently in a list adds ‘ to the standard deviation of the list
R: Doubling each entry in a list doubles the iiiean of the list
S: Doubling each entry in a list leaves the standard deviation of the list unchanged

P, Q | |

Q, R | |

P, R | |

R, S |

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