0 of 15 questions completed
Click on Start Quiz button to take the Online test. Below are some articles to help you prepare for GATE exams.
You can install GATE Mobile App for unlimited online tests with answers.
Read my article on GATE exams for details of exam (eligibility criteria, format etc) and also post your questions or doubts.
Online tests and Books
My article on GATE Chemical Engineering provides details to crack the exam with ease ( free Online tests, recommended books, detailed syllabus).
You have already completed the quiz before. Hence you can not start it again.
Quiz is loading...
You must sign in or sign up to start the quiz.
You have to finish following quiz, to start this quiz:
0 of 15 questions answered correctly
Time has elapsed
You have reached 0 of 0 points, (0)
- Not categorized 0%
|Table is loading|
|No data available|
- Question 1 of 15
A wet solid of 100 kg is dried from a moisture content of 40 wt% to 10 wt%. The critical moisture content is 15 wt% and the equilibrium moisture content is negligible. All moisture contents are on dry basis. The falling rate is considered to be linear. It takes 5 hours to dry the material in the constant rate period. The duration (in hours) of the falling rate period isCorrectIncorrect
- Question 2 of 15
A brick wall of 20 cm thickness has thermal conductivity of 0.7 W /mK. An insulation of thermal conductivity 0.2 W /mK is to be applied on one side of the wall, so that the heat transfer through the wall is reduced by 75%. The same temperature difference is maintained across the wall before and after applying the insulation. The required thickness (in cm) of the insulation isCorrectIncorrect
- Question 3 of 15
An oil with a flow rate of 1000 kg/h is to be cooled using water in a double-pipe counter-flow heat exchanger from a temperature of 70 °C to 40 °C. Water enters the exchanger at 25 °C and leaves at 40 °C. The specific heats of oil and water are 2 kJ /kgK and 4.2 kJ/kgK, respectively. The overall heat transfer coefficient is 0.2 kW/mK. The minimum heat exchanger area (in m*m) required for this operation isCorrectIncorrect
- Question 4 of 15
A binary distillation column is operating with a mixed feed containing 20 mol% vapour. If the feed quality is changed to 80 mol% vapour, the change in the slope of the q-line isCorrectIncorrect
- Question 5 of 15
Match the following
Group 1 Group 2
P. Tank in series model I. Non-isothermal reaction
Q. Liquid-liquid extraction II. Mixer-settler
R. Optimum temperature progression III. PFR with axial mixing
S. Thiele modulus IV. Solid catalyzed reactionCorrectIncorrect
- Question 6 of 15
Two elemental gases (A and B) are reacting to form a liquid (C) in a steady state process as per the reaction A+ B→C . The single-pass conversion of the reaction is only 20% and hence recycle is used. The product is separated completely in pure form. The fresh feed has 49 mol% of A and B each along with 2 mol% impurities. The maximum allowable impurities in the recycle stream is 20 mol%. The amount of purge stream (in moles) per 100 moles of the fresh feed isCorrectIncorrect
- Question 7 of 15
A cash flow of Rs. 12,000 per year is received at the end of each year (uniform periodic payment) for 7 consecutive years. The rate of interest is 9% per year compounded annually. The present worth (in Rs.) of such cash flow at time zero isCorrectIncorrect
- Question 8 of 15
A polymer plant with a production capacity of 10,000 tons per year has an overall yield of 70%, on mass basis (kg of product per kg of raw material). The raw material costs Rs. 50,000 per ton. A process modification is proposed to increase the overall yield to 75% with an investment of Rs. 12.5 crore. In how many years can the invested amount be recovered with the additional profit?CorrectIncorrect
- Question 9 of 15
A step change of magnitude 2 is introduced into a system having the following transfer function
G(s) = 2 / (s*s + 2s + 4)
The percent overshoot isCorrectIncorrect
- Question 10 of 15
The bottom face of a horizontal slab of thickness 6 mm is maintained at 300 °C. The top face is exposed to a flowing gas at 30 °C. The thermal conductivity of the slab is 1.5 W/mK and the convective heat transfer coefficient is 30 W /m*mK. At steady state, the temperature (in °C) of the top face isCorrectIncorrect
- Question 11 of 15
In a steady incompressible flow, the velocity distribution is given by V = 3xiˆ − Pyˆj + 5zkˆ where V is in m/s and x, y, and z are in m. In order to satisfy the mass conservation, the value of the constant P (in s-1) isCorrectIncorrect
- Question 12 of 15
Match the following
Group 1 Group 2
P. Turbulence I. Reciprocating pump
Q. NPSH II. Packed bed
R. Ergun equation III. Fluctuating velocity
S. Rotameter IV. Impeller
T. Power number V. Vena contractaCorrectIncorrect
- Question 13 of 15
A process with transfer function,
G = 2 / (s – 1)
is to be controlled by a feedback proportional controller with a gain Kc. If the transfer functions of all other elements in the control loop are unity,
then which ONE of the following conditions produces a stable closed loop response?CorrectIncorrect
- Question 14 of 15
Determine the correctness or otherwise of the following Assertion [a] and Reason [r].
Assertion: Significant combustion of coke takes place only if it is heated at higher temperature in presence of air.
Reason: C + O2 → CO2 is an exothermic reaction.CorrectIncorrect
- Question 15 of 15
Match the raw materials of Groups 1 and 2 with the final products of Group 3
Group 1 Group 2 Group 3
P1: Ethylene Q1: Ammonia R1: Synthetic fibre
P2: Propylene Q2: 1-Butene R2: Nylon 66
P3: Adipic acid Q3: Ethylene glycol R3: LLDPE
P4: Terephthalic acid Q4: Hexamethylene diamine R4: AcrylonitrileCorrectIncorrect