MCQs Gate Chemical Engineering

1. Choose the word most similar in meaning to the given word:
Educe
(a) Exert                                                          
(b) Educate
(c) Extract                                                       
(d) Extend                                                          
Ans.(c)
2. Choose the most appropriate word from the options given below to complete the following sentence.
The principal presented the chief guest with a ----------, as token of appreciation.
(a) momento                                                              
(b) memento
(c) momentum                                                           
(d)moment                                 
Ans.(b)
3. Choose the appropriate word/phrase,out of the four options given below, to complete the following  sentence:
Frogs__________
(a) Croak                                                        
(b) Roar
(c) Hiss                                                          
(d) Patter                                                    
Ans.(a)
4.  A cube of side 3 units is formed using a set of smaller cubes of side 1 unit. Find the proportion of the number of faces of the smaller cubes visible to those which are NOT visible.
(a) 1:4                                                          
(b) 1:3
(c) 1:2                                                           
(d) 2:3                                                             
Ans.(c)
5. Humpty Dumpty sits on a wall every day while having lunch. The wall sometimes breaks. A person sitting on the wall falls if the wall breaks.
Which one of the statement below is logically valid and can be inferred from the above sentence?
(a) Humpty and Dumpty always falls while having lunch
(b) Humpty Dumpty does not fall sometimes while having lunch
(c) Humpty Dumpty never falls during dinner
(d) When Humpty Dumpty does not sit on the wall, the wall does not break                   
Ans.(b)
6. The following question presents a sentence, part of which is underlined. Beneath the sentence you find four ways of phrasing the underline part. Following the requirement of the standard written English, select the answer that produces the most effective sentence. Tuberculosis, together with its effects, ranks one of the leading causes of death in India.
(a) ranks as one of the leading causes of death
(b) rank as one of the leading causes of death
(c) has the rank of one of the leading causes of death
(d) are one of the leading causes of death                                                                                       
Ans.(a)
7. Benzene is removed from air by absorbing it in a non- volatile wash-oil at 100 kPa in a countercurrent gas absorber. Gas flow rate is 100mol/min, which includes 2mol/min of benzene. The flow rate of wash-oil is 50mol/min. Vapour pressure of benzene at the column conditions is 50kPa. Benzene forms an ideal solution with the wash-oil and the column is operating at steady state. Gas phase can be assumed to follow ideal gas law. Neglect the change in molar flow rated of liquid and gas phases inside the column’.
For this process, the value of the absorption factor (up to two decimal places)is_________.
(a) 1.02                               
(b) 6.08
(c)  0.02                             
(d) 2.5                                                                                                                               
Ans.(a)
8. For which the reaction order, the half-life of the reactant is half of the full lifetime(time for 100% conversion) of the reactant
(a) Zero order                                                                
(b) half order
(c) First order                                                                   
(d) Second order                                             
Ans.(a)
9. Two different liquids are flowing through different pipes of the same diameter. In the first pipe, the flow is laminar with centerline velocity,Vmax.1,Whereas in the second pipe, the flow is turbulent. For turbulent flow, the average velocity is 0.82 times the centerline velocity,vmax.2 . For equal volumetric flow rates in both the pipes, the ratio Vmax.1/Vmax.2(up to two decimal place) is_____.
(a) 1.64                                     
(b)2.45
(c)0.25                                         
(d)1.44                                                                                                                        
Ans.(a)
10. A cylindrical packed bed of height 1m is filled with equal sized spherical particles. The particles are nonporous and have a density of 1500kg/m3.The void fraction of the bed is 0.45. The bed is fluidized using air (density 1kg/m3). If the acceleration due to gravity is 9.8m/s2, the pressure drop (in pa) across the bed at incipient fluidization(up to one decimal place) is ____.
(a) 4400                                                            
(b) 5054-5080
(c) 6407                                                          
(d) 8080-8100                                                             
Ans.(d)
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