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GATE Engineering Sciences Online Mock Test

GATE Engineering Sciences (XE) 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 Engineering Sciences test question details at the end of the quiz.

GATE 2019 : Engineering Sciences questions answers are applicable for any kind of XE Entrance preparation or PSU Competitive Exam in India. You can practice as much as you can to gather knowledge of how to answers GATE Engineering Sciences Exam 2019  critical type papers in short time and this can be a big factor for cracking all India engineering entrance level exam.

GATE Engineering Sciences Online Mock Test

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Question 1
As temperature increases, diffusivity of an atom in a solid material, 
A
increases
B
decreases
C
remains constant
D
depends on the specific material
Question 2
Which of the following is NOT correct? 
A
Dislocations are thermodynamically unstable defects.
B
Dislocations can move inside a crystal under the action of an applied stress.
C
Screw dislocations can change the slip plane without climb
D
Burger’s vector of an edge dislocation is parallel to the dislocation line.
Question 3
At a constant atmospheric pressure, the number of phases, P which coexist in a chosen system at equilibrium, is related to the number of components, C in the system and the degree of freedom, F by 
A
P+F=C-2
B
P+F=C+2
C
P+F=C+1
D
P+F=C-1
Question 4
Which one of the following metals is commonly alloyed with iron to improve its corrosion resistance? 
A
Co
B
Cr
C
Ti
D
Nb
Question 5
The number of slip systems in a metal with FCC crystal structureis 
A
4
B
6
C
8
D
12
Question 6
Upon recrystallization of a cold worked metal, 
A
strength increases and ductility decreases
B
strength decreases but ductility increases
C
both strength and ductility increase
D
both strength and ductility decrease
Question 7
In carbon fiber reinforced resin composites, for a given fiber volume content, Young’s modulus depends on the orientation of the fiber with respect to the applied load. Which orientation of the fibers will give the maximum value of Young’s modulus? 
A
transverse
B
longitudinal
C
random
D
both transverse and longitudinal
Question 8
Vulcanization is related to 
A
strengthening of rubber
B
extrusion
C
injection moulding
D
addition polymerization
Question 9
Match the conventional ceramic materials listed in Column I with their respective common applications in Column IIColumn IP. Lead Zirconate Titanate (PZT)Q. Zinc Oxide (ZnO)R. Silicon Carbide (SiC)S. Zirconia (ZrO2)Column II1. cutting tool2. thermal barrier coating3. actuator4. varistor5. super conductor 
A
P-1, Q-2, R-3, S-5
B
P-3, Q-2, R-1, S-5
C
P-2, Q-1, R-5, S-3
D
P-3, Q-4, R-1, S-2
Question 10
Match the terminologies given in Column Iwith theirrelations listed in Column IIColumn IP. domain wallQ. Fick’s lawR. Matthiessen’s ruleS. Hall-Petch relationT. Meissner effectColumn II1. superconductors2. mechanical properties3. ferromagnetic materials4. resistivity of impure metals5. diffusion 
A
P-1, Q-3, R-5, S-2, T-4
B
P-3, Q-5, R-2, S-4, T-1
C
P-3, Q- 5, R-4, S-2, T-1
D
P-3, Q-4, R-3, S-2, T-4
Question 11
The measured temperature of a system is 30oC.Its exact absolute temperature in K is 
A
303.00
B
303.10
C
303.15
D
303.16
Question 12
The fuel air mixture in a pertrol engine is ignited with a spark plug at the end of compressionstroke. This process 
A
increases the entropy of the fuel air mixture but decreases the entropy of the spark plug
B
decreases the entropy of the fuel air mixture but increases the entropy of the spark plug
C
decreases the entropy of the fuel air mixture and of the spark plug
D
increases the entropy of the fuel air mixture and of the spark plug
Question 13
For a pure substance the critical isotherm on the p-v plane exhibits 
A
a maximum
B
a minimum
C
a point of inflection
D
a discontinuity
Question 14
For an ideal gas as a working fluid for a given heat input Q, the process that gives the maximum work among the following four processes is 
A
isothermal
B
constant volume
C
constant pressure
D
isentropic
Question 15
On a ln pvsh coordinate system, where ln p is the y-coordinate and h is the x coordinate, the slope of a constant entropy line is 
A
1/v
B
v
C
p/v
D
1/(pv)
Question 16
In free radical polymerization, one of the following techniques permits simultaneous increase in rate of polymerization and polymer molecular weight. 
A
Solution polymerization.
B
Suspension polymerization.
C
Bulk polymerization.
D
Emulsion polymerization.
Question 17
LLDPE is obtained by 
A
Ziegler-Natta polymerization of ethylene.
B
free-Radical polymerization of ethylene.
C
free-Radical polymerization of ethylene and alpha-olefins.
D
Ziegler-Natta copolymerization of ethylene and alpha-olefins.
Question 18
A hindered phenol is added to a polyolefin 
A
to increase ozone resistance
B
to increase foamability
C
to increase oxidation resistance
D
to increase crosslinkability
Question 19
Stretching of rubber leads to 
A
decrease in alignment of polymer chains
B
increase in alignment of polymer chains
C
no change in alignment of polymer chains
D
decrease in strength of rubber
Question 20
The tensile breaking strength of polycarbonate (I), low density polyethylene (II), polystyrene (III) and polypropylene (IV) can be arranged as 
A
IV > II > I > III
B
I > II > IV > III
C
I > III > IV > II
D
III > I > II > IV
Question 21
High molecular weight polymers could be obtained even at low monomer conversion in case of 
A
Step growth polymerization
B
Living polymerization
C
Chain growth polymerization
D
Solid state polymerization
Question 22
A reinforced polymer composite is made by the incorporation of 
A
elastomers into the polymer.
B
fibers into the polymer.
C
plasticizers into the polymer.
D
gaseous additives into the polymer.
Question 23
A 40mm x 40mm square polymer composite sample with 5mm thickness (heat transfer distance) exhibited a heat flow rate of 60W, when the temperatures of the warm and cold surfaces were 90oC and 25oC respectively. The thermal conductivity of the sample in W.m--1K-1is 
A
5.67
B
15.3
C
2.88
D
0.667
Question 24
An extruder is supplied with 40 kW of power. The mass flow rate of a polymer through the extruder is 240 kg h-1 and the specific heat capacity of the polymer is 4 kJ kg-1 K-1. The maximum possible temperature rise in the polymer is 
A
150 K
B
100 K
C
600 K
D
Zero
Question 25
Kawashiorkor disease is caused due to the deficiency of 
A
lysine
B
unsaturated fatty acids
C
vitamin K
D
protein
Question 26
Which of the following statements is TRUE in case of oxidative rancidity of vegetable oils and fats? 
A
It is caused by the reaction of saturated fatty acids and oxygen
B
It involves polymerization of fatty acids
C
It is caused by the reaction of unsaturated fatty acids with oxygen
D
All of These.
Question 27
The food borne disease, Q fever is caused by the organism, 
A
Clostridium perfringens
B
Coxiella burnetti
C
Bacillus cereus
D
Staphylococcus aureus
Question 28
The primary bacterial spoilage of poultry meat at low temperature, with characteristic sliminess at outer surface, is caused by 
A
Pseudomonas spp.
B
Aspergillus spp.
C
Bacillus spp.
D
Candida spp.
Question 29
The weight gain (in gram) per gram protein consumed is called 
A
Net Protein Ratio (NPR
B
Biological Value (BV)
C
Protein Efficiency Ratio (PER)
D
Chemical Score (CS)
Question 30
Which of the following carbohydrates is NOT classified as dietary fibre? 
A
Agar
B
Pectin
C
Sodium alginate
D
Tapioca starch
Question 31
In the extruder barrel, the compression is achieved by back pressure created by the die and by 
A
increasing pitch and decreasing diameter of the screw
B
using the tapered barrel with constant pitch
C
increase in the clearance between barrel surface and screw
D
opening of the die
Question 32
The brown colour of bread crust during baking is due to Maillard reaction between 
A
aldehyde groups of sugars and amino groups of proteins
B
aldehyde groups of sugars and vitamins
C
aldehyde groups of sugars and salt
D
starch and yeast
Question 33
Blanching influences vegetable tissues in terms of 
A
enzymes production
B
alteration of cytoplasmic membrane
C
stabilization of cytoplasmic proteins
D
stabilization of nuclear proteins
Question 34
How much skim milk (in kg) containing 0.1% fat should be added to 500 kg of cream containing 50% fat to produce standardized cream containing 36% fat? 
A
140
B
165
C
195
D
210
Question 35
Which of the following statements is NOT CORRECT in relation to muscle proteins ? 
A
Actin and myosin interact to form actomyosin which is responsible for muscle contraction
B
Collagen contributes to the toughness of muscles due to its abundant presence
C
Elastin, a constituent of ligaments, is tougher than collagen
D
Actomyosin is not the main state of actin and myosin in post-mortem muscles
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GATE XE Online Mock Test = 2

GATE Engineering Sciences Question Answers

Congratulations - you have completed GATE Engineering Sciences Question Answers.You scored %%SCORE%% out of %%TOTAL%%.Your performance has been rated as %%RATING%%
Your answers are highlighted below.
Question 1
One of the parts (A, B, C, D) in the sentence given below contains an ERROR. Which one of the following is INCORRECT? I requested that he should be given the driving test today instead of tomorrow.    
A
requested that
B
should be given
C
the drivin2 test
D
instead of tomorrow
Question 2
Which one of the following options is the closest in meaning to the word given below? Latitude     
A
Eligibility
B
Freedom
C
Coercion
D
Meticulousness
Question 3
Choose the most appropriate word from the options given below to complete the following sentence: Given the seriousness of the situation that he had to face, his was impressive.     
A
beggary
B
nomenclature
C
jealousy
D
nonchalance
Question 4
Choose the most appropriate alternative from the options given below to complete the following sentence: If the tired soldier wanted to lie (town, he the mattress out on the balcony.   
A
should take
B
shall take
C
should have taken
D
will have taken
Question 5
A and B are friends. They decide to meet between 1 PM and 2 PM on a given day. There is a condition that whoever arrives first will not wait for the other for more than 15 minutes. The probability that they will meet on that clay is     
A
1/4
B
1/16
C
7/16
D
9/16
Question 6
There are eight bags of rice looking alike, seven of which have equal weight and one is slightly heavier. The weighing balance is of unlinuted capacity. Using this balance, tile minimum number of weighings required to identify the heavier bag is     
A
2
B
3
C
4
D
8
Question 7
Raju has 14 currency notes in his pocket consisting of only Rs. 20 notes and Rs. 10 notes. The total money value of the notes is Rs. 230. The number of Rs. 10 notes that Raju has is     
A
8
B
6
C
9
D
10
Question 8
One of the legacies of tile Roman legions was discipline. In the legions, military law prevailed and discipline was brutal. Discipline on the battlefield kept units obedient, intact and fighting, even when the odds and conditions were against them. Which one of the following statements best sunis up the meaning of the above passage?   
A
Thorough regimentation was the main reason for the efficiency of the Roman legions even in adverse circmnstances.
B
The le2ions were treated inhumanly as if the men were animals.
C
Discipline was the armies’ inheritance from their seniors.
D
The harsh discipline to which the legions were subjected to led to the odds and conditions being against theni.
Question 9
Suppose 50% of the population of a village like oranges. 70% of the population like apples. and 40% like both. If a person is picked at random who likes at least one of these fruits, what is the probability that the person likes oranges?     
A
1/8
B
5112
C
1/2
D
5/8
Question 10
In a potential flow. the superposition of the stream functions of a uniform flow and a line source gives rise to a dividing streamline representing     
A
Rankin’s half-body
B
infinite circular cylinder
C
infinite rotating circular cylinder
D
infinite elliptical cylinder
Question 11
Identify the visualization method that shows a PATI-IIJNE iii an unsteady flow. assuming that the camera covers the required field of view.    
A
A dye is continuously injected and a snap shot is taken
B
A dye is continuously injected and a long-exposure picture is taken
C
A blob (or drop) of dye is injected and a snap shot is taken
D
A blob (or drop) of dye is inj cc ted and a long-exposure picture is taken
Question 12
In the case of a filly developed flow through a pipe, the shear stress at the centerline is     
A
a function of the axial distance
B
a function of the centerline velocity
C
zero
D
infinite
Question 13
A fully developed laminar flow is taking place through a pipe. If the flow velocity is doubled maintainn2 the flow laminar, the pressure loss would be     
A
halved
B
unaltered
C
doubled
D
trebled
Question 14
Air flows over a spherical storage vessel of diameter 4 m at a speed of 1 rn/s. To frnd the drag force on the vessel, a test run is to be carried out in water using a sphere of diameter 100 mm. The density and dynamic viscosity of air are 1.2 kg/m3 and 1.8 ×10-5 Pa.s, respectively. The density and dynamic viscosity of water are 1000 kg/m3 and 10-3 Pa.s, respectively. The drag force on the model is 4 N under dynamically similar conditions. The drag force (in N) on the prototype is approximately    
A
0.25
B
0.93
C
1.08
D
4
Question 15
The pressure (in bar) exerted on the bottom wall inside the vessel is approximately      
A
0.238
B
2.38
C
23.8
D
238
Question 16
The power (in kW) required to propel the boat is     
A
10
B
20
C
50
D
90
Question 17
The total kinetic energy imparted to the water per second (in kW) by the pump is      
A
10
B
25
C
28
D
81
Question 18
The displacement thickness (in mm) when S = 6 mm, is     
A
2.25
B
2
C
—2
D
—2.25
Question 19
Which of the following is NOT a Bravais lattice?    
A
Simple tetragonal
B
Body centred tetragonal
C
Base centred orthorhombic
D
Face centred tetragonal
Question 20
A Schottky defect in an ionic crystal is a stochiometric defect of    
A
Cation vacancy
B
Anion vacancy
C
Cation and anion vacancy
D
Cation and anion interstitial
Question 21
Which of the following techniques is NOT used to grow single crystals of semiconductors?      
A
Calendering
B
Czochralski
C
Float zone
D
Bridgman
Question 22
Which of the following sia1s is produced due to the elastic scattering of electrons by a material?    
A
Secondary electron
B
Backscattered electron
C
Auger electron
D
Photoelectron
Question 23
Of the following materials, which is the most suitable for an LED emitting at around 380 nm?    
A
Direct bandgap material with a small bandgap
B
Indirect bandgap material with a large bandgap
C
Direct bandgap material with a large bandgap
D
Indirect bandgap material with a small bandgap
Question 24
Which material has the lowest specific heat capacity at room temperature?        
A
Water
B
Mercury
C
Copper
D
Silver
Question 25
Microstrain can be measured by X-ray diffraction using peak    
A
Area and intensity
B
Position and area
C
Broadening and intensity
D
Position and broadening
Question 26
The Pi11in-Bedworth ratio is defined as the ratio of    
A
Volume of oxide to volume of metal
B
Weight of oxide to weight of metal
C
Density of oxide to density of metal
D
Surface area of oxide to surface area of metal
Question 27
Determine the mole fraction of vinyl chloride in a copolymer of vinyl chloride (CH2CHC1) and vinyl acetate (CH2-CH-OCOCH3) having molecular weight of 10520 g/mol and degree of polymerization of 160.     
A
0.14
B
0.30
C
0.70
D
0.86
Question 28
During cooling from 900CC to 723°C, the proeutectoid a forms from y. Find the volume % of proeutectoid a just below 723°C for the steel.      
A
44.9%
B
66.1%
C
55.1%
D
34.9%
Question 29
A disk of mass in = 0.25 g and radius r = 10 mm is at rest relative to a mass-less horizontal turntable spinning about a vertical axis at an angular speed of o = 2 rad/s. The turntable is assumed to be mounted on frictionless bearings. Another identical, initially non-rotating disk is dropped onto the spinning disk. Friction causes both disks (and the turntable) to eventually rotate at the same angular speed. The eventual angular speed of the disks is          
A
0.15 rad/s
B
1 rad/s
C
2 rad/s
D
4 rad/s
Question 30
A hollow shaft and a solid shaft constructed of the same material have the same length and the same outer radius R. The inner radius of the hollow shaft is 0.6 R. Assuming that both shafts are subjected to the same torque, the ratio of the maximum shear stress in the hollow shaft to that in the solid shaft is     
A
1.1
B
1.2
C
1.15
D
0.95
Question 31
Consider a simply supported beam loaded either by a uniformly distributed transverse load or by a concentrated transverse load applied at the center such that the maximum bending stress in both cases is the same. The ratio of the strain energy for the two cases is     
A
4/5
B
518
C
815
D
1
Question 32
At which of the following internal pressures will the cylindrical vessel yield as per the Tresca criterion if the yield strength of the material in tension is 320 MPa      
A
3.55 MPa
B
7.1 MPa
C
1.775 MPa
D
4.0 MPa
Question 33
The value of the additional end moment M (in N.m) required to obtain an upward deflection of 1 mm at the free end, is (moment is positive in counterclockwise direction)     
A
—533.33
B
533.33
C
—528
D
528
Question 34
For a pnre substance, at the triple point     
A
only solid and liquid phases co-exist in equi1ibiiiuii
B
only liquid and vapour phases co—exist in equilibrium
C
only solid and vapour phases co-exist in equilibrium
D
solid, liquid and vapour phases co-exist in equilibriuni
Question 35
The slope of a Mollier diagram at constant pressure indicates     
A
enthalpy
B
entropy
C
internal energy
D
temperature
Question 36
In a Diesel cycle. the ratio of cylinder volumes after and before combustion process is called      
A
cut-off ratio
B
back work ratio
C
pressure ratio
D
compression ratio
Question 37
The exergy (or availability) of a system at a specified state    
A
depends on the conditions of the system alone
B
depends on the conditions of the environment alone
C
depends on the conditions of both the system and environment
D
depends neither on the conditions of the system nor the environment
Question 38
Consider two Caniot heat engines A and B operating in series. Engine A receives heat from a reservoir at 1750 K and rejects heat to another reservoir at temperature I Engine B receives an amount of energy same as that rejected by Engine A from the reservoir at temperature T. Engine B then rejects heat to another reservoir at 320 K. In both cases, the engines produce some amount of work. If the thermal efficiencies of both the engines are the same, then the temperature T is approximatel     
A
848K
B
748K
C
648K
D
548K
Question 39
The ternperarnre and pressure at the triple point are     
A
295.2 K,O.69atm
B
295.2K,O.59atm
C
195.2 K, 0.69 atm
D
195.2K, 0.59 atm
Question 40
The heat transfer in (lie boiler is approximately     
A
4411 kJ/kg
B
3412 kJ/kg
C
323OkJ&g
D
2892 kJ/kg
Question 41
The net workdone in the cycle is approximately     
A
1004 kJ/kg
B
1104 kJ/kg
C
1204 kJ/kg
D
2004 kJ/kg
Question 42
The final pressure in the cylinder is    
A
130.7 kPa
B
lSOkPa
C
200.7 kPa
D
230.7 kPa
Question 43
The diamme used for the synthesis of nylon 6,4 is     
A
tetramethylene diamine
B
hexamethylene diamine
C
phenylene diamine
D
cyclohexane- 1 A-diamine
Question 44
A small amount of hydroquinone is added to methyl methacrylate monomer in order to    
A
improve its thermal stability
B
improve its hydrolytic stability
C
inhibit polymerization
D
regulate molecular weight
Question 45
Heat dissipation is most inefficient in     
A
Emulsion polymerization
B
Solution polymerization
C
Bulk polymerization
D
Suspension polymerization
Question 46
‘Which of the following polymers is sensitive to moisture absorption?      
A
Polyethylene
B
Polystyrene
C
Polyamide 6
D
Polybutadiene
Question 47
How many stereo isomers are possible in total on polymerization of butadiene?      
A
2
B
3
C
4
D
5
Question 48
If a solid elastomer ball of weight 100 g is allowed to free fall from a height of 10 m and it rebounds back to a height of 8 in. the hysteresis loss is     
A
19.60 J
B
9.80 3
C
1.96 J
D
0.98 3
Question 49
If the above sample is stressed to 2 MPa initially, then the time required to relax the stress to 1 MPa will be    
A
31.6 days
B
41.6 days
C
51.6 days
D
61.6 days
Question 50
If the activation energy for relaxation is 30 KJ/mol, the relaxation time at 35°C will be     
A
30.5 days
B
35.5 days
C
40.5 days
D
45.5 days
Question 51
Among the following fatty acids, which group is known as essential fatty acids?    
A
9,11 -Octadecadienoic and 9,11,1 3-Octadecatrienoic
B
9.1 2-Octadecadienoic and 9,12,1 5-Octadecatrienoic
C
9-Octadecenoic and 9,11 -Octadecadienoic
D
9,11 -Octadecadienoic and 9-Eicosenoic
Question 52
The important role of carotenoids in the human diet is their ability to serve as precursors of     
A
Vitamin C
B
Vitamin D
C
Vitamin A
D
Vitamin K
Question 53
‘Which one of the following microorganisms is used in the preparation of bread?     
A
C’andida ittilis
B
Saccharomvce.s cerevisiae
C
Saccharomices cei’aruin
D
Aspergilus niger
Question 54
Which one of the microorganisms given below is NOT RESPONSIBLE for ropy or stringy fennentation of milk?    
A
Alcaligenes viscolacris
B
Enterobacter aerogenes
C
Streptococcus cremoris
D
Streptococcus lacris
Question 55
A mild heat treatment of foods that destroys pathogens and extends its shelf life is called     
A
Baking
B
Blanching
C
Sterilization
D
Pasteurization
Question 56
The most common and least expensive plastic film used for packaging of solid food materials is     
A
Polyethylene
B
Polystyrene
C
Polypropylene
D
Polyvinylchloride
Question 57
Reassociation of amylose and formation of crystalline structure upon cooling of cooked starch solution is termed as     
A
Synersis
B
Gelatinization
C
Retrogradation
D
Denaturation
Question 58
Thermal destruction of microorganisms follows a kinetics of    
A
Zero order
B
First order
C
Second order
D
Fractional order
Question 59
Which one of the following is NOT A CORRECT statement?    
A
Meatiness is tile taste produced by compounds such as glutamate in products like cheese, soy sauce.
B
Astringency is a dry mouth feel in the oral cavity that is most associated with phenolic compounds.
C
Saltiness is a taste that is mainly produced by chloride ions.
D
Sourness is related to acidity and is sensed by hydrogen ion channels in the human tongue.
Question 60
Thermal death tune (TDT) of Clostridium botulinum at 121 °C is 2.78 min with a z-value of 10 °C. The TDT of the microorganism at 116 °C (in min) is     
A
5.270
B
8.791
C
1.390
D
0.712
Question 61
Initial moisture content (in percentage) of the food on wet basis is     
A
62.31
B
70.45
C
162.31
D
165.31
Question 62
The rate of drying (in kg/h) is     
A
128.79
B
126.35
C
77.81
D
0.0485
Question 63
The relative humidity of air (in percentage) is     
A
62.82
B
68.22
C
86.62
D
81.80
Question 64
The enthalpy (in kJ/kg) of moist air is      
A
85.93
B
54.55
C
31.38
D
99.38
Question 65
What is the ‘Sugar Ratio’ (in percentage) in the SCM in terms of sugar and water content in the final product?      
A
48.19
B
61.54
C
54.16
D
56.14
Question 66
If the ‘Concentration De-ee’ is 2.5, the amount of sugar added in kg in the milk sample is      
A
246.16
B
216.64
C
192.76
D
224.56
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