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1)“Going by the _________ that many hands make light work, the school _______ involved all the students in the task.”
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2)“Her _______ should not be confused with miserliness; she is ever willing to assist those in need.”
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3)Seven machines take 7 minutes to make 7 identical toys. At the same rate, how many minutes would it take for 100 machines to make 100 toys?
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4)A rectangle becomes a square when its length and breadth are reduced by 10 m and 5 m, respectively. During this process, the rectangle loses 650 m2 of area. What is the area of the original rectangle in square meters?
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5)A number consists of two digits. The sum of the digits is 9. If 45 is subtracted from the number, its digits are interchanged. What is the number?
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6)For integers 𝑎, 𝑏 and 𝑐, what would be the minimum and maximum values respectively of 𝑎+𝑏+𝑐 if log |𝑎|+log |𝑏|+log |𝑐|=0?
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7)Given that 𝑎 and 𝑏 are integers and 𝑎+𝑎2 𝑏3 is odd, which one of the following statements is correct?
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8)From the time the front of a train enters a platform, it takes 25 seconds for the back of the train to leave the platform, while travelling at a constant speed of 54 km/h. At the same speed, it takes 14 seconds to pass a man running at 9 km/h in the same direction as the train. What is the length of the train and that of the platform in meters, respectively?
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9)Consider the following three statements: (i) Some roses are red. (ii) All red flowers fade quickly. (iii) Some roses fade quickly. Which of the following statements can be logically inferred from the above statements?
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10)The value of the expression (Gate 2018 general aptitude)
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11)If pqr ≠ 0 and p −x = 1 q , q −y = 1 r , r −z = 1 p , what is the value of the product xyz? Gate-2018-General-Aptitude
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12)The RL of the initial station is 200 m. If BS 1.54m and FS 0.45m , then the RL of the last station in m is ________________. Gate-2018-General-Aptitud
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13)A system of two identical components connected in series has reliability of 0.25. The reliability of each component is _______________. Gate-2018-General-Aptitude
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14)In a direct rope haulage operating along a 1500 m long incline, 180 tonne of coal is hauled in 7 hours. The average rope speed is 7.5 km/h. The set changing time for the tubs is 2 minutes each at the top and bottom of the incline. If the tub capacity is 1.0 tonne, the number of tubs in the set is Gate-2018-General-Aptitude
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15)In a level terrain, a vertical orebody of 20 m uniform width is worked by surface mining method. The density of the ore is 2.5 tonne/m3 . The ultimate pit has a depth of 60 m, width of 20 m at pit bottom, and a pit slope of 45o . The overall stripping ratio for this condition in m3 /tonne is Gate-2018-General-Aptitude
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16)A 20 m long steel tape used for survey is found to be short by 10 cm. If the area measured with the steel tape is 5000 m2 , the actual area in m2 is ____. Gate-2018-General-Aptitude
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17)Two points on the equator have longitudes 55oE and 25oW. Considering radius of earth as 6400 km, the distance between the two points in km is ____ . Gate-2018-General-Aptitude
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18)Sum of the series 5, 10, 15, ..........., 500 is __________________. Gate-2018-General-Aptitude
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19)What is the most-abundant anion in a 2CaO.SiO2 melt? (A) (SiO4) 4 (B) (Si2O7) 6 (C) (Si3O10) 8 (D) (Si4O14) 10 . Gate-2018-General-Aptitude
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20)For a single phase system with K components, the exact differential of Gibbs free energy is given as : dG = −SdT + VdP +∑μidni K i=1 Which one of the following can be derived from the above expression as a Maxwell’s relation? (A) ∂S ∂P| T,ni = − ∂V ∂T| P,ni (B) ∂S ∂V| T,ni = ∂V ∂T | P,ni (C) ∂S ∂T| T,ni = − ∂V ∂P| T,ni (D) ∂S ∂P| T,ni = ∂V ∂P| T,ni Gate-2018-General-Aptitude
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21)A continuous and aligned carbon-fiber composite consists of 25 vol. % of fibers in an epoxy matrix. The Young’s modulus of fiber and matrix, respectively are Ef = 250 GPa and Em = 2.5 GPa. If the composite is subjected to longitudinal loading (iso-strain condition and assuming elastic response), the fraction of load borne by the reinforcement is ________ (to two decimal places) . Gate-2018-General-Aptitude
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22)At a temperature of 710 K, the vapour pressure of pure liquid Zn is given by: pZn(Xzn = 1.0) = 3.6 × 10−4 atm. The Raoultian activity coefficient (γZn) of Zn in Zn-Cd alloy liquid at 710 K is approximated by: ln(γZn) = 0.875(1 − XZn) 2 The ratio [ pZn(Xzn=0.7) pZn(Xzn=1.0) ] for a liquid alloy with Xzn = 0.7 is __________ (to two decimal places). Gate-2018-General-Aptitude
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23) Using the trapezoidal rule with two equal intervals (n = 2, Δx = 1), the definite integral ∫ 1 ln(x) 4 2 dx =______________ (to two decimal places). Gate-2018-General-Aptitude
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24)CO2 foams are used for enhanced oil recovery due to which of the following reasons? (I) It can be used for CO2 sequestration (II) CO2 can exist in the form of a dense fluid at reservoir conditions (III) CO2 can convert to hydrocarbon at the reservoir temperature and pressure (IV) Solubility of CO2 in oil is higher compared to gases like N2 (A) Only I, II, and III (B) Only I, II, and IV (C) Only II, III, and IV (D) Only I, III, and IV . Gate-2018-General-Aptitude
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25)Which one of the following is FALSE about a typical offshore deepwater oil spill? (A) Using boom boats to prevent spilled oil from spreading (B) Allowing the spill to reach the shore before clearing (C) Burning of spilled oil (D) Using a skimmer to collect the oil Gate-2018-General-Aptitude
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26)Which one of these methods is NOT commonly used to deal with the problem of soil contamination by oil spillage? (A) Biodegradation (B) Leaching out the oil (C) Soil recycling (D) Using rain water to wash the contaminants . Gate-2018-General-Aptitude
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27)The factor on which the selection of an offshore platform for the reservoir does NOT depend: (A) Water depth (B) Reservoir fluid properties (C) Sea bed conditions (D) Best case weather forecast .Gate-2018-General-Aptitude
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28)“The driver applied the _______ as soon as she approached the hotel where she wanted to take a ________.” General aptitude GATE 2018
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29)“It is no surprise that every society has had codes of behaviour; however, the nature of these codes is often _________.” General aptitude GATE 2018
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30)Hema’s age is 5 years more than twice Hari’s age. Suresh’s age is 13 years less than 10 times Hari’s age. If Suresh is 3 times as old as Hema, how old is Hema? General aptitude GATE 2018
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31)General aptitude 2018
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32)Let X be a random variable following the binomial distribution. If E(X) = 2 and Var(X) = 1.2 , then P(X = 2) , accurate to three decimal places, is equal to ________. GATE-2018-General-Aptitude
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33)A sliver of 4.2 kilotex is fed in a rotor spinning machine with opening zone draft of 1400. The draft in the transport duct is 5 and the sliding draft on the rotor wall till the rotor groove is 2. If the total back doubling within the rotor is 120, then the linear density (in tex) of the output yarn is ___________ . Gate-2018-General-Aptitude
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34)The temperature T in a room varies as a function of the outside temperature T0 and the number of persons in the room p, according to the relation T = Κ (Θp + T0 ), General aptitude GATE 2018
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35)A fruit seller sold a basket of fruits at 12.5% loss. Had he sold it for Rs. 108 more, he would have made a 10% gain. What is the loss in Rupees incurred by the fruit seller? General aptitude GATE 2018
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36)The price of a wire made of a superalloy material is proportional to the square of its length. The price of 10 m length of the wire is Rs. 1600. What would be the total price (in Rs.) of two wires of lengths 4 m and 6m?(General aptitude GATE 2018)
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37)Which of the following function(s) is an accurate description of the graph for the range(s) indicated? (General aptitude GATE 2018)
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38)Consider a sequence of numbers a1, a2, a3, ⋯ , an where an = 1 n − 1 n+2 , for each integer n > 0. What is the sum of the first 50 terms? General aptitude GATE 2018
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39)Each of the letters arranged as below represents a unique integer from 1 to 9. The letters are positioned in the figure such that (A × B × C), (B × G × E) and (D × E × F) are equal. (Gate 2018 General aptitude)
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40)If x 2 + x − 1 = 0 what is the value of x 4 + 1 x 4 ? (General aptitude )
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41)Which one of the following options is correct about the effects of steam stimulation in increasing the oil production rate? (I) Reduces the oil viscosity (II) Increases the formation damage (III) Reduces the interfacial tension (IV) Increases the oil viscosity (A) Only I and II (B) Only II and III (C) Only III and IV (D) Only I and III Gate-2018-General-Aptitude
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42)Which one of the following is INCORRECT about oil based drilling muds? (A) Good rheological properties at higher temperatures (as high as 250 oC) (B) Effective against corrosion (C) Detection of gas kick is difficult (D) Less inhibitive than water based muds Gate-2018-General-Aptitude
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43)Assume that viscous, gravity, and capillary are the only dominant forces for fluid flow in a given reservoir, a cone formed around the perforation zone will break into the well, when : Gate-2018-General-Aptitude
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44)A cylindrical sandstone core, 7.5 cm long and 3.5 cm diameter has grain density of 3 g/cm3 . If the mass of the dry core is 200 g, the porosity of the core is __________%. (rounded-off to two decimal places) Gate-2018-General-Aptitude
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45)Exponential decline curve is to be used to estimate the oil reserves of a well. The current oil production rate is 1000 m3 per day and yearly decline rate is 6% per year. If the minimum oil flow rate economically sustainable for the well is 1 m3 per day, the reserves (economically producible) associated with the well are _____ × 106 m3 . (rounded-off to two decimal places. Use 1 year = 365 days) Gate-2018-General-Aptitude
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46)Which of the following statements are true about Natural Gas Hydrates? Natural gas hydrates: (I) are formed under low temperature and high pressure. (II) can store approximately 160 m3 of gas per m3 of hydrate at 25 oC and 1 atm. (III) formation is an endothermic process. (IV) are potential sources of methane. Gate-2018-General-Aptitude
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47)A dilute mixture of coal and sand particles, both of diameter 100 μm and densities 1800 kg/m3 and 2600 kg/m3 , respectively, is to be classified by elutriation technique using water (density 1000 kg/m3 , viscosity 10-3 Pa.s). Assuming Stokes law is applicable, the minimum settling velocity of the particles in the mixture is (g = 9.81 m/s2 ): Gate-2018-General-Aptitude
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48)Which one of the following options presents the correct combination? Gate-2018-General-Aptitude
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49)Primary and secondary indicators of kick in a well where the indicators are: Gate-2018-General-Aptitude
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50)Which one of the following options presents correct combinations of exploration methods with their respective frequency of operation? Gate-2018-General-Aptitude
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51)Which one of the following options presents the correct combinations? (P) Borisov’s (I) Critical rate correlation in vertical wells with coning (Q) Schols’ (II) Horizontal well performance relation (R) Efros’ (III) Vertical well performance relation (S) Wiggins’ (IV) Critical rate correlation in horizontal wells with coning.Gate-2018-General-Aptitude
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52)Which one of the following options represents the typical sequence of applying cut-offs for pay zone identification in a conventional reservoir? Gate-2018-General-Aptitude
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53)Which one of the following options represents the correct sequence of arrival of acoustic wave energy recorded in a sonic log? Gate-2018-General-Aptitude
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54)The variation of the amount of salt in a tank with time is given by, dx dt + 0.025x = 20 , Gate-2018-General-Aptitude
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55)A box contains 100 balls of same size, of which, 25 are black and 75 are white. Out of 25 black balls, 5 have a red dot. A trial consists of randomly picking a ball and putting it back in the same box, i.e., sampling is done with replacement. Two such trials are done. The conditional probability that no black ball with a red dot is picked given that at least one black ball is picked, is __________. Gate-2018-General-Aptitude
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56)A cylindrical pipeline of length 30 km is transporting naphtha. Pressure sensors are attached along pipe length to detect leaks. Gate-2018-General-Aptitude
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57)A dry core was subjected to the mercury injection test in the laboratory. Following are the related details: Average formation porosity = 0.2 Formation volume factor, BO = 1.2 reservoir-bbl/STB Oil APIo = 32, Gate-2018-General-Aptitude
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58)A well is drilled with water based mud. The water saturation in the completely flushed zone (no formation fluid residual) is given by, Gate-2018-General-Aptitude
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59) An oil well is tested at a flow rate (Q) of 50 BOPD. The bottom hole flowing pressure (Pwf) is 500 psia.The Vogel’s correlation is: Gate-2018-General-Aptitude
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60)Using Miller, Dyes and Hutchinson (MDH) method, the skin factor of an oil well is found to be s = – 3.5. Gate-2018-General-Aptitude
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61)An oil well (producing under expansion drive only) in a reservoir is subjected to two pressure build-up tests. Gate-2018-General-Aptitude
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62)A well in a very large reservoir has a wellbore radius of 10 cm. The sandstone, with a porosity of 0.25 and 12% (by grain volume) calcite (CaCO3), is to be acidized with a preflush (HCl solution) so as to dissolve all the calcite upto a distance of 1 m from the wellbore. Gate-2018-General-Aptitude
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63)At a particular temperature, the vapour pressure of benzene and toluene are 4 atm and 1.2 atm, respectively. Gate-2018-General-Aptitude
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64)Saturated steam at 0.7 atm and 90°C condenses on a vertical pipe of 2 cm outside diameter and 40 cm length. The average condensation heat transfer coefficient on the tube is 12000 W/m2K. Gate-2018-General-Aptitude
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65)Oil is being transported between two reservoirs with the help of three parallel pipes at steady state. Gate-2018-General-Aptitude
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66)A driller finds an oil reservoir with a gas cap starting at a depth of 1000 m from the surface. Gate-2018-General-Aptitude
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67)The viscosity, μ (in Pa.s) of a power law fluid as a function of shear rate, γ̇ (in s-1 ) is given by the following relation: Gate-2018-General-Aptitude
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68)A heterogeneous rectangular rock of cross-sectional area 1 m2 perpendicular to the flow is being flooded by water to measure the effective permeability from cross-section AA’ to cross-section CC’. Gate-2018-General-Aptitude
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69)How to practice aptitude questions?
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