“Going by the _________ that many hands make light work, the school _______ involved all the students in the task.”
The words that best fill the blanks in the above sentence are
“Her _______ should not be confused with miserliness; she is ever willing to assist those in need.”
The word that best fills the blank in the above sentence is
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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?
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?
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?
For integers a,b and c, what would be the minimum and maximum values respectively of
Given that a and b are integers and a + a2 b3 is odd, which one of the following statements is correct?
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?
Which of the following functions describe the graph shown in the below figure?
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?
The Taylor series expansion of the function,
around x = 0 (up to 4th order term) is:
The inverse of the matrix is
Naphthenic acid is a/an __________ compound.
Which one of the following is the integrating factor (IF) for the differential equation,
A phase diagram of a black oil is shown in the figure (Y is the critical point).
Match the following chemicals to their respective oilfield applications:
The CH4-hydrate equilibrium curve (dashed) and CO2-hydrate equilibrium curve (solid) on a pressure-temperature plane above 0°C are shown in the figure. The two curves divide the plane in four non-overlapping regions. In which region are CO2-hydrates stable and CH4-hydrates unstable?
Plot of ratio of pressure to gas compressibility factor (P/Z) vs. cumulative gas production (Gp) for a gas reservoir (represented by solid curve in the figure) was shown to a reservoir engineering student.
The student made the following statements:
(I) A water aquifer is attached to this gas reservoir.
(II) P/Z vs. Gp curve must always be a straight line for water encroachment in a gas reservoir.
(III) The ultimate gas recovery is diminished due to water encroachment.
Which of the above statements are TRUE?
Waste water from oil industry consists of oil in free and emulsified forms. The oil in the free form can be recovered by:
A reservoir model consisting of two porous matrices M and N, separated by a fracture, is shown in the figure. The matrices are strongly water-wet and are saturated with oil of specific gravity 0.8. Water is injected only in the fracture at injection well A. If the Reynolds number for the flow in the fracture conduit is assumed to be less than unity, which one of the following force will dominate oil recovery from the porous matrix M during the water-flood operation?
A fractional flow curve is given for a core for which the irreducible water saturation is 0.2 and the residual oil saturation is 0.3. The initial water saturation in the core is 0.3. If Welge’s method is applied to find the breakthrough saturation and fraction flow of water at breakthrough, which point should be used in the figure to draw a tangent line to the fractional flow curve.
Which one of the following curves represents behavior of oil phase viscosity as a function of pressure in the reservoir (where, Pb is the bubble point pressure of oil)?
Pick out the INCORRECT statement.
Which one of the following phenomena encountered during flooding is desirable for increasing oil recovery from a reservoir?
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
Which one of the following is FALSE about a typical offshore deepwater oil spill?
Which one of these methods is NOT commonly used to deal with the problem of soil contamination by oil spillage?
The factor on which the selection of an offshore platform for the reservoir does NOT depend:
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
Which one of the following is INCORRECT about oil based drilling muds?