The area of a square is 𝑑. What is the area of the circle which has the diagonal of the square as its diameter?
Q. The area of a square is 𝑑. What is the area of the circle which has the diagonal of the square as its diameter? Ans: Option D
GATE
“A___________investigation can sometimes yield new facts, but typically organized ones are more successful
Q. “A___________investigation can sometimes yield new facts, but typically organized ones are more successful.” The word that best fills the blank in the above sentence is (A) meandering (B) timely (C) consistent (D) systematic Ans: Meandering
“From where are they bringing their books?__bringing_________books from
Q. “From where are they bringing their books?_______bringing_________books from_____.” The words that best fill the blanks in the above sentence are (A) Their, they’re, there (B) They’re, their, there (C) There, their, they’re (D) They’re, there, there Ans: They’re, their, there
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A hot liquid is to be cooled in a 1-1 shell and tube heat exchanger from 80 oC to 50 oC
Q. A hot liquid is to be cooled in a 1-1 shell and tube heat exchanger from 80 oC to 50 oC. Cooling water enters the tube side at 30 oC, and exits at 45 oC. The properties of the liquids are constant. Also, the overall heat transfer coefficient is same for counter-current and co-
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In a roll crusher rolls of diameter 1 m each are set in such a manner that minimum clearance between the crushing surfaces
Q. In a roll crusher, rolls of diameter 1 m each are set in such a manner that minimum clearance between the crushing surfaces is 15 mm. If the angle of nip is 31o, the maximum diameter of the particle (in mm) which can be crushed is Ans: 52 to 54
The humidity of air at a dry-bulb temperature of 65 oC is 0.025 kg water/kg dry air
Q. The humidity of air at a dry-bulb temperature of 65 oC is 0.025 kg water/kg dry air. The latent heat of vaporization of water at 0 oC is 2500 kJ/kg. The psychrometric ratio of air is 0.95 kJ (kg dry air)-1 K-1. Considering 0 oC as reference temperature, the enthalpy of air (in kJ/kg)
The humidity of air at a dry-bulb temperature of 65 oC is 0.025 kg water/kg dry air Read More »
Hydrogenation of benzene is to be carried out using Ni (density = 8910 kg/m3) as catalyst, cast in the form of non-porous hollow cylinders
Q. Hydrogenation of benzene is to be carried out using Ni (density = 8910 kg/m3) as catalyst, cast in the form of non-porous hollow cylinders, as shown below. The reaction occurs on all the surfaces of the hollow cylinder. During an experiment, one such cylinder is suspended in the reactant stream. If the observed rate
A set of standard stainless steel pipes, each of internal diameter 26.65 mm and 6000 mm length, is used to make a plug flow
Q. A set of standard stainless steel pipes, each of internal diameter 26.65 mm and 6000 mm length, is used to make a plug flow reactor by joining them in series to carry out degradation of polyethylene. Seven such pipes are required to obtain a conversion of 66% at 450 K. The minimum number of
In a closed piston-cylinder system, methane was observed to obey the following equation of state
Q. In a closed piston-cylinder system, methane was observed to obey the following equation of state P(V– nb) = nRT where b = 0.029 m3/mol. The temperature and volume are 500 ºC and 5 m3 respectively for 100 moles of methane. At this state of the system, the isobaric rate of change of temperature with
The volume of liquid filled in a spherical storage tank of radius R is computed from height of liquid
Q. The volume of liquid filled in a spherical storage tank of radius R is computed from height of liquid, h, in the outside tube (neglecting the volume of liquid in the outside tube) as Ans: 1.80 to 2.00