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Re: DRDO Exam Papers For Mechanical Diploma
The syllabus for Mechanical SET (Scientist Entry Test) conducted by DRDO (Defence Research and Development Organization) is as follows: The decrease in the Helmholtz Free Energy for system in a given process for which initial and final temperatures are equal to the surrounding temperature indicates. (A) Maximum work obtained from the system (B) Minimum work obtained from the system (C) Minimum work which can be done on the system (D) Both (A) and (C) The vapor pressures of benzene and toluene at 70 C are 4 and 6 atm, respectively. A liquid feed of 0.6 moles of toluene at the same temperature is vaporized. Assuming Raoult’s law, the vapor phase mole fraction of benzene at equilibrium is approximately. (A) 0.30 (B) 0.40 (C) 0.50 (D) 0.60 An oil film of viscosity u and thickness h is sheared between a solid stationary wall and a circular disc of radius R, where h < <> The circular disc is rotating with angular speed w. For the same thickness of the film, if the radius of the disc is doubled, the angular speed remaining the same, by what factor the torque on the disc increases? (A) 2 (B) 4 (C) 8 (D) 16 A circular fire hose of inner cross-sectional area 100 cm2 is connected to a nozzle whose exit cross-sectional area is 4 cm2. The horizontal nozzle is discharging water at 0.6 m3/minute to the atmosphere. If a pressure gauge is connected to the hose side just before the nozzle, what would be the reading of the pressure gauge?(Density of water = 1000 kg/m3) (A) 312 kPa (B) 624 kPa (C) 89 kPa (D) 178 kPa A reciprocating pump has a piston of cross-sectional area A and is connected to a crank of radius r which is rotating with angular velocity ω. The pump is connected to the suction and the delivery pipes whose internal cross-sectional area is A1. The maximum velocity of the fluid element in the suction or delivery pipe is (A) (B) (C) ωr (D) Syllabus Mechanical SET (Scientist Entry Test) DRDO |
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