Q. The binary phase diagram of metals P and Q is shown in the figure. An alloy X containing 60% P and 40% Q (by weight) is cooled from liquid to solid state. The fractions of solid and liquid (in weight percent) at 1250 Β°C, respectively, will be Ans: 22.2% and 77.8% Sol:
Q. The figure shows a heat engine (HE) working between two reservoirs. The amount of heat (Q2) rejected by the heat engine is drawn by a heat pump (HP). The heat pump receives the entire work output (W) of the heat engine. If temperatures, T1 >T3 >T2 , then the relation between the efficiency (h
Q. A slender uniform rigid bar of mass π is hinged at O and supported by two springs, with stiffnesses 3π and π, and a damper with damping coefficient π, as shown in the figure. For the system to be critically damped, the ratio π/βππ should be Ans: 4β7 Sol:
Q. A prismatic, straight, elastic, cantilever beam is subjected to a linearly distributed transverse load as shown below. If the beam length is L, Youngβs modulus E, and area moment of inertia I, the magnitude of the maximum deflection is Ans: Sol: By using moment area IInd theorem
Q. A ball of mass 3 kg moving with a velocity of 4 m/s undergoes a perfectly-elastic direct-central impact with a stationary ball of mass m. After the impact is over, the kinetic energy of the 3 kg ball is 6 J. The possible value(s) of m is/are (A) 1 kg only (B) 6
Q. The derivative of f(x) = cos(x) can be estimated using the approximation (A) < 0.1 % (B) > 0.1 % and < 1 % (C) > 1 % and < 5 % (D) > 5 % Ans: > 0.1 % and < 1 % Sol:
The derivative of f(x) = cos(x) can be estimated using the approximation Read More Β»
Q. In an electrical discharge machining process, the breakdown voltage across inter electrode gap (IEG) is 200 V and the capacitance of the RC circuit is 50 Β΅F. The energy (in J) released per spark across the IEG is Ans: 1 Sol:
Q. A thin vertical flat plate of height L, and infinite width perpendicular to the plane of the figure, is losing heat to the surroundings by natural convection. The temperatures of the plate and the surroundings, and the properties of the surrounding fluid, are constant. The relationship between the average Nusselt and Rayleigh numbers is
Current Affairs is the most important area in all competitive exams. But the difficulty level is very high. Thatβs why; many aspirants get confused, how to select Current Affairs for Preparation of Competitive Examination? In this Post, Daily Current Affairs 2 September 2023, we have tried to cover each and every point and also included all important facts from
2 September 2023 Current Affairs β The Dayβs Top News | GKSERIES Read More Β»
Q. Water enters a circular pipe of length L = 5.0 m and diameter D = 0.20 m with Reynolds number ReD = 500. The velocity profile at the inlet of the pipe is uniform while it is parabolic at the exit. The Reynolds number at the exit of the pipe isΒ Β Β Β . Ans: 500
