Q. Let X1, X2 be two independent normal random variables with means µ1, µ2 and standard deviations s1, s2, respectively. Consider Y = X1 – X2; µ1 = µ2 =1, s1 = 1, s2 = 2. Then, A. Y is normally distributed with mean 0 and variance 1 B. Y is normally distributed with mean […]
Q. The height (in mm) for a 125 mm sine bar to measure a taper of 27 ̊ 32¢ on a flat work piece is ____________(correct to three decimal places). Ans: 57.000 – 58.000
Q. For a Pelton wheel with a given water jet velocity, the maximum output power from the Pelton wheel is obtained when the ratio of the bucket speed to the water jet speed is___________(correct to two decimal places). Ans: 0.48 – 0.52 Sol:
Q. A flat plate of width L = 1 m is pushed down with a velocity U = 0.01 m/s towards a wall resulting in the drainage of the fluid between the plate and the wall as shown in the figure. Assume two-dimensional incompressible flow and that the plate remains parallel to the wall. The
Q. If the wire diameter of a compressive helical spring is increased by 2%, the change in spring stiffness (in %) is (correct to two decimal places). Ans: 8.243 Sol: Stiffness of helical spring,
Q. A four bar mechanism is made up of links of length 100, 200, 300 and 350 mm. If the 350 mm link is fixed, the number of links that can rotate fully is . Ans: 1
Q. A steel column of rectangular section (15 mm × 10 mm) and length 1.5 m is simply supported at both ends. Assuming modulus of elasticity, E = 200 GPa for steel, the critical axial load (in kN) is (correct to two decimal places). Ans: 1.00 – 1.20
Q. A six-faced fair dice is rolled five times. The probability (in %) of obtaining “ONE” at least four times is (A) 33.3 (B) 3.33 (C) 0.33 (D) 0.0033 Ans: 0.33
Q. The number of atoms per unit cell and the number of slip systems, respectively, for a face- centered cubic (FCC) crystal are (A) 3, 3 (B) 3, 12 (C) 4, 12 (D) 4, 48 Ans: 4, 12
The number of atoms per unit cell and the number of slip systems Read More »
Q. The time series forecasting method that gives equal weightage to each of the m most recent observations is (A) Moving average method (B) Exponential smoothing with linear trend (C) Triple Exponential smoothing (D) Kalman Filter Ans: Moving average Method
