Question 61. In abrasive jet machining, as the distance between the nozzle tip and the work surface increases, the
material removal rate

Question 62. Consider the differential equation x2 d2y/dx2 + x dy/dx - 4y = 0 with the boundary conditions of
y(0) = 0 and y(1) = 1. The complete solution of the differential equation is

Question 63. The inverse Laplace transform of the function F(s) = 1/s(s + 1) is given by

Question 64. A box contains 4 red balls and 6 black balls. Three balls are selected randomly from the box one
after another, without replacement. The probability that the selected set contains one red ball and
two black balls is

Question 65. The state of stress at a point under plane stress condition is Ïƒxx = 40 MPa, σyy = 100 MPa and txy = 40 MPa The radius of the Mohr's circle representing the given state of stress in MPa is

Question 66. In a DC arc welding operation, the voltage-arc length characteristic was obtained as
Varc = 20+5l where the arc length l was varied between 5 mm and 7 mm. Here Varc denotes the
arc voltage in Volts. The arc current was varied from 400 A to 500 A. Assuming linear power
source characteristic, the open circuit voltage and the short circuit current for the welding
operation are

Question 67. Water (Cp = 4.18 kJ/kg.K) at 80°C enters a counterflow heat exchanger with a mass flow rate of 0.5 kg/s. Air (Cp = 1 kJ/kg.K) enters at 30°C with a mass flow rate of 2.09 kg/s. If the effectiveness of the heat exchanger is 0.8, the LMTD (in °C) is

Question 68. Choose the grammatically INCORRECT sentence:

Question 69. Complete the sentence: Universalism is to particularism as diffuseness is to _______________.

Question 70. Which one of the following options is the closest in meaning to the word given below? Nadir