91. If a paper moistened with lead acetate for five minutes when placed in manhole turns black. The sewer certainly contains__________________? September 7, 2025 by Admin A. Hydrogen sulphide B. Carbon dioxide C. Methane D. Oxygen ✅ The correct answer is option A.
92. Working principle of dead weight pressure gauge tester is based on __________________? September 7, 2025 by Admin A. Pascal’s law B. Dalton’s law of partial pressure C. Newton’s law of viscosity . D. Avogadro’s hypothesis ✅ The correct answer is option A.
93. Total pressure on a lmxlm gate immersed vertically at a depth of 2 m below the free water surface will be ___________________? September 7, 2025 by Admin A. 1000 kg B. 4000 kg C. 2000 kg D. 8000 kg ✅ The correct answer is option A.
94. The algae dies out in the zone of_____________________? September 7, 2025 by Admin A. Degradation B. Active decomposition C. Recovery D. Cleaner water ✅ The correct answer is option A.
95. Return on investment ratio is the ratio of the_____________? September 7, 2025 by Admin A. Net income to owner’s equity B. Market price per share to earnings per share C. Cost of goods sold to average cost of inventory at hand D. Net credit sales to average net receivable ✅ The correct answer is option A.
96. The vapour pressure over the concave surface is________________? September 7, 2025 by Admin A. less man the vapour pressure over the plane surface B. equal to the vapour pressure over the plane surface C. greater than the vapour pressure over the plane surface D. zero ✅ The correct answer is option A.
97. Boussinesq’s equation for ascertaining unit pressure at a depth on sewers due to traffic loads, is__________________? September 7, 2025 by Admin A. pt = 3H3p/2 Z5 B. pt = 2H3p/3 Z5 C. pt = 3H3p/2Z5 D. pt = 2 3p/3Z5 ✅ The correct answer is option A.
98. Newton’s law of viscosity is a relationship between________________? September 7, 2025 by Admin A. shear stress anctthejiate of angular distortion B. shear stress and viscosity C. shear stress, velocity and viscosity D. pressure, velocity and viscosity ✅ The correct answer is option A.
99. The units of kinematic viscosity are_______________? September 7, 2025 by Admin A. metres2 per sec B. kg sec/meter C. newton-sec per meter D. newton-sec per meter ✅ The correct answer is option A.
100. What is the simplest form of business organization ? September 7, 2025 by Admin A. Sole proprietorship B. Partnership C. Enterprise D. Corporation ✅ The correct answer is option A.