Civil Engineering Multiple Choice Questions
Civil Engineering Multiple Choice Questions 1) Mach number is defined as The ratio of a mass number to weight The ratio of characteristic velocity to velocity of sound The ratio of force to velocity The ratio of friction to acceleration Answer: b Explanation: Mach number refers to a non-dimensional number in fluid mechanics which defines the velocity of the fluid with respect to the velocity of sound in air or any fluidic medium through which the body travels. In other words, we can say that it is the ratio of the velocity of the object to the speed of sound in air or vacuum. Consider an example to understand this concept, suppose an airplane travels at a speed of 420 m/s has a Mach number of 4, find the velocity of sound in air? Where, M = Mach number C = speed of an object a = Velocity of the sound in air or any fluidic medium therefore, 2) If gram crop has a kor period of 24 days and kor depth of 16 cm, find the duty of the gram 1866 ha/cumec 2036 ha/cumec 1296 ha/c...