Mechanical Engineering

Question: A flow is called hyper-sonic, if the Mach number is [A]. less than unity [B]. unity [C]. between 1 and 6 [D]. none of these Answer: Option D Explanation: No answer description available for this question.

Question: A flow is called super-sonic if the [A]. velocity of flow is very high [B]. discharge is difficult to measure [C]. Mach number is between 1and 6 [D]. none of these Answer: Option C Explanation: No answer description available for this question.

Question: A flow is called sonic, if the Mach number is unity. [A]. Agree [B]. Disagree Answer: Option A Explanation: No answer description available for this question.

Question: A flow is called sub-sonic, if the Mach number is [A]. less than unity [B]. unity [C]. between 1 and 6 [D]. more than 6 Answer: Option A Explanation: No answer description available for this question.

Question: The celerity (velocity) of a pressure wave in a fluid is given by (where K = Bulk modulus, and ρ = Density of the fluid) [A]. K.ρ [B]. K/ρ [C]. ρ/K [D]. K.ρ Answer: Option B Explanation: No answer description available for this question.

Question: Bulk modulus of a fluid __________ as the pressure increases. [A]. remains same [B]. decreases [C]. increases Answer: Option C Explanation: No answer description available for this question.

Question: Bulk modulus of a fluid is the ratio of [A]. shear stress to shear strain [B]. increase in volume to the viscosity of fluid [C]. increase in pressure to the volumetric strain [D]. critical velocity to the viscosity of fluid Answer: Option C Explanation: No answer description available for this question.

Question: A closed tank is completely filled with an oil. If it is made to move with a horizontal acceleration, then the pressure at the back end will be more than that at the front end. [A]. Correct [B]. Incorrect Answer: Option A Explanation: No answer description available for this question.

Question: An open tank containing liquid is moving with an acceleration on an inclined plane. The inclination of the free surface of the liquid will be __________ to the acceleration of the tank. [A]. equal to [B]. directly proportional [C]. inversely proportional Answer: Option B Explanation: No answer description available for this question.

Question: An open tank containing liquid is made to move from rest with a uniform acceleration. The angle 0 which the free surface of liquid makes with the horizontal is such that (where a = Horizontal acceleration of the tank, and g = Acceleration due to gravity) [A]. tan θ = a/g [B]. tan θ…