ANS:C - preceding

No answer description is available. 

ANS:B - False

False, A macro just replaces each occurrence with the code assigned to it. e.g. SQUARE(3) with ((3)*(3)) in the program. A function is compiled once and can be called from anywhere that has visibility to the funciton.

ANS:C - 12% moisture content

8% to 12%.

ANS:D - 2 f times/sec

Sampling frequency must be twice the input frequency.

ANS:A - Fine solids can not be leached in a Pachuka tank.

The statement "Fine solids can not be leached in a Pachuka tank" is incorrect. In fact, Pachuca tanks are commonly used in the mining industry for leaching processes, including the leaching of fine solids such as ores. Pachuca tanks, also known as air agitation tanks, are vertical cylindrical tanks equipped with a central draft tube and spargers (pipes or diffusers) for introducing air or other gases into the slurry. The introduction of air promotes agitation and mixing of the solid-liquid slurry, enhancing the leaching process. In the case of fine solids, such as finely ground ores, Pachuca tanks are particularly effective because the agitation provided by the air helps to suspend the fine particles evenly throughout the liquid phase. This ensures intimate contact between the solid particles and the leaching solution, facilitating efficient mass transfer and extraction of valuable metals or minerals from the ore. Therefore, Pachuca tanks are suitable for leaching both coarse and fine solids, making the statement "Fine solids can not be leached in a Pachuka tank" incorrect.

ANS:A - logarithmic

For turbulent flow in a smooth circular pipe, the velocity distribution profile across the pipe diameter is typically characterized by a logarithmic relationship.

Explanation:

1. Turbulent Flow in Pipes:
   • In turbulent flow within a smooth circular pipe, the velocity profile across the pipe diameter is not perfectly uniform but varies from zero at the pipe wall to a maximum at the centerline.
2. Logarithmic Velocity Profile:
   • The velocity distribution in turbulent flow is often described by the logarithmic law (also known as the logarithmic velocity profile). This law states that the velocity uuu at a distance yyy from the wall of the pipe can be expressed as: u(y)=vκln⁡(yy0)u(y) = \frac{v}{\kappa} \ln \left( \frac{y}{y_0} \right)u(y)=κv​ln(y0​y​) where:
     • vvv is the friction velocity,
     • κ\kappaκ is the von Kármán constant (approximately 0.41),
     • yyy is the distance from the wall,
     • y0y_0y0​ is the roughness height (usually very small for smooth pipes).
3. Characteristics:
   • The logarithmic velocity profile indicates that the velocity increases logarithmically as you move away from the wall towards the center of the pipe.
   • This profile is valid across the entire cross-section of the pipe under fully developed turbulent flow conditions.

Conclusion:

ANS:D - Odisha

The Odisha cabinet approved the inclusion of 22 castes in the state's list of SEBC.

ANS:C - Himachal Pradesh

Himachal Pradesh observes Statehood Day on January

ANS:C - Gujarat

The inaugural meeting of Business 20 was held in Gujarat.

ANS:B - Jammu & Kashmir

The J&K government is set to host its maiden SARAS Fair 2023 from February 4 to 14.