ANS:A - 34152

"You must do it today."

ANS:B - ptr is a pointer to an array of 10 integers

No answer description is available. Let's discuss.

ANS:E - All the above.

Marble is a stratified rock but it has irregular patches that's why it is consider as a unstratified rock. Marble is Un-Stratified Rock, it doesn't split easily.

ANS:B - I_A = 5 A, I_B = 10 A

Currents divide in inverse proportion of resistances. .

ANS:C - is characterised by the presence of foam throughout the space between trays.

Priming in a distillation column is characterized by the presence of foam throughout the space between trays. Priming occurs when liquid entrainment from one tray is carried upwards to higher trays in the column due to high vapor velocities or other factors. This liquid entrainment creates foam, which fills the space between trays and can interfere with the proper operation of the column. The other statements are not accurate:

• Priming typically results from very high gas velocity rather than very low gas velocity. When the gas velocity is too high, it can entrain liquid from the trays, leading to priming.
• Priming is generally undesirable from an efficiency standpoint, as it can cause maldistribution of liquid and vapor throughout the column, leading to reduced separation efficiency and poor column performance.
• Priming does not necessarily reduce the overall pressure drop. In fact, it can increase pressure drop by interfering with proper vapor and liquid flow distribution in the column, leading to inefficiencies and increased resistance to flow.

ANS:C - Mounting of two or more impellers in series on a single shaft.

The option that will facilitate the achievement of a very high head (such as 30 meters) in the case of a centrifugal pump is: Mounting of two or more impellers in series on a single shaft.

Explanation:

1. Increasing Impeller Speed and Volute Area:
   • Increasing the impeller speed can increase the kinetic energy imparted to the fluid, but it may not significantly increase the static pressure (head) that the pump can achieve.
   • Increasing the volute area can affect efficiency and flow distribution but does not directly increase the head.
2. Increasing Number of Vanes in the Impeller:
   • Increasing the number of vanes in the impeller can improve efficiency and potentially increase the pressure rise per stage (impeller). However, there are practical limits to how much head increase can be achieved solely by increasing the number of vanes.
3. Mounting Two or More Impellers in Series:
   • Mounting multiple impellers in series on a single shaft allows each impeller to contribute to increasing the pressure (head) sequentially.
   • Each impeller adds its pressure rise to the total head, resulting in a cumulative effect. This configuration is effective in achieving higher heads than what a single impeller can achieve alone.
4. Conclusion:
   • While increasing impeller speed and volute area, as well as increasing the number of vanes, can contribute to pump performance, mounting two or more impellers in series is specifically designed to achieve very high heads efficiently.
   • Therefore, the correct option that facilitates achieving a very high head in a centrifugal pump is (c) Mounting of two or more impellers in series on a single shaft.

ANS:B - Haryana

Haryana issued guidelines to prevent the dismissal of employees without enquiry.

ANS:D - January 6

January 6 is being celebrated as the World Day of War Orphans.

ANS:A - Andhra Pradesh

Andhra Pradesh has Jio's 5G service begun.

ANS:C - 65th

DRDO celebrated its 65th Foundation Day on 01 Jan 2023.