ANS:C - 2, 4, 5

No answer description is available. Let's discuss.

ANS:D - is less when the lift is moving downwards.

Acceleration is produced due to the net force.
So, when lift moving downward net force will be T-mg and it generates -ve acceleration that is downward direction.
T-mg =-ma.
T = mg-ma which is less. As upward tension in cable is= T+mg.
As downward tension in cable = T-mg.
So, it shows that the downward is being substracted so it is less.

ANS:B - 10 ohms

=> sqrt(5 * 20) = 10.

So answer = 10 ohms.

ANS:C - -600 volts

No answer description is available.

ANS:C - tube mill

Cement clinker is reduced to a fine size primarily by a ball mill.

Explanation:

• Ball Mill: A ball mill is widely used in the cement industry for grinding cement clinker into fine powders. It operates by rotating a cylinder with steel grinding balls, causing the balls to fall back into the cylinder and onto the material to be ground. The rotation of the cylinder and the grinding action of the balls crush and grind the clinker particles into a fine powder.
• Roll Crusher: Typically used for secondary or tertiary crushing of materials, including some applications in cement production, but not specifically for reducing clinker to fine size.
• Tube Mill: Used for grinding various materials, including cement clinker, where the grinding occurs inside a rotating tube with balls or rods.
• Hammer Mill: Generally used for coarse grinding of materials, such as grains or biomass, but not typically used for reducing cement clinker to fine size.

ANS:D - all 'a', 'b' & 'c'

The characteristic equation of a control system, which is given by 1+G(s)=01 + G(s) = 01+G(s)=0, where G(s)G(s)G(s) is the transfer function of the system, plays a critical role in determining the stability of the system. Here's how it relates to the options provided:

1. Depends only upon the open loop transfer function:
   • The characteristic equation is derived from the closed-loop transfer function G(s)1+G(s)\frac{G(s)}{1 + G(s)}1+G(s)G(s)​. However, the stability of the system is primarily influenced by the poles of the open-loop transfer function G(s)G(s)G(s). These poles dictate the behavior of the closed-loop system, including its stability.
2. Determines its stability:
   • The roots (or poles) of the characteristic equation 1+G(s)=01 + G(s) = 01+G(s)=0 directly determine whether the closed-loop system is stable, marginally stable, or unstable. Stable systems have all poles with negative real parts, while unstable systems have at least one pole with a positive real part.
3. Is the same for set point or load changes:
   • The characteristic equation remains unchanged regardless of whether there are changes in the set point or load conditions. It solely depends on the system's transfer function G(s)G(s)G(s).
4. Conclusion:
   • Therefore, the characteristic equation for a control system primarily determines its stability and depends on the open-loop transfer function G(s)G(s)G(s). It encapsulates critical information about the system's behavior and stability properties, making it essential for analysis and design considerations in control engineering.

ANS:A - India

Indian TV actor Dev Joshi in 'DearMoon CREW' for SpaceX Moon Trip.

ANS:B - UAE

External Affairs Minister S. Jaishankar will inaugurate the India Global Forum UAE 2022 in Dubai.

ANS:A - New Zealand

New Zealand passed into law a ban on the sale of tobacco products to anyone born on or after Jan. 1, 2009, furthering an ambitious plan to create a smoke-free nation that could pave the way for similar policies elsewhere in the world.

ANS:A - USA

Bank notes printed by the United States for the first time with two female signatures.