ANS:D - praised

No answer description is available. 

ANS:B - False

False, The scope of macros is globals and functions. Also the scope of macros is only from the point of definition to the end of the file.

ANS:A - petroleum

The most commonly used solvent in oil paints is.

Linseed oil is a common solvent used in oil paints. It is derived from flax seeds and is known for its slow drying time, which can be beneficial for artists who want to have more time to work with their paint. Other solvents that are commonly used in oil paints include turpentine, mineral spirits, and white spirit. The choice of solvent can depend on the desired drying time, the type of paint being used, and the preferences of the artist. Oil paint is a type of slow-drying paint that consists of particles of pigment suspended in a drying oil, commonly linseed oil. The viscosity of the paint may be modified by the addition of a solvent such as turpentine or white spirit, and varnish may be added to increase the glossiness of the dried oil paint film. Turpentine is the traditional solvent used in oil painting. It's based on tree resin and has a fast evaporation rate. Accordingly, it is Turpentine commonly used. But in some cases, it is where the dry condition is not satisfactory then we used Petrol.

ANS:D - 1 and 3

The change in resistance is due to change in length and area of cross-section.

ANS:B - Lewis number

The Lewis number (Le) is a dimensionless parameter used in fluid mechanics and heat transfer to characterize the relative importance of molecular diffusion to heat conduction in a fluid flow. It is defined as the ratio of the thermal diffusivity to the mass diffusivity of a fluid. Mathematically, the Lewis number (Le) is given by: 𝐿𝑒=𝛼𝐷Le=Dα​ Where:

• 𝛼α is the thermal diffusivity of the fluid.
• 𝐷D is the mass diffusivity of the fluid.

• When Le > 1: Heat transfer is dominant compared to mass transfer. This implies that thermal effects are more significant than mass diffusion effects.
• When Le < 1: Mass transfer is dominant compared to heat transfer. This implies that mass diffusion effects are more significant than thermal effects.
• When Le = 1: Heat transfer and mass transfer are equally important. This indicates that both thermal and mass diffusion effects have similar magnitudes.

ANS:A - specified mass flow rate can not be achieved.

Choking in the context of pipe flow refers to a restriction in the flow cross-sectional area, which limits the maximum mass flow rate that can pass through the pipe.

Explanation:

1. Choking Phenomenon:
   • Choking occurs when the flow velocity reaches the speed of sound (ccc) within the fluid. At this point, further reductions in pressure do not result in an increase in flow rate because the flow is already moving at the maximum speed possible for the prevailing conditions.
   • This condition is associated with a critical flow regime, particularly in compressible fluid dynamics, where changes in pressure no longer significantly influence the flow rate.
2. Characteristics:
   • Flow Limitation: Choking restricts the maximum mass flow rate that can pass through a given cross-sectional area of the pipe.
   • Pressure Drop: Increasing the pressure drop across the choked section of the pipe does not result in an increase in mass flow rate beyond a certain point.
   • Flow Velocity: Flow velocity at the choke point can approach the speed of sound, depending on the properties of the fluid and the conditions in the pipe.
3. Causes:
   • Choking can occur due to geometric constraints (e.g., sudden narrowing of the pipe), fluid properties (e.g., compressibility effects in gases), or operational conditions (e.g., high velocities).

Conclusion:

ANS:C - Chhattisgarh

The rare orange bat is found in Chhattisgarh's Kanger Valley National Park.

ANS:D - Rajasthan

The inaugural edition of the Indo-Egypt Joint Training Exercise Cyclone - I was held in Rajasthan.

ANS:C - Karnataka

The Karnataka state cabinet decided to allow the regularization of unauthorized quarrying.

ANS:D - Karnataka

India's first 3x platform wind turbine generators (WTG) have been installed in the state of Karnataka.