ANS:C - has

No answer description is available. 

ANS:B - free(var-name);

No answer description is available. Let's discuss.

ANS:D - general layout of the chain lines.

Layout of chain lines mean arrangement or plan of lines. That's why it is not necessarily measuring distance should be accurate is taking importance. Length, Scale and Features are important.
General layout is because it doesn't matter how we deal with the plan or layout. Measured distance should be accurate.

ANS:B - False

It is 1.01859.

ANS:B - Oughtred

Slide rule is used primarily for multiplication and division, and also for functions such as exponents, roots, logarithms and trigonometry, but is not used for addition or subtraction.

ANS:A - increase.

For a hydraulically smooth pipe, the friction factor fff at a Reynolds number Re=2100\text{Re} = 2100Re=2100 is denoted as f1f_1f1​. This friction factor f1f_1f1​ corresponds to a certain level of surface roughness. When the pipe is further smoothened (i.e., the roughness is reduced):

• Friction Factor fff: The friction factor fff for flow in a pipe is influenced by the relative roughness ( ϵ/D\epsilon / Dϵ/D, where ϵ\epsilonϵ is the absolute roughness and DDD is the pipe diameter) and the Reynolds number Re\text{Re}Re.
• Impact of Smoothening:
  • If the pipe surface is made smoother (reducing ϵ\epsilonϵ), the relative roughness ϵ/D\epsilon / Dϵ/D decreases.
  • A decrease in relative roughness typically leads to a reduction in the friction factor fff for a given Reynolds number Re\text{Re}Re.
  • This reduction occurs because smoother surfaces induce less resistance to flow, resulting in lower frictional losses.

ANS:D - Uttarakhand

Uttarakhand Government appoints Prasoon Joshi as it's Brand Ambassador.

ANS:A - Goa

53rd International Film festival of India was held in Goa.

ANS:A - Gujarat

Gujarat became the first state in the country to get 5G service in all districts.

ANS:A - Bihar

Bihar Chief Minister Nitish Kumar inaugurated Ganga Jal Aapurti Yojna.