ANS:C - Boutique

No answer description is available. 

ANS:A - A referenced has to be de-referenced to access a value.

No answer description is available. Let's discuss.

ANS:C - 20 (sec θ - 1)

It's called hypotenusal allowance. And option C is correct.

ANS:C - 1, 2, 3 and 4

No answer description is available.

ANS:C - Danckwerts

The surface renewal model of mass transfer was enunciated by Toor and Marchello. The surface renewal theory, proposed by Toor and Marchello in 1965, is a model used to describe mass transfer at fluid-solid interfaces. It extends the concepts of the film theory and takes into account the dynamic nature of the interface, where the solid surface is intermittently exposed to fresh fluid. According to the surface renewal theory, the mass transfer rate is influenced not only by the concentration gradient at the interface but also by the frequency and duration of the contact between the fresh fluid and the solid surface. This dynamic behavior of the interface results in periodic fluctuations in the concentration profile near the surface, leading to enhanced mass transfer rates compared to the steady-state film theory. The surface renewal theory has found applications in various fields, including chemical engineering, environmental engineering, and biotechnology, where accurate prediction of mass transfer rates at fluid-solid interfaces is essential for process design and optimization. Therefore, the correct answer is Toor and Marchello.

ANS:B - low barometric pressure

Cavitation in a centrifugal pump results from low discharge pressure. Here’s an explanation: Cavitation occurs when the pressure of the liquid drops below its vapor pressure, causing the formation of vapor bubbles within the pump. In the context of a centrifugal pump:

• High discharge pressure: High discharge pressure typically prevents cavitation because it keeps the pressure above the vapor pressure of the fluid, preventing the formation of vapor bubbles.
• Low barometric pressure: Barometric pressure, which is the atmospheric pressure, does not directly cause cavitation within the pump. Cavitation occurs within the pump itself due to local pressure drops.
• High discharge velocity: While high discharge velocity is a factor, cavitation is more directly related to pressure. High discharge velocity may contribute to localized pressure drops, but it's not the primary cause.
• High discharge rate: This also contributes to the conditions that can lead to cavitation, but it's not the direct cause. A high discharge rate may lead to lower pressures at the pump inlet or within the impeller, contributing to cavitation.

ANS:D - New Delhi

NCC (National Cadet Corps), and UNEP (United Nations Environment Programme) signed MoU in New Delhi to tackle the issue of plastic pollution.

ANS:C - Shri Amit Shah

Union home minister Amit Shah will attend the 18th formation day of the National Disaster Management Authority (NDMA).

ANS:C - Tirupati

Union Minister of State for Electronics and Information Technology Rajeev Chandrasekhar will launch the pre-production run of India's first Lithium cell manufacturing facility in Tirupati, Andhra Pradesh.

ANS:C - Lt. Governor Manoj Sinha

In the biggest development in Kashmir, Jammu and Kashmir Governor Manoj Sinha inaugurated Kashmir's first multiplex in Srinagar.