Muntaha Nasir ENGINEERING   -   Electrical Engineering

Which type of motor is known for its high starting torque and variable speed control?

DC motors provide high starting torque and are easily controlled for variable speed applications.
Muntaha Nasir ENGINEERING   -   Electrical Engineering

What is the primary function of a Zener diode in electronic circuits?

Zener diodes are used for voltage regulation, allowing current to flow in the reverse direction when a specific breakdown voltage is reached.
Muntaha Nasir ENGINEERING   -   Electrical Engineering

Which theorem states that any linear electrical network with multiple sources can be replaced by an equivalent single voltage source and a series resistor?

Thevenin's Theorem simplifies complex networks to a single voltage source and series resistance.
Muntaha Nasir ENGINEERING   -   Electrical Engineering

What is the main purpose of a transformer in electrical circuits?

Transformers are used to change the voltage levels in AC circuits, either stepping up or stepping down the voltage.
Tail Briz ENGINEERING   -   Chemical Engineering

According to the first law of thermodynamics, what is the mathematical expression for the change in internal energy of a system undergoing a process?

The first law of thermodynamics states that the change in internal energy (ΔU) of a system undergoing a process is equal to the heat transfer (Q) into the system plus the work done (W) on the system.
Tail Briz ENGINEERING   -   Chemical Engineering

Which type of control system utilizes feedback from the controlled variable to adjust the manipulated variable and maintain desired process conditions?

In a closed-loop control system, feedback from the controlled variable is continuously compared to the desired setpoint, and adjustments to the manipulated variable are made to maintain the desired process conditions.
Tail Briz ENGINEERING   -   Chemical Engineering

What is the driving force for mass transfer in a binary gas mixture undergoing diffusion?

In diffusion, the driving force for mass transfer is the concentration gradient of the species in the mixture, causing molecules to move from regions of high concentration to regions of low concentration.
Tail Briz ENGINEERING   -   Chemical Engineering

Which parameter is used to characterize the flow behaviour of a fluid in laminar and turbulent flow regimes?

The Reynolds number is a dimensionless parameter used to characterize the flow behavior of a fluid, distinguishing between laminar and turbulent flow regimes based on the fluid velocity, density, viscosity, and characteristic length.
Tail Briz ENGINEERING   -   Chemical Engineering

In a reversible exothermic reaction, what effect does increasing the temperature have on the equilibrium conversion?

According to Le Chatelier's principle, increasing the temperature of an exothermic reaction will shift the equilibrium towards the reactants, resulting in a decrease in the equilibrium conversion.
Tail Briz ENGINEERING   -   Mechanical Engineering

What is the main function of a Pelton wheel turbine in a hydropower plant?

A Pelton wheel turbine is designed to extract energy from high-pressure water jets and convert it into rotational mechanical energy, which is then used to drive an electrical generator in a hydropower plant.

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