A visbreaker is a processing unit in an oil refinery whose purpose is to reduce the quantity of residual oil produced in the distillation of crude oil and to increase the yield of more valuable middle distillates (heating oil and diesel) by the refinery.

The viscosity of a fluid is a measure of its resistance to deformation at a given rate.

Visual Inspection, used in maintenance of facilities, mean inspection of equipment and structures using either or all of raw human senses such as vision, hearing, touch and smell and/or any non-specialized inspection equipment.

The impairment of the ability to enjoy a pleasant view as in high concentrations of electricity power lines.

They are pumps directly related to and necessary for maintaining the operation of the propulsion machinery.

Vitrification is the transformation of a substance into a glass, an important application is the vitrification of radioactive waste to obtain a substance that is hopefully safer and more stable for disposal.

Delivered by Hyundai, the 314,00dwt vessels STENA VISION and STENA VICTORY have one parameter in common with traditional VLCCs and that is the length, 333m.

The void coefficient is a number that can be used to estimate how much the reactivity of a nuclear reactor changes as voids (typically steam bubbles) form in the reactor moderator or coolant.

An enclosed space in the cargo area external to a cargo tank, other than a hold space, ballast space, oil fuel tank, cargo pump-room, pump room, or any space in normal use by personnel, (IBC Code).

The Voith Cycloidal Rudder is based on the Voith-Schneider Propulsor. It has a rotor casing that can rotate about a vertical axis, with two axially parallel rudder blades or hydrofoils projecting from it.

The Voith Turbo Fin is a rotating cylinder at the end of the skeg. It ensures stable flow and increases lift by means of the larger angle of attack.

A tug driven by the Voith-Schneider propellers arranged in the forebody. Underneath the propellers there is a nozzle plate.

A type of the azimuthing propulsor which generates thrust by means of profiled blades that project from the bottom of the ship. The blades are mounted in a rotor casing that is flush with the bottom of the ship.

Vojens is known to be the solar city number one. The world largest solar heating plant (70,000 m2) and the world largest underground thermal storage pit (200,000 m3).

Volatility is measured by the day-to-day difference in the price of electricity.

Volatile organic compounds are organic chemicals that have a high vapour pressure at room temperature.

Volatile Organic Compounds (VOC) are light components of crude oil, which evaporate during loading operations or during the carriage of high-volatility crude oil cargoes.

Petroleum, having a flash point below 60°C as determined by the closed cup method of testing.

In chemistry, volatility is a material quality which describes how readily a substance vapourises.

Voltage is defined as the difference of electric potentials between points in an electric field.