A component of a hydropower plant; a pipe that delivers water to the turbine.

A charge, based on a fixed daily rate.

The gravity flow of water within soil.

Is obtained when the gas is cooled to first stage inlet temperature following each stage of compression.

An air infiltration measurement technique developed by the Brookhaven National Laboratory to measure changes over time (one week to five months) when determining a building's air infiltration rate. This test cannot locate exact points of infiltration, but ...

A guarantee issued by a bank, on behalf of a seller to a buyer, to support the sellers ability to perform under the contract. If the seller fails to perform in accordance with the contract the buyer can claim compensation under the guarantee.

A plot of expected operating characteristics (e.g.., discharge pressure versus inlet capacity, shaft horsepower versus inlet capacity).

Solar collector thermal performance ratings based on collector efficiencies, usually expressed in Btu per hour for solar collectors under standard test or operating conditions for solar radiation intensity, inlet working fluid temperatures, and ambient te ...

The risk that the buyer or seller will not complete the contract in accordance with their contractual obligations.

Those causes of loss for which the carrier is not legally liable. The elemental risks of ocean transport.

A term applied to warm-air heating systems that deliver heated air to rooms by means of registers or baseboards located along exterior walls.

The number of days from the shipment date that the seller is allowed to present documents to the advising or issuing bank under a Letter of Credit. It is normally 21 days, although it can be shorter.

Capacity of a soil or other surface to be penetrated by water sinking into the ground under the force of gravity. It thus expresses the rate of percolation.

The relationship of flow per unit area to differential pressure across a filter medium.

A unit of measurement for the ability of a material to retard the diffusion of water vapor at 73.4 F (23 C). A perm, short for permeance, is the number of grains of water vapor that pass through a square foot of material per hour at a differential vapor p ...

A Sunshine recorder of the type in which the time scale is supplied by the motion of the sun. The instrument, which is pointed at the celestial pole, consists of a hemispherical mirror mounted externally on the optical axis of a camera. The lens of the ca ...

A systematic observational error due to the characteristics of the observer. The uncertainty in a reading made by an observer may be acertained by a statistical analysis of his or her readings.

Official terminology for life jacket. When properly used a PFD will support a person in the water. Also called a life jacket, life preserver or life vest.

Small boat similar to and including jetskis

Portable Electronic Thermometer