AND-OR CIRCUIT

Gating circuit that produces a prescribed output condition when several possible combined input signals are applied; exhibits the characteristics of the AND gate and the OR gate.

and-or_circuit input output condition circuit gate

Related Terms

PLENUM CHAMBER

An enclosed space in which a plenum condition exists; air is forced into it for slow distribution through ducts.

plenum_chamber plenum condition space air enclosed enclosed_space

OVERCURING

A condition resulting from vulcanizing longer than necessary to achieve full development of physical strength; causes softness or brittleness and impaired ageresisting quality of the material.

overcuring development condition brittleness quality

1. A condition existing when the drive rod of the drill swivel head is not centered and parallel with the borehole being drilled. 2. A borehole that has deviated from its intended course. 3. A condition existing wherein any linear excavation (shaft, drift, borehole) deviates from a previously determined or intended survey line or course. 4. State in which an equipment or subsystem is in standby, maintenance, or mode of operation other than online.

off-line operation survey equipment parallel rod condition head line drill mode drive_rod drive linear excavation state

MONITOR

1. An instrument used to measure continuously or at intervals a condition that must be kept within prescribed limits, such as radioactivity at some point in a nuclear reactor, a variable quantity in an automatic process control system, the transmissions in a communication channel or bank, or the position of an aircraft in flight. 2. To use meters or special techniques to measure such a condition. 3. A person who watches a monitor.

monitor variable process point condition channel communication radioactivity automatic instrument control measure aircraft

LIMIT STATE

The condition beyond which a structure or a structural member is deemed unsafe due to one or more loads or load effects.

limit_state condition load member beyond structure

ISOTHERMAL EQUILIBRIUM

The condition in which two or more systems are at the same temperature, so that no heat flows between them.

isothermal_equilibrium condition heat two

IRREVERSIBLE ENERGY LOSS

Energy transformation process in which the resultant condition lacks the driving potential needed to reverse the process; the measure of this loss is expressed by the entropy increase of the system.

irreversible_energy_loss process entropy condition potential resultant loss measure energy

INTERMITTENT OPERATION

Condition in which a device operates normally for a time, then becomes defective for a time.

intermittent_operation condition device

HYDROSTATIC STRESS

The condition in which there are equal compressive stresses or equal tensile stresses in all directions, and no shearstressesonanyplane.

hydrostatic_stress condition

ANAEROBIC

A condition in which 'free' or dissolved oxygen is not present in the water.

anaerobic dissolved_oxygen oxygen condition