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Q-VALUE

1 Quantity of energy released in a given nuclear reaction. Normally expressed in MeV, but occasionally in atomic mass units. 2 Ratio of thermo

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QIANA

TN for a speciality nylon with silken properties when spun into fibre US.

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QPP AMPLIFIER

Abbrev for quiescent push-pull amplifier.

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QPSK

Abbrev for quaternary phase-shift keying.

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QUAD

Either four insulated conductors twisted together star-quad or two twisted pairs twin-quad. Nor

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QUADR-, QUADRI-

Prefixes from Lt quattuor, four,

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QUADRANT

1 Of a circle, a quarter of the circle. 2 Rectangular cartesian axes divide the plane into four quad

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QUADRANT DIVIDERS

A form of dividers in which one limb moves over an arc fixed rigidly to the second limb and may be secured to it by tightening a binding screw,

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QUADRANTAL DEVIATION

Those parts of the deviation which vary as sine and cosine of twice the compass course, thus changing their sign quadrantally with change in direction of the ship

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QUADRANTAL POINT

One of the four points of the compass which in moving from north correspond to the headings NE45 , SE135

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