Mechanical Definitions |
Heavy-duty car : It is a railway motorcar which can weigh
more than 1400 pounds driven by an engine of 12-30 horsepower.
It is designed to haul heavy equipment and for hump-yard service.
|
Heavy Section Car : It is a railway motorcar which can
weigh 1200-1400 pounds and driven by an 8-12 horsepower engine.
|
Heel Block : It is a block or plate which is usually
fixed on the die shoe. It minimizes deflection of a punch or
cam. |
Heeling Adjuster : It is a dip needle having sliding
weight which can be moved along one of its arms to balance the
magnetic force. It is used to determine the correct position
of a heeling magnet. |
Heeling Magnet : It is used to correct the heeling error
a permanent magnet is placed vertically in a tube under the
center of a marine magnetic compass. |
Heel of a shot : In terms of blasting, the front or face
of a shot is farthest from the charge. The distance between
the mouth of a drill hole and the corner of the nearest free
face. It is a portion of a drill hole which is filled with the
tamping. |
Horsepower : It is a non-metric unit for measurement
of mechanical power. 1 horsepower is equal to 745.699872 watts.
|
Hydraulic Jump : It takes place when a rapidly flowing
liquid streams in an open channel suddenly changes to a slowly
flowing stream with a larger cross-sectional area and a sudden
rise in elevation of liquid surface occurs. It is a phenomenon
in the science of hydraulics which is frequently observed in
open channel flow such as rivers and spillways. |
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