Drill bit used to locate the precise center of a hole to be drilled. The sharp, small point, which extends from the cutting end focuses the force of the drill and bores a small hole. Also called a brad point bit, it eliminates the need for a center punch by preventing the bit from drifting off center.
Short shank drill designed to drill a shallow, flared hole in the end of a piece of metal, which will be turned in a lathe. The lathe tailstock center fits in the center-drilled hole in the metal.
Also called a thread gauge, this template that has an internal V on one end and an External V on the other with two smaller V’s on the side with each of them being precision ground and lapped. This gauge is used for setting tool bits in the tool post of the lathe, for checking the included angles of machine centers and checking the shapes of threading tool bits.
V-shaped device, which is mounted on a ruler, very much the way a blade is on a combination square, and is placed against a circular object with the object is in the center of the V, which allows for measurement of the radius of the circular object.
Temperature scale that uses 100 division between the freezing point of water (0 degrees) and the boiling point of water (100 degrees). Centigrade temperatures are marked by the letter C, as in 40degrees C.
Writ issued by a superior court to a lower court requiring the latter to produce a record of the proceedings of a particular case for purposes of reviewing these proceedings to determine if there is a legal basis for an appeal hearing
Central Heating System
A heating system consisting of four different elements; heat producer, exchanger, distributor and controls. 1. The heat producer is usually a gas or oil burner with electric or coal heaters being infrequently used. 2. The exchanger is what the producer heats; a furnace if air is heated; a boiler if water or steam is heated. 3. The heat distributor distributes the heat. With a hot water system, the heated water is sent through the pipes by a circulator to converters or radiators that give off heat. Forced warm air system has air drawn into ducts by a large fan and forced out through warm air registers. With a steam heating systems, steam rises on its own to heat radiators, which then give off heat. 4. The control is normally a thermostat at one location but may also be several thermostats at various locations for zone control.
Compressor that uses centrifugal force to compress gas by feeling it into a wheel with radial vanes. The wheel is then seal inside of a cylinder and spun. When the wheel rotates, the gas is thrown away from the wheel center. The outward spinning motion compresses the gas.
Ceramic Color Glaze
Opaque glaze of silica or similar material, which is fused onto the masonry at temperatures above 1500 degrees F. Control of the quality is by ASTM Standard C126 that ensures that specified requirements have been met.
Kiln fired flat tile that is formed into shape from clay or other silicon materials such as sand or quartz. Available in a variety of shapes, sizes, colors and finishes they are used for countertops, floor and wall surfaces in kitchens, baths, etc. or in decorative places. Impervious to water, stain resistant and easy to clean they are useful in high traffic areas. Installed in evenly-spaced rows they are cemented to plywood and the joints are filled in with grout.
Certified Residential Specialist (CRS)
Certification granted by the Realtors National Marketing Institute upon successful completion of an education program and the required residential sales experience.
Comparison of the ignition quality of diesel fuel, Cetane and alpha -methyl-napthalene are both hydrocarbons but alpha-methyl-napthalene has very poor ignition quality while cetane has good ignition quality. After mixing them together, adjustment is made so that it has the same ignition quality as the diesel fuel being tested and the cetane number, given to the diesel fuel, is the percentage of cetane in the mixture.