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True/False
Both sensible heat and latent heat transfers can be read with a thermometer |
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| The smallest particle which retains the properties of a substance is |
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| The unit used to measure electrical power is |
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| ANSI is the abbreviation for |
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| American national standards institute |
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| Which lens shade can be used for number of welding or cutting operations |
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| Boyels law basically states taht of a confined gas the |
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Definition
| Volume of the gas decreases as the pressure exerted on it increases |
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| Seamless refers to pipe that |
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Definition
| is manufactured in endless lengths |
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| the maximum safe working pressure for acetylene is |
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Definition
| an equal pressure is exertered in all directions by an enclosed fluid |
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| the main purpose of a GFCI is to |
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| prevent shock to the user |
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| a cut made too slowly can be identified by |
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| oxygen connections all have what kind of threads |
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| a sanitary fitting that changes the direction of a drain 45degree is referred to as a |
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| in a venturi, containing a steady flowing fluid |
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Definition
| the velocity of the fluid increases as its pressure decreases |
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| the volume of gas varies inversely with the absolute pressure provided the temperature remains constant this is called |
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| Formula for solving a square Area |
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| formula for the circumfrence of a circle |
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| what is the formula for solving the Volume of a cylinder |
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| formula for solving imperial gallons in a cylinder |
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| formula for solving us gallons in a cylinder |
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| 1 cubic foot of water weighs |
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| 1 imperial cubic foot of water weighs |
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| 1 u.s. cubic foot of water weighs |
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| formula for converting Celcius to fahrenheit |
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| formula for converting fahrenheit to celcius |
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| standard atmostpheric pressure is |
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| Flammable/combustable materials are considered to be what class of fire |
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| if the temperature remains constant and the volume that a gas occupies increases the pressure will |
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Definition
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| air is the standard for measuring |
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Definition
| specific gravity of gases |
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| acetylene manifold systems must be equipped with |
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Definition
| a hydraulic flashback arrestor |
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Term
| archimedes principle regarding bupyancy states taht |
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Definition
| a body immeresed in a fluid loses as much weight as the weight of the fluid it displaces |
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| ladder rails must extend how many feet over the landing |
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| the temperature on the fahrenheit scale where all molecular biology activity stops is |
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| the designation for extra strong steel pipe is |
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| one square foot contains approximately |
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Definition
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| acetylene hoses are usually colored |
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Definition
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| the ability of metal to regain its original form after it has been deformed is called |
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Definition
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| a bourdon tube is often found in a |
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Definition
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| when tightenting flange bolts at pipe assembly which of the following should not be done |
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Definition
| tighten bolts in a circular rotation |
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| after acetylene cylinders are stored or transported in a horizontal position shall be placed in a vertical position for at least ____ before use |
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Definition
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| what are the best terms to describe fall protection |
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Definition
fall prevention and fall arrest
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| which valve type has the least restriction to water flow |
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Definition
| material safety data sheets |
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| how high a column of water can be supported by atomospheric pressure whena complete vaccum is maintained on top of the column |
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Definition
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| metals are made with varying proportions of allows to |
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Definition
| modify their characteristics |
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Term
| the piping which is resistant to chemical reactions and cannot be solvent welded is |
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Definition
polypropylene (PP)
Acrylonitrile butadiene styrene (ABS) |
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| the piping that is resistant to corrosion and high temperatures is |
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Definition
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| the piping which is highly resistant to chemcials but not very temperature resistant is |
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Definition
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| the piping which is highly resistant to strong acids, alkalis, salt solutions, alcohols and bacteria is |
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Definition
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| the three basic standards used to describe the final dimensions of commonly used piping and tubing are iron pipe size (IPS), ACR copper tithing and |
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Definition
| copper tubing standard (CTS) |
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Term
| glass piping can withstand |
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Definition
| high and low temperatures |
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Term
| a pipe that is described as NPS 3 has roughly a 3" |
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Definition
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| a nps 2 iron pipe and a nps 3 copper tube will have |
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Definition
| different outside diameters |
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| schedule numbers indicate approximate values of pressure stress rations times |
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Definition
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| a refrigeration tube with a nominal size of 3/4" will have an outside diameter of |
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Definition
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| the type of copper tubing found in the finned core of heat transfer units is |
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Definition
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| some plastics are protected frome exposure by |
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Definition
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| plastic piping is described by three different wall thickness standards: SDR, IPS (schedule numbers) and |
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Definition
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| a long quarter bend is probably used to change direction of piping |
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Definition
| in a drainage waste and vent system |
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Term
| excessive pipe motion caused by temperature changes is by spedally designed supports and hangers |
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Definition
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Term
| expansion loops minimize the risk of damage to piping and attached compnets by |
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Definition
| expanding at half the rate of piping |
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Term
| electrolysis will only occur in the presence of an electrolyte in most piping systems the electrolyte will be |
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Definition
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| what type of piping is likely to require more closely spaced hangers and supports |
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Definition
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| if you are installing copper tubing what is an important factor you should consider when selecting hangers and supports |
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Definition
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| why should you consider the material of structural members, floors or ceilings befre selecting hangers and supports |
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Definition
| to determine the method of fastening and type of fasteners required |
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Term
| a split ring or clevis hanger might be chosen if |
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Definition
| the position of piping might require adjustment after installation |
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Term
| a waster plate helps to cut certain ferrous alloys by |
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Definition
| diluting the slag with iron |
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Definition
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| an effective way to slow the cooling rate of the kerf area is too |
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Definition
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| surface hardening is a result of |
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Definition
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| one technique often used to control distortion is to |
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Definition
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Term
| where might a welder most likely encounter zinc |
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Definition
| as a coating on sheet metal |
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Term
| the protective slag shield is formed when you cut cast irons or alloy steels because the |
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Definition
| oxide has a higher melting temperature than the base metal |
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Term
| the oxygen cylinder safety device may rupture if |
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Definition
| the cylinder is exposed to excess heat |
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Term
| which fuel gas requires the least amount of oxygen to produce a neutral flame |
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Definition
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Term
| acetylene cylinders are filled with |
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Definition
acetone and a porous material
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Term
why should acetylene cylinders never be completely emptied
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Definition
acetone would be drawn into the line
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Term
| the safety device on an oxygen cylinder is located on the |
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Definition
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Term
| at waht pressure is oxygen stored in cylinders at room temperature |
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Definition
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Term
| before you open cylinder valves, the adjusting screw ont he regulator should be |
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Definition
| backed out until tension is reduced |
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Term
| what is the safety mechanism on acetylene cylinders |
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Definition
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Term
| to increase the working pressure on acetylene regulators you would |
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Definition
| turn the handle clockwise |
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Term
| which fuel gas requires the most oxygen to be supplied in order to produce a neutral flame |
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Definition
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Term
| what is the primary function of a regulator |
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Definition
| reduce pressure fromt he cylinders and maintain constant flow |
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Term
| if the oxygen pressure is too high while cutting the result is |
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Definition
| an enlarged bell shaped kerf |
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Term
| at what angle should the cutting torch be held to cut material 6 mm (1/4") or less |
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Definition
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| formula for solving perimiter of a rectangle |
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Definition
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| cross sectional area formula |
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Definition
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