Plumbing and Piping Fundamentals, Exams of Engineering

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____________is not a normal additive in lubrication - ANS-Hexihydrene ________are used for multigrade oils - ANS-Polymers A _________ is a direct or in direct connection Which may permit waste sewage or other non-potable water to flow into a potable water source or supply - ANS-Cross connection A 1/4 bend changes the direction of the pipe - ANS-90 degrees A branch steam line take off the main, should come of the: - ANS-Top of the main A device such as a sink, lavatory, toilet or shower stall is called a - ANS-fixture A drainage fixture unit (dfu) is equivalent to how many gallons of water flow? - ANS-71/ gallons per minute A foot valve may sometimes be used on the submerged end of the suction pipe of a centrifugal pump; - ANS-To keep the pump primed A foot valve may sometimes be used on the submerged end of the suction pipe of a centrifugal pump: - ANS-To keep the pump primed A gate valve would be Used in a application where you need to control the flow of a fluid

• ANS-True A hole is to be drilled in a part. How can the dimensions of the hole be indicated most conveniently on a drawing of the part? - ANS-A brief note connected by a leader to the hole A horse power is equal to_______ foot lbs. per minute - ANS-33, A plane journal bearing operating at a slow speed should be lubricated - ANS-With oil having a high viscosity A sprinkler head that is mounted in an inverted position is called - ANS-Pendent, Conventional, Flush Pendant( all of the above) A standard grade, pitch, fall, or slope of a horizontal drainage system should not exceed
• ANS-1/4" per foot

A well used to fill a corner, as in a lap joint or a T joint, is called - ANS-Fillet weld Absolute pressure is Gauge - ANS-Pressure plus 14.7 psi And oxygen/acetylene system is used for the following purposes - ANS-Silver soldering copper and brass joints, cutting metal, brazing (all of the above) Baffles in a greased interceptor reduce____________ within interceptor - ANS- Turbulence Before a second bead is laid over or next to a just completed bead in arch welding, the weld area must be: - ANS-Cleaned to remove all slag Black iron pipe is often used for: - ANS-Steam heating, Gas and air pressure piping, hot water heating (all of the above) Branch fittings are identified by right and left by - ANS-holding the inlet towards the observer with outlet down Brazed cast fittings should be cooled - ANS-Slowly Class A fires are those of ordinary combustible materials such as wood, paper and cloth where cooling, soaking or coating of the burning materials is essential - ANS-True Consumable metallic electrodes used ac arc welding are usually of what type - ANS- Heavily coated Continual problems with Belt turnover are likely to be caused by - ANS-Improper installation technique Critical points of a grease interceptor or elevations of the__________ and _________ in to the water - ANS-Inlet: outlet Curb cock - ANS-A Valve insert it in a water line between the corporation stop and the water meter is generally called For electrodes up to 3/16 inch in diameter, the length of the arc should be kept to approximately: - ANS-1/4inch Gate valves - ANS-Have less pressure dropped than most other kinds of valves, Are available to quick opening models A&B Gloves for use in Welding should have - ANS-Long cuffs Grease are classified as their mobility and oil content by the - ANS-S.A.E

If a coupling is not properly aligned - ANS-It will almost certainly fail more quickly than his should & it could wear out equipment bearings A&C If a fixture trap has excessive outlet distance or the pitch is excessive__________could occur: - ANS-self-syphon If an object is drawn 1/4 scale, the scale of the drawing is: - ANS-1/4"=1' If the packing has just been replaced on a pump and it leaks slightly at start up, first - ANS-The slight leakage is normal, monitor for excessive licking and adjust appropriately In most cases, belt life is most affected by - ANS-Sheave alignment Its a good idea to have as little suction lift as possible. Normally you shouldn't have more than_____ feet of lift on the suction side of a pump. - ANS- Needle valves - ANS-Are similar in design to globe valves Of the following, which is the most critical factor regarding the suction lift of a pump handling water - ANS-Distance On a plan scale 1/8 of an inch equals 1 foot, 2 1/2 inches on a ruler scale - ANS-20 feet On a site development plan drawn to a scale of 1"=10'0 a 40'x80' building would be drawn: - ANS-4"x8" One cubic foot of water is how many gallons? - ANS-7. One of the most positive means of preventing back siphonage is the proper use of an - ANS-Air gap Parallel alignment is - ANS-Where the centerline of the two shafts are parallel Pipe L cooper is - ANS-Blue Pipes and tubing are measured in________methods - ANS-Different Plug valves: - ANS-Go from full open to completely closed with a quarter turn of the handle Power equals - ANS-Force times distance divided by time Priming means - ANS-Putting fluid into the suction side of a pump Purging of the hose lines of oxygen/acetylene torch should occur: - ANS-When securing the rig for the day

Removal of solids such as rock, meatal, and sand is accomplished with a __________interceptor - ANS-Sediment Screens or shields should be used in welding operations to protect: - ANS-Nearby workers Smoke detection is usually accomplish by using either photo electric scanning, ionization chambers or smoke deflection devices? - ANS-True The basic purpose of a plumbing trap is - ANS-To act as a water seal and prevent odors and gases from escaping into the living space The basin wrench is used primary for the removal of nuts and small piping pieces from the underside of sinks and lavatories - ANS-True The coding on a metallic electrode - ANS-Stabilizes the arc and controls oxidation The correct sequence of soldiering procedure is - ANS-Cleaning, rimming, fluxing, Assembly, and soldering The device used to measure battery acid strength is - ANS-Hydrometer The filter lenses required for eye protection for welding is designed to safeguard the eyes from - ANS-Ultraviolet rays The long run pin on a 115 V electrical plug - ANS-Is a safety ground and should never been removed The main purpose of lubrication usually is to - ANS-Reduce friction and wear The most common type of pump in use for circulation of water today is the - ANS- Centrifugal The number of sprinklers that can be placed on a given pipe is governed by: - ANS-Pipe size The primary disadvantage of a single stage centrifugal pump is that the head at shich it will effectively pump against is limited - ANS-True The recommended flame for brazing is: - ANS-Neutral The scale of a drawing is the ratio of: - ANS-Drawing dimensions to object dimensions The scale of a working drawing can be determined by - ANS-This scale will be indicated on the drawings

the seal in a centrifugal pump may be necessary; - ANS-to prevent fluid form leaking out around the shaft , To prevent air from leaking into the pump. A&C The simplest pump and the least expensive is the: - ANS-Jet The sprinkler system with sprinklers which they open all the time is the_______ system

• ANS-Deluge The strength of a trap seal can be increased by installing___________Without violating the plumbing code - ANS-Extra deep trap The volume of waste entering a grease trap is limited to - ANS-A flow control fitting Threaded pipe standard length is: - ANS-21 feet To check sheave wear - ANS-Measure each groove angle To protect a pump and motor against slight misalignment, they are often connected by a
• ANS-Flexible coupling To reduce slippage________ is applied to a strap wrench - ANS-Resin Torches should be inspected for leakage at the - ANS-Tip, valves, hose connections all of the above Traps are installed to prevent_________ from entering the structure - ANS-Sewer gas, offensive odors, vermin (all of the above) Tubing is sized by measuring the : - ANS-O.d Type K copper is color coded - ANS-Green Type M cooper is - ANS-Red or pink Usually if the motor in the system feels hot and you think this is overloading, you should not open the flow valve further because - ANS-Increase flow will usually increase horse power requirements Variable pitch sheaves may be used in some cases to provide which of the following types of speech changes - ANS-Small Viscosity is - ANS-The ability of a lubricant to flow Water fire suppression system require: - ANS-Pumps, Storage tanks, (both A &B)

We can change the performance of a given pump by changing the speed at the impeller edge. This can be done by: - ANS-By changing the rpm, by changing the impeller diameter (A&B) What can over tightening the belt cause - ANS-Premature bearing failure, premature belt failure A&B What is the main purpose of the emergency electrical power system - ANS-Run equipment essential to human life for safety What methods of measuring is used to measure the full length of pipe? - ANS-End to end What term best describes water use for both drinking and cooking - ANS-Potable When assembling a large diameter screw pipe a _________Wrench is generally use - ANS-Chain When attempting to locate a gas leak the sense of______ is generally not used - ANS- Taste When installing a P trap the vertical distance from the fixture to the _________ may not exceed 24" - ANS-Crown wear When installing a P-trap, the vertical distance from the fixture to the__________ may not exceed 24" - ANS-Trap outlet When severing a length of 2 inch pipe it is preferable to use - ANS-A pipe cutter When Starting a centrifugal pump That is part of a manifold with no check valves - ANS- You should open the suction valve, start the pump and open the discharge valve slowly When welding galvanized metals in a confined space it is vital to make sure the area is well ventilated: - ANS-True When you find a chisel that has a mushroomed head, you should, - ANS-Grind the head down to its proper shape Which is not a trap? - ANS-Tee-trap Which of the following alarms will start a diesel fire pump - ANS-Waterflow alarm Which of the following best describes the basic types of sprinkler systems in a building - ANS-Standard wet type system, Standard dry type system, deluge system ( all of the above)

Which of the following is of little consequence when selecting the correct packing for a particular service - ANS-Location of equipment upon which it will be installed Which of the following liquids is the most viscose - ANS-Molasses Which of the following metals is not generally considered as suitable packing material? - ANS-Chrome- steel which of the following methods of measuring is best used for a piece of pipe which will have fitting screwed on only one end? - ANS-end to center Which of the following would not be a cause of a centrifugal pump failing to deliver water? - ANS-Slight leakage of the packing