General Maintenance BOMA Pre-Quiz(with 100% correct answers).docx, Exams of Biology

Download General Maintenance BOMA Pre-Quiz(with 100% correct answers).docx and more Exams Biology in PDF only on Docsity! General Maintenance BOMA Pre- Quiz(with 100% correct answers) When starting a centrifugal pump that is part of a manifold with no check valves. - answer You should open the suction valve, start the pump and open the discharge valve slowly. A valve inserted in a water line between the corporation stop and the water meter is generally called. - answer Curb cock To check sheave wear. - answer Measure each groove angle Variable pitch sheaves may be used in some cases to provide which of the following types of speed changes - answer small Absolute pressure is gauge - answer Pressure plus 14.7 psi Which of the following best describes the basic types of sprinklers systems in a building - answer Standard wet-type system, Standard dry-type system, A deluge system Power equals - answer Force x distance divided by time Torches should be inspected for leakage at the - answer Tip, Valves, Hose connections Critical points of a grease interceptor are elevations of the _____ and _____ in to the water: - answer Inlet, outlet One of the most positive means of preventing back siphonage is the proper use of an? - answer air gap Should safety glasses be worn when using a hack saw? - answer yes One cubic foot of water is how many gallons? - answer 7.48 A weld used to fill a corner, as in a lap joint or a t joint, is called a? - answer Fillet weld Greases are classified as to their mobility and oil content by the? - answer S.A.E. Continual problems with belt turnover are likely to be caused by? - answer Improper installation technique The scale of a working drawing can be determined by? - answer The scale will be indicated on the drawing A _______ is a direct or indirect connection which may permit waste sewage or other non-potable water to flow into a potable water source or supply? - answer Cross connection Traps are installed to prevent ________ from entering the structure? - answer sewer gas, offensive odors, vermin, all of the above. The main purpose of lubrication is usually to? - answer Reduce friction and wear. When installing a p-trap, the vertical distance from the fixture to the ________ may not exceed 24". - answer Trap outlet A gate valve would be used in an application where you need to control the flow of a fluid. - answer False, Globe valve to control. Purging of the hoses lines of an application where yoy need to control the flow of a fluid. - answer when securing the rig of the day. An oxygen/acetylene system is used for the following purposes? - answer silver soldering copper and brass joints, cutting metal, brazing, All of the above. Needle valves: - answer are similar in design to glove valves. If the packing has just jemust been replaced on a pump and it leaks slightly at start-up, first : - answer The slight leakage is normal, monitor for excessive leaking and adjust appropriately. (normal leak is 1 leak per second) The volume of waste entering a grease trap is limited to: - answer A flow control fitting The seal in centrifugal pump may be necessary: - answer To prevent fluid from leaking out around the shaft, To prevent fluid from leaking out around the pump flanges. A branch steam line take off the main, should come off of the ? - answer top of the main. safety shields and goggles are not required to be worn if you wear glasses? - answer false threaded pipe standard lenght Is? - answer 21 feet 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? - answer A brief note connected by a leader to the hole. which is not a trap? - answer tee-trap if a fixture trap has excessive outlet distance or the pitch is excessive _________ could occur. - answer self-syphon if an object is drawn 1/4 scale of the drawing Is? - answer 1/4"=1'0 Before a second bead is laid over or next to a just complete bead in arch welding, the weld area must be be: - answer Cleaned to remove all slag Screens or shields should be used in welding operations to protect? - answer Nearby workers For electrodes up to 3/16 inch in diameter, the length of the arc should be kept to approximately? - answer 1/4 inch The basin wrench is used primarily for the removal of nuts and small piping pieces from the underside of skins and lavatories? - answer True A drainage fixture unit (dfu) is equivalent to how many gallons of water flow? - answer 7 1/2 gallons per minute Removal of solids such as rock, metal, and sand is accomplished with a _______ interceptor: - answer Sediment Consumable metallic electrodes used in arc welding are usually of what type? - answer Heavily coated What type of gasket material is recommended for water which flows? - answer Sheet rubber /cloth inserted rubber Class "A" fires are those of ordinary combustible materials such as wood, paper, and cloth where cooling, soaking, or coating of the burning material is essential? - answer True We can change the performance of a given pump by changing the speed at the impeller edge, this can be done by: - answer By changing the RPM, and by Changing the impeller diameter When you find a chisel that has a mushroom head, you should: - answer Grind the head down to its proper shape Which of the following metals is not generally considered as a suitable packing material? - answer Chrome-Steel On a site development plan draw to a scale of 1" = 10'0", a 40'x80' building would be drawn: - answer 4"x8" When welding galvanized metals in a confined space it is vital to make sure the area is well ventilated ? - answer True A 1/4-bend changes the direction of the pipe: - answer 90 degrees The device used to measure battery acid strength is: - answer Hydrometer The simplest pump and the least expensive is the : - answer Jet pump Which of the following is of little consequence when selecting the correct packing for a particular service? - answer Location of equipment upon which it will be installed Black iron pipe is often used for: - answer Steam heating, gas and air pressure piping, hot water heating. The basic purpose of a plumbing trap is? - answer To act as a water seal and prevent odors and gases from escaping into the living space The scale of a drawing is the ratio of: - answer Drawing dimensions to object dimensions Tubing is sized by measuring the: - answer O.D The recommended flame for brazing is: - answer Neutral Brazed cast fittings should be cooled: - answer Slowly The number of sprinklers that can be placed on a given pipe is governed by: - answer Pipe size A foot valve may sometimes be used on the submerged end of the suction pipe of a centrifugal pump: - answer To keep the pump primed Priming means? - answer Putting fluid into the suction side of a pump