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BOMA General Maintenance Exam Best Answers 2024-2025, Exams of Health sciences

BOMA General Maintenance Exam Best Answers 2024-2025 Usually if a motor in a system feels hot and you think it is overloading you should not open the flow valve further because?

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BOMA General Maintenance Exam Best

Answers 2024- 2025

Usually if a motor in a system feels hot and you think it is overloading you should not open the flow valve further because? Increase in flow will usually increase the horsepower requirements. Net positive suction head is? The amount of absolute pressure actually available at the suction inlet of the pump to force the liquid up the pump. If the seal has just been replaced and if the pump leaks slightly at start up, first? Allow the pump to continue to run for a short period of time and see if the leak stops. If it is ever necessary to reduce the pump flow temporarily, do so by? Throttle the discharge There are several methods used to detection of incipid fires, temperature sensing and smoke detections are the primary one? True Smoke detection is accomplished by either photoelectric scanning, ionization, chambers, and smoke detection devices? True A sprinkler system with sprinklers that stay open all the time is a? deluge Sprinkler heads that are mounted in an inverted position is called a? pendant, conventional, flush pendant. The number of sprinkler that can be placed on a given pipe is governed by? The pipe size In a fire sprinkler system there two main types of sprinkler heads, upright and pendant? True Which of the following best describes the basic types of sprinkler systems in a building? Standard wet system, standard dry system and deluge system. The most important component in a sprinkler system is? A reliable source of water, sufficient volume of water and sufficient water pressure. Connection between a given building fire protection system and the public water supply are controlled by? Post indicating valves The class of standpipe system is determined by? GPM capacity, hose connection size and personnel who uses it As to the content of portable fire extinguishers which of the following answers is not correct? Carbon monoxide Class "A" fires are those of combustible materials such as wood, paper, cloth. Where cooling, soaking or cloaking the burning materials essential? True

Class "A" fires are those flammable liquids, gases and greases which blanketing, smothering or extinguishing agents are essential or flame interrupting affect is needed.? False Class "C" fire are those involving energized electrical equipment where non-conductive or extinguishing agents are essential? True 1 cubic feet of water is how many gallons?

A horsepower is equal to _____? 33,000 foot pounds of work per minute Capacity of an air compressor is usually expressed in cubic feet per minute? True Temporary platforms used by to support workers and materials while working off the ground is usually called a _____? scaffolding A device used to measure battery acid strength is a _____? Hydrometer Brazed cast fittings should be cooled with _____? A damp cloth When attempting to locate a gas leak the sense of _____ is usually not used. Taste Regulator gauges are to _____. Indicate tank pressure and indicate gas pressure to the torch. Torches should be inspected for leakage at _____. The tip, valves, and hose connections. So that it can be turned off quickly in an emergency, the acetylene valve should be opened _____. ¼ turn Purging the hose lines on a oxy-acetylene torch should occur _____. When securing the rig for the day. Recommended flame for brazing is _____? Neutral An oxy-acetylene system is used for the following purposes. Silver soldering copper & brass joints, cutting metal and brazing. When welding galvanized metals in a confined space, it is vital to make sure the area is well ventilated. True *The filter lenses are required for eye protection in welding and cutting operation and are designed to safeguard the eyes from injuries from what types of rays? Ultraviolet/infrared and visible Flux is _____? A cleaning substance to be used when soldering. Electrical tools should not be operated when either the tool or the operator is in contact with _____? Flammable gases and water A long pin on a 115-volt electrical plug _____?

Is a safety ground and should never be removed. When working with electricity it is _____? Perfectly safe to use a wooden ladder & perfectly safe to use a fiberglass ladder. Oxygen under pressure should never be allowed to come in contact with _____? Oil Should safety glasses been worn when using a hacksaw? Yes What's the purpose of a safety lock-out program. To protect the circuit you are working on, to protect the life of the person working on the circuit and to protect the employer from a lawsuit. Under CAL-OSHA Act, one of your rights is _____? Not to work on or in any environment that you believe presents a health safety hazard. Safety shields and goggles are not required to be worn if you wear glasses? False Power tools are okay to use with frayed cords as long as it is an engineer that is using them. False Filter lenses of what shade number are recommended for arc welding and cutting with a range of 30-75 amps? 8 A welding defect consisting of a void or cavity produced by gases trapped in a solidified hot metal is called a _____? Blow hole A weld used to fill a corner as in a lap joint or a T-joint is called a _____? Fillet weld Gloves for use in welding should have _____? Long cuffs. Eye protection for in welding electric arc welding and cutting operation is provided by _____? A filtered lens and a helmet. Screens or shields should be used in a welding operation to protect _____? Nearby workers Electric arc welding and welding heat is produced by the passage of heavy electrical current through a resistance of an _____? Air gap Rays emitted from electric welding can cause _____? Serious burns The term straight polarity in arc welding means that welding circuit is arranged so that the polarity of the electrode is _____. Positive to negative Consumable metal/metallic electrodes used in AC arc-welding are usually of what type? Heavy coated. Before a 2nd bead is laid over a just completed bead of arc welding, the weld must be _____? Cleaned and removed of all slag

Most arc welding employs consumable metal/metallic electrodes, the electrodes should be _____? of the same type metal as the base metal The coating on a metallic electrode _____. Stabilizes the arc and controls oxidation For electrodes of up to 3/16ths the length of the arc should be kept to approximately _____? The diameter of the electrode For electrodes over 3/16ths in diameter the length of the arc should be kept at approximately _____? The diameter of the electrodes/3/16th (the distance of the diameter) To make a weld that is sound and dependable, the edges and the pieces of the metal must be thoroughly cleaned and correctly shaped so that good fusion will occur with the least possible _____? Heat If the current increases in an arc welding operation _____. The voltage must be increased. The scale of a drawing is a ratio of _____? Drawing dimensions to object dimensions If an object is drawn ¼ scale, the scale of the drawing is _____? ¼ in. = 1 foot On a site development plan, a plan drawn to a scale of 1 in. equals 10 feet. A 40 foot by 80 foot building would be drawn as a _____? 4 in. x 8 in. A scale of a working drawing can be determined by _____? The scale would be indicated on the drawing. When some dimensions must be omitted in the making of a working drawing, the ones given should be _____? Those that are most needed for understanding the drawing A hole is drilled in a part. How can the dimensions in the hole be indicated most conveniently on a drawing of the part? ??? Power =? force times distance divided by time A type of drawing that shows all parts in the mechanism but separates them from one another is called an _____? Exploded view Structural drawings are drawings of the building's _____? Framework, floors, foundation & roof. One plan scale is 1/8 in. = 1 foot. 2 ½ in. on a ruler on the scale would equal how many feet? 20 feet One disadvantage of pictorial drawings is generally they _____? Do not accurately represent the object. An orthographic view shows only sides or faces of an object? 1

The true shapes of objects cannot be visualized from a _____? Single orthographic view Before striking an arc, the welder must make sure that _____? Other in the area are warned to protect their eyes. Work is _____? Force x distance What type of gasket material is recommended for water which flows? Sheet rubber/cloth inserted rubber The twist in a shaft has one end fixed and the other which is twisted toward the force that's applied. It is called _____? Torque One horsepower = _____? 746 watts One kilowatt = _____? 1,000 watts What is domestic water subjected to when it is taken from streams, rivers, lakes and ponds? Hardness increases A valve inserted in the water line between the corporation/corporate stop and the water meter is generally called a space____? Curb cock If he fixed your trap has excess about the distance for the pitch is excessive _____ could occur? Self siphon A pipe which is used to carry away human waste is called a _____? Soil pipe Baffles in an interceptors reduce _____ within interceptors? turbulence One of the most positive means of preventing back siphonage is the proper use of an ____? Air gap The strength of the trap seal can be increased by installing _____ without violating the plumbing code? An extra deep trap (no more than 4" deep) What are disadvantages in using water for fire suppression? Damages contents, conducts electricity & floats on oil. *What percentage of building water is used for landscaping? 30 percent (Rob not sure) *What desired quality should make up water be used for in the heating and cooling process? Soft and neutral (Rob not sure) What desired quality should make up water be used for in a steam heating process? Soft, treated & neutral A quarter (1/4 of an inch) bend changes the direction of the pipe _____? 90 degrees A common pipe dope can be used on plastic pipe threads?

False Galvanized pipe is dip in _____ to protect its surface from abrasive and corrosive materials? Zinc Nominal measure refers to the size of the pipe's _____? Inside Diameter Schedule 80 is equal to extra heavy cast iron pipe and wall thickness? False Type L copper tubing is color coded _____? Blue In single type silicone greases can function in what temperature ranges in degrees Fahrenheit?

  • 20 to 450 The main purpose of lubrication is usually to _____? Reduce friction and wear What happens to a lubricating oil when moisture contaminates it? The water combines with the carbon content of the oil and starts to form acid when in turn attacks the metal surfaces. A light oil has _____? Low viscosity index There are three types of lubrication. Liquid, solid and semi-solid Parallel alignment is _____? Where the center lines of the two shafts are in parallel. What can over tightening of the belt cause? Premature bearing failure and premature belt failure *A38 and AX38 belts should not be mixed on a drive design to use AX38 belts because? They require different sheaves for their use (Rob not sure) If it is ever necessary to reduce pump flow temporarily, do so by _____? Throttling the discharge What type of packing should be selected for low-pressure steam conditions where softness and lubrication are desirable characteristics? Braided Which of the following metals is not generally considered as a suitable packing material? Chrome steel *Needle valves are _____? Similar in design to globe valves (Rob doesn't agree with any answers) *Needle valves are_____? Have a relatively small pressure drop/Are designed for throttling applications/are designed for throttling processes (Rob not sure) What is a principal use for smoke detection? Particle sensitivity What type of smoke detector acts like a fusible link in the sprinkler head? Heat actuated detector

Which of the following alarms will start diesel fire pump? flow alarms A _____ is a direct or indirect connection which may permit waste or sewage or either non potable water to flow into a potable water source or supply. Cross connection *Water in its natural state to have a pH is high as_____. 7 *Oil interceptors differ from grease interceptor in two important ways, principal differences are the _____ and _____. Draw off system / requirement for vents (Rob not sure) The drainage fixture unit is equivalent to how many gallons of water flow? 7.5 GPM Lawn sprinklers are inefficient irrigation devices because of what losses? Evaporation and runoff *Which of the following approaches is use for water conservation in landscaping? Bubblers, drip irrigation and sizing water pipe Solder joints can be used when connecting _____. Industrial water lines Threaded pipe is usually available in lengths of _____. 21 feet Black iron pipe is often used for _____? Steam heating, gas and air pressure piping & hot water heating When will closed loop hot water or chilled water systems require make up water? Seldom The device such as a sink lavatory, toilet or shower stall is called a _____. Fixture Type K copper tubing is color coded_____. Green Which of the following types of load make the most significant contribution to sliding friction between two machined surfaces? Adhesion In broad terms, greases are compounded from internal oils and what additives? Soap Greases are clarified as to their mobility and oil content by the _____. SAE There are three types of load or drag that comprise sliding friction. Which of the following is inappropriate to the list? Scuffing In some instances when installing the cone of a tapered roller bearing on a shaft, it becomes necessary to chill the shaft and heat the bearing. How is the latter operation accomplish? Heat it to 250°F in hot oil Roller chain connecting pins may be held by which of the following? Spring clips, cotter pins and riveting Variable pitch sheaves may be used in some cases to provide which of the following types of speed changes?

Small To check sheave wear to see if the belt bottom out in the _____. Measure each groove angle When you find a chisel that has a mushroom head, you should _____. Throw it away because it is a safety hazard/grind the mushroom down to its proper shape There are six general rules when installing the V-belts, one of them is _____. Recheck the belt tension after 24 or 48 hours of operation One of the first signs of a failing bearing is a rise in temperature increase in sound. True The basin wrench is used primarily for the removal of the small nuts and piping pieces from the underside of sinks and lavatories. True The best tool to use on refrigeration valves that have no handles is _____? Refrigeration wrench When using a hacksaw, you should always release pressure on the backstroke to allow for the teeth to clear. True With direct event is obtained with keeping operating equipment and the surrounding areas cleaned and painted? Save environment, pride and ecological Work equals? Force times distance Which of the following is a little consequence for selecting the correct packing for a particular surface? Location of the equipment to which it will be installed Throttling means is used to _____? Reduced flow or pressure but still allow some flow Globe valves should be used for whatever you have the need for full flow. False When stopping a centrifugal pump with no check valve, it is good engineering practice to _____? Close the discharge valve first The impeller keeps the fluid _____. Slings the fluid to be outside Which of the following would not be the cause of a centrifugal pump failing to deliver water? Slight leakage of packing The simplest pump and the least expensive is the _____. Jet When starting a centrifugal pump that is part of a manifold with no check valves, _____. Open the suction valve, start the pump, then open the discharge valve slowly *What is necessary in the zone coded annunciator system? zone light of annunciator panel (Rob isn't sure) *Emergency power systems must supply power when local power fails to _____. exit lights and stairs lights (Rob isn't sure)

Which of the following alarms start the fire pumps? Flow alarms How much power be supplied the fire pumps in Los Angeles according to the Los Angeles Fire Department? ? Fire pumps supply pressurized water to two fire suppression systems, they are_____. Wet standpipe and sprinkler systems In the event of a conflict between working drawings and job specifications, the _____. Architect or senior engineer would issue a binding decision When using a grinder it is perfectly acceptable to grind aluminum. False On severing the length of a 2 inch pipe it is preferably to use a_____. Pipe cutter Slip joint pliers or channel lock pliers as they are commonly known are an acceptable tool to use upon chrome fixtures. False What type of wrench should be used to hold or turn chrome pipes? Strap wrench Which procedure is correct for flare joints? Cut, ream, install flare nut and flare Continual problems with belt turnover are likely to be caused by_____. Belt de-lip, the use of belt dressing and improper installation technique Approximately how often should lighting fixtures be cleaned? Yearly Why must care be taken in keeping lubricants clean? Lubricants can be contaminated in storage have to be disposed of One horsepower equals? 746 watts Which of the following types of pumps will not be suitable for pumping large volumes of water against low heads or low pressures? Centrifugal In the flow of water from the centrifugal pump should be stop by closing the discharge valve with the pump still running, the _____? Pressure will increase rapidly Of the following, the most is the critical factor regarding the suction lift of a pump handling water? Distance *How do you change pressure from PSI to feet of water? Multiply by 2. What can change the performance of a given pump, by changing the speed at the impeller edge, which can be done by _____? Changing the RPM and changing the impeller diameter The pipe that connects the base of the stack of a sanitary sewer to the public sewer is a _____? Building drain A toilet auger is a device to remove toilets from their foundations?

False Traps are installed to prevent _____ from entering the structure? Sewer gas, offensive odors and vermin The relationship of a three element grease interceptor (grease trap) is critical. The elevation of the _____ and _____ in relationship to the static water line? Inlet/outlet Interceptors are designed to _____? Separate hazardous material from waste Toxic waste may be _____ or _____ before being discharge into the drainage system? Diluted/neutralized Removal of solids such as rock, metal or sand can be accomplished with an _____ interceptor? Sediment The total drop or fall permitted in a horizontal pipe from the outlet of a trap is _____? equal to the diameter of the pipe The volume of waste entering a grease trap is limited by _____? flow control fitting Basic purpose of a water trap is _____? Act as a water seal preventing odors and gases from entering When installing a P-trap, the vertical distance from the fixture to the _____ (the depth that comes into the trap itself), may not exceed 24 inches? Crown weir When ordering fitting, the letters are used to designate the _____. kind of fitting Branch fittings are identified as right or left by _____? Holding the inlet to you/outlet down then determine left or right. Hub and spicket pipe is identified by _____? Diameter, pipe weight and pipe length Which of the following is not a trap? U-trap Pipes and tubing are _____, when regarding to copper. Different (tubing is measure by O.D. and pipe is measure by I.D.) When joining two length of pipe, you need _____? Two pipe wrenches with jaws locked in different direction. Which type of pipe is approved by N.S.F. for potable water system? A.B.S. What method is used for measuring a full length of pipe? End to end Which of the following is the best method used for measuring a piece of pipe with a fitting screwed on it? End to center Plastic pipe has a tensile strength rated to the nearest 100 pounds? True Rigid pipe is usually available in lengths of 10 or 25 feet? False An 1/8 bend changes direction of a pipe _____?

45 degrees The correct sequence of soldering is _____, _____, _____, _____ and _____? Reaming; cleaning; fluxing; assembling; soldering What is the advantage of soft copper tubing? Length available A foot valve may sometimes be used on the submerged end of the suction side of a centrifugal pump are used to reduced load at starting? Prime kept Soldering joints are used when connecting _____, _____ and _____? Refrigeration lines; domestic water line and hot water line. To reduce slippage, _____ is applied to a trap wrench? Resin Brazed joints are required when copper is used for _____ and _____? Fuel lines and chemical lines. When assembling a large diameter pipe, a _____ wrench may be very helpful? Chain The long round pin on the electrical plug? Is a safety ground At what height is another engineer required as a ladder holder? Over 6 feet. Filter lenses in what shade number are recommended in medium gas welding? 6 *How great a variation from the recommended shade is allowable in a given welding or cutting operation? Two shades darker or lighter/Two shades lighter one shade darker An electrode that contributes globules of molten metal into metal as a filler material is called a _____? Consumable electrode The voltage produced across the arc by a motor generator DC welder is usually in the range of _____. 15 - 45 The best way to determine whether an arc is the right length is to _____? Listen to the arc In general, electrodes used for welding non farris material are of what type? Reverse polarity The coating on a metallic electrode prevents formation of slag because it _____. stabilizes the arc and controls oxidation. Moving an electrode too slowly in a metallic arc-welding, results in _____. a bead that is too high (welds) When the current setting is too high, the metallic bead will be _____. too high To make a weld that is sound, the edge of the piece of the weld must be _____? Cleaned As the welding current is increased, the voltage must be _____. Increased The volume of waste entering a grease trap is limited by the flow control fitting.

True The basic purpose of a plumbing fixture trap is to act as a water seal and prevent odors and gases from within the pipe to enter a living space. True When installing a P-trap in a vertical distance from a fixture, the crown weir (the depth that comes into the trap itself) may not exceed 24 inches. True Quarter bend changes the direction of flow _____. 90 degrees When joining two lengths of pipe, you need to have two pipe wrenches with the jaws locked in opposite direction. True The schedule 40 DWB and PVC pipe is the same as cast iron DWB. True Flux should be applied immediately after _____. cleaning Type M copper is color coated _____. Red What's the major advantage of soft copper tubing over hard drawn copper tubing? The lengths available A foot valve may sometimes be used on a submerged end of the suction side of the centrifugal pump to keep the pump primed. True Solder joints are used when connecting _____, _____ and _____. Refrigeration lines; domestic water; hot and cold heating lines What do you apply to strap wrenches to reduce slippage? Resin What's the best term that describes water use for drinking and cooking? Potable Standard grade, pitch, fall or slope in a horizontal drain system should not exceed ¼ inch per foot. True The common cause of trap seal loss is _____. Evaporation Water is a popular media for fire suppression for which of the following reason? Readily available and low cost; cools and smothers; emulsifies and dilutes Water fire suppression systems require _____ and _____. Pumps and storage tanks Which of the following devices permits activation sprinklers during rainfall? Rain sensor 16th bend in the direction of a pipe is _____. 22 ½ degrees Pipe and tubing is measured in _____ ways. Different The most important single factor in determining prolong effectiveness of oil is its _____. viscosity

Of the service demands of lubricating oils, which of the following is the most precise in critical requirements? Turbine oil To protect the pump or motor against slight misalignment, they often are corrected by the use of a _____. Flexible cuffling How important is alignment in belt driven equipment? One of the most important; the most frequent cause of short belt life The size of a belt is given in letters, i.e., V-belt. The V represents the _____. cross sectional area The two main components of alternating current motors are the _____ and the _____. Rotor; starter After a coupling is aligned, we should recheck it after two weeks to _____. Make sure it's still in alignment when the unit is up and at operating temperature. Parallel alignment is where a center line and two shafts are in parallel. True If a coupling is not properly aligned _____ and _____. it most certainly would fail more quickly than it should; it could wear out other components connected to it Continual problems with belt turning over are likely to be caused by _____. improper installation techniques If a new single sheave V-belt squeals while the motor is running, you should _____. Inspect the sheave for wear. Which of the following is the least likely cause of rapid wear of packing in a pump? Slight leakage from the stuffing box When using a hacksaw, you should always use steady strokes but not fast enough to overheat the blade and cause possible blade damage. True What type of filter would be required when working in an area that demand filters with efficiencies of 99%? HEPA filter What direct benefit is obtained from keeping operating equipment and surrounding areas clean and painted? Pride and safe environment Force necessary to cause a gasket to flow into surface imperfections is known as _____. C-force Which of the following is of little consequence when selecting the correct packing for particular service? The location of the equipment is to be installed Plug valves go from a fully open position to a fully closed position in a quarter turn of the handle. True Gate valves are _____ and _____. available in quick opening models; have less pressure drop than other kinds of valve.

When starting a centrifugal pump, you should open the suction valve, start the pump and then open the discharge valve very slowly. True Positive displacement pumps such a lube oil or a fuel oil pump, usually have an adjustable pressure regulating valve that bypasses from the discharge to the suction of the pump. True A major cause of vibration in pumps is _____ and _____. Pump and motor alignment. Which of the following is the correct procedure when adjusting a gland nut on a newly packed pump? Tighten with the pump running until there is a slight leakage The relationship of a three element grease interceptor (grease trap) are critical, what are they? The elevation of the inlet and the elevation of the outlet in relationship to the standing water line. The components that go to that fixture, the trap, the chrome stuff, the angle stops, the spaghetti, the faucets and all that stuff is _____ for that fixture. Trim What materials and what products do you never put together? Copper and natural gas.