General Maintenance Driver's Permit Manual Tn Exam | Questions & Answers (Verified) | Latest Update | Graded A+

1 GENERAL MAINTENANCE DRIVER'S PERMIT MANUAL TN EXAM | QUESTIONS & ANSWERS (VERIFIED) | LATEST UPDATE | GRADED A+ Usually if a motor in a system feels hot and you think it is overloading you should not open the flow valve further because? Correct Answer: Increase in flow will usually increase the horsepower requirements. Net positive suction head is? Correct Answer: 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? Correct Answer: 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? Correct Answer: Throttle the discharge 2 There are several methods used to detection of incipid fires, temperature sensing and smoke detections are the primary one? Correct Answer: True Smoke detection is accomplished by either photoelectric scanning, ionization, chambers, and smoke detection devices? Correct Answer: True A sprinkler system with sprinklers that stay open all the time is a? Correct Answer: deluge Sprinkler heads that are mounted in an inverted position is called a? Correct Answer: pendant, conventional, flush pendant. The number of sprinkler that can be placed on a given pipe is governed by? Correct Answer: The pipe size In a fire sprinkler system there two main types of sprinkler heads, upright and pendant? Correct Answer: True Which of the following best describes the basic types of sprinkler systems in a building? Correct Answer: Standard wet system, standard dry system and deluge system. 3 The most important component in a sprinkler system is? Correct Answer: 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? Correct Answer: Post indicating valves The class of standpipe system is determined by? Correct Answer: 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? Correct Answer: Carbon monoxide Class "A" fires are those of combustible materials such as wood, paper, cloth. Where cooling, soaking or cloaking the burning materials essential? Correct Answer: 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.? Correct Answer: False 4 Class "C" fire are those involving energized electrical equipment where non-conductive or extinguishing agents are essential? Correct Answer: True 1 cubic feet of water is how many gallons? Correct Answer: 7.48 A horsepower is equal to _____? Correct Answer: 33,000 foot pounds of work per minute Capacity of an air compressor is usually expressed in cubic feet per minute? Correct Answer: True Temporary platforms used by to support workers and materials while working off the ground is usually called a _____? Correct Answer: scaffolding A device used to measure battery acid strength is a _____? Correct Answer: Hydrometer Brazed cast fittings should be cooled with _____? Correct Answer: A damp cloth 5 When attempting to locate a gas leak the sense of _____ is usually not used. Correct Answer: Taste Regulator gauges are to _____. Correct Answer: Indicate tank pressure and indicate gas pressure to the torch. Torches should be inspected for leakage at _____. Correct Answer: The tip, valves, and hose connections. So that it can be turned off quickly in an emergency, the acetylene valve should be opened _____. Correct Answer: ¼ turn Purging the hose lines on a oxy-acetylene torch should occur _____. Correct Answer: When securing the rig for the day. Recommended flame for brazing is _____? Correct Answer: Neutral An oxy-acetylene system is used for the following purposes. Correct Answer: Silver soldering copper & brass joints, cutting metal and brazing. 6 When welding galvanized metals in a confined space, it is vital to make sure the area is well ventilated. Correct Answer: 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? Correct Answer: Ultraviolet/infrared and visible Flux is _____? Correct Answer: 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 _____? Correct Answer: Flammable gases and water A long pin on a 115-volt electrical plug _____? Correct Answer: Is a safety ground and should never be removed. When working with electricity it is _____? Correct Answer: 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 _____? 7 Correct Answer: Oil Should safety glasses been worn when using a hacksaw? Correct Answer: Yes What's the purpose of a safety lock-out program. Correct Answer: 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 _____? Correct Answer: 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? Correct Answer: False Power tools are okay to use with frayed cords as long as it is an engineer that is using them. Correct Answer: False Filter lenses of what shade number are recommended for arc welding and cutting with a range of 30-75 amps? Correct Answer: 8 8 A welding defect consisting of a void or cavity produced by gases trapped in a solidified hot metal is called a _____? Correct Answer: Blow hole A weld used to fill a corner as in a lap joint or a T-joint is called a _____? Correct Answer: Fillet weld Gloves for use in welding should have _____? Correct Answer: Long cuffs. Eye protection for in welding electric arc welding and cutting operation is provided by _____? Correct Answer: A filtered lens and a helmet. Screens or shields should be used in a welding operation to protect _____? Correct Answer: Nearby workers Electric arc welding and welding heat is produced by the passage of heavy electrical current through a resistance of an _____? Correct Answer: Air gap Rays emitted from electric welding can cause _____? 9 Correct Answer: Serious burns The term straight polarity in arc welding means that welding circuit is arranged so that the polarity of the electrode is _____. Correct Answer: Positive to negative Consumable metal/metallic electrodes used in AC arc-welding are usually of what type? Correct Answer: Heavy coated. Before a 2nd bead is laid over a just completed bead of arc welding, the weld must be _____? Correct Answer: Cleaned and removed of all slag Most arc welding employs consumable metal/metallic electrodes, the electrodes should be _____? Correct Answer: of the same type metal as the base metal The coating on a metallic electrode _____. Correct Answer: Stabilizes the arc and controls oxidation For electrodes of up to 3/16ths the length of the arc should be kept to approximately _____? Correct Answer: The diameter of the electrode 10 For electrodes over 3/16ths in diameter the length of the arc should be kept at approximately _____? Correct Answer: 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 _____? Correct Answer: Heat If the current increases in an arc welding operation _____. Correct Answer: The voltage must be increased. The scale of a drawing is a ratio of _____? Correct Answer: Drawing dimensions to object dimensions If an object is drawn ¼ scale, the scale of the drawing is _____? Correct Answer: 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 _____? Correct Answer: 4 in. x 8 in. 11 A scale of a working drawing can be determined by _____? Correct Answer: 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 _____? Correct Answer: 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? Correct Answer: ??? Power =? Correct Answer: 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 _____? Correct Answer: Exploded view Structural drawings are drawings of the building's _____? Correct Answer: 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? 12 Correct Answer: 20 feet One disadvantage of pictorial drawings is generally they _____? Correct Answer: Do not accurately represent the object. An orthographic view shows only sides or faces of an object? Correct Answer: 1 The true shapes of objects cannot be visualized from a _____? Correct Answer: Single orthographic view Before striking an arc, the welder must make sure that _____? Correct Answer: Other in the area are warned to protect their eyes. Work is _____? Correct Answer: Force x distance What type of gasket material is recommended for water which flows? Correct Answer: 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 _____? Correct Answer: Torque 13 One horsepower = _____? Correct Answer: 746 watts One kilowatt = _____? Correct Answer: 1,000 watts What is domestic water subjected to when it is taken from streams, rivers, lakes and ponds? Correct Answer: Hardness increases A valve inserted in the water line between the corporation/corporate stop and the water meter is generally called a space____? Correct Answer: Curb cock If he fixed your trap has excess about the distance for the pitch is excessive _____ could occur? Correct Answer: Self siphon A pipe which is used to carry away human waste is called a _____? Correct Answer: Soil pipe Baffles in an interceptors reduce _____ within interceptors? 14 Correct Answer: turbulence *One of the most positive means of preventing back siphonage is the proper use of an ____? Correct Answer: Air gap/siphon break The strength of the trap seal can be increased by installing _____ without violating the plumbing code? Correct Answer: An extra deep trap (no more than 4" deep) What are disadvantages in using water for fire suppression? Correct Answer: Damages contents, conducts electricity & floats on oil. *What percentage of building water is used for landscaping? Correct Answer: 30 percent (Rob not sure) *What desired quality should make up water be used for in the heating and cooling process? Correct Answer: Soft and neutral (Rob not sure) What desired quality should make up water be used for in a steam heating process? Correct Answer: Soft, treated & neutral 15 A quarter (1/4 of an inch) bend changes the direction of the pipe _____? Correct Answer: 90 degrees A common pipe dope can be used on plastic pipe threads? Correct Answer: False Galvanized pipe is dip in _____ to protect its surface from abrasive and corrosive materials? Correct Answer: Zinc Nominal measure refers to the size of the pipe's _____? Correct Answer: Inside Diameter Schedule 80 is equal to extra heavy cast iron pipe and wall thickness? Correct Answer: False Type L copper tubing is color coded _____? Correct Answer: Blue In single type silicone greases can function in what temperature ranges in degrees Fahrenheit? Correct Answer: -20 to 450 16 The main purpose of lubrication is usually to _____? Correct Answer: Reduce friction and wear What happens to a lubricating oil when moisture contaminates it? Correct Answer: 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 _____? Correct Answer: Low viscosity index There are three types of lubrication. Correct Answer: Liquid, solid and semi-solid Parallel alignment is _____? Correct Answer: Where the center lines of the two shafts are in parallel. What can over tightening of the belt cause? Correct Answer: Premature bearing failure and premature belt failure *A38 and AX38 belts should not be mixed on a drive design to use AX38 belts because? Correct Answer: They require different sheaves for their use (Rob not sure) 17 If it is ever necessary to reduce pump flow temporarily, do so by _____? Correct Answer: Throttling the discharge What type of packing should be selected for low-pressure steam conditions where softness and lubrication are desirable characteristics? Correct Answer: Braided Which of the following metals is not generally considered as a suitable packing material? Correct Answer: Chrome steel *Needle valves are _____? Correct Answer: Similar in design to globe valves (Rob doesn't agree with any answers) *Needle valves are_____? Correct Answer: 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? Correct Answer: Particle sensitivity What type of smoke detector acts like a fusible link in the sprinkler head? 18 Correct Answer: Heat actuated detector Which of the following alarms will start diesel fire pump? Correct Answer: 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. Correct Answer: Cross connection *Water in its natural state to have a pH is high as_____. Correct Answer: 7 *Oil interceptors differ from grease interceptor in two important ways, principal differences are the _____ and _____. Correct Answer: Draw off system / requirement for vents (Rob not sure) The drainage fixture unit is equivalent to how many gallons of water flow? Correct Answer: 7.5 GPM Lawn sprinklers are inefficient irrigation devices because of what losses? Correct Answer: Evaporation and runoff *Which of the following approaches is use for water conservation in landscaping? 19 Correct Answer: Bubblers, drip irrigation and sizing water pipe Solder joints can be used when connecting _____. Correct Answer: Industrial water lines Threaded pipe is usually available in lengths of _____. Correct Answer: 21 feet Black iron pipe is often used for _____? Correct Answer: Steam heating, gas and air pressure piping & hot water heating When will closed loop hot water or chilled water systems require make up water? Correct Answer: Seldom The device such as a sink lavatory, toilet or shower stall is called a _____. Correct Answer: Fixture Type K copper tubing is color coded_____. Correct Answer: Green Which of the following types of load make the most significant contribution to sliding friction between two machined surfaces? Correct Answer: Adhesion 20 In broad terms, greases are compounded from internal oils and what additives? Correct Answer: Soap Greases are clarified as to their mobility and oil content by the _____. Correct Answer: SAE There are three types of load or drag that comprise sliding friction. Which of the following is inappropriate to the list? Correct Answer: 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? Correct Answer: Heat it to 250°F in hot oil Roller chain connecting pins may be held by which of the following? Correct Answer: 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? Correct Answer: Small 21 To check sheave wear to see if the belt bottom out in the _____. Correct Answer: Measure each groove angle When you find a chisel that has a mushroom head, you should _____. Correct Answer: 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 _____. Correct Answer: 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. Correct Answer: True The basin wrench is used primarily for the removal of the small nuts and piping pieces from the underside of sinks and lavatories. Correct Answer: True The best tool to use on refrigeration valves that have no handles is _____? Correct Answer: Refrigeration wrench When using a hacksaw, you should always release pressure on the backstroke to allow for the teeth to clear. Correct Answer: True 22 With direct event is obtained with keeping operating equipment and the surrounding areas cleaned and painted? Correct Answer: Save environment, pride and ecological Work equals? Correct Answer: Force times distance Which of the following is a little consequence for selecting the correct packing for a particular surface? Correct Answer: Location of the equipment to which it will be installed Throttling means is used to _____? Correct Answer: Reduced flow or pressure but still allow some flow Globe valves should be used for whatever you have the need for full flow. Correct Answer: False When stopping a centrifugal pump with no check valve, it is good engineering practice to _____? Correct Answer: Close the discharge valve first The impeller keeps the fluid _____. 23 Correct Answer: Slings the fluid to be outside Which of the following would not be the cause of a centrifugal pump failing to deliver water? Correct Answer: Slight leakage of packing The simplest pump and the least expensive is the _____. Correct Answer: Jet When starting a centrifugal pump that is part of a manifold with no check valves, _____. Correct Answer: Open the suction valve, start the pump, then open the discharge valve slowly *What is necessary in the zone coded annunciator system? Correct Answer: zone light of annunciator panel (Rob isn't sure) *Emergency power systems must supply power when local power fails to _____. Correct Answer: exit lights and stairs lights (Rob isn't sure) Which of the following alarms start the fire pumps? Correct Answer: Flow alarms 24 How much power be supplied the fire pumps in Los Angeles according to the Los Angeles Fire Department? Correct Answer: ? Fire pumps supply pressurized water to two fire suppression systems, they are_____. Correct Answer: Wet standpipe and sprinkler systems In the event of a conflict between working drawings and job specifications, the _____. Correct Answer: Architect or senior engineer would issue a binding decision When using a grinder it is perfectly acceptable to grind aluminum. Correct Answer: False On severing the length of a 2 inch pipe it is preferably to use a_____. Correct Answer: Pipe cutter Slip joint pliers or channel lock pliers as they are commonly known are an acceptable tool to use upon chrome fixtures. Correct Answer: False What type of wrench should be used to hold or turn chrome pipes? Correct Answer: Strap wrench 25 Which procedure is correct for flare joints? Correct Answer: Cut, ream, install flare nut and flare Continual problems with belt turnover are likely to be caused by_____. Correct Answer: Belt de-lip, the use of belt dressing and improper installation technique Approximately how often should lighting fixtures be cleaned? Correct Answer: Yearly Why must care be taken in keeping lubricants clean? Correct Answer: Lubricants can be contaminated in storage have to be disposed of One horsepower equals? Correct Answer: 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? Correct Answer: Centrifugal In the flow of water from the centrifugal pump should be stop by closing the discharge valve with the pump still running, the _____? Correct Answer: Pressure will increase rapidly 26 Of the following, the most is the critical factor regarding the suction lift of a pump handling water? Correct Answer: Distance *How do you change pressure from PSI to feet of water? Correct Answer: Multiply by 2.31 What can change the performance of a given pump, by changing the speed at the impeller edge, which can be done by _____? Correct Answer: 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 _____? Correct Answer: Building drain A toilet auger is a device to remove toilets from their foundations? Correct Answer: False Traps are installed to prevent _____ from entering the structure? Correct Answer: Sewer gas, offensive odors and vermin 27 The relationship of a three element grease interceptor (grease trap) is critical. The elevation of the _____ and _____ in relationship to the static water line? Correct Answer: Inlet/outlet Interceptors are designed to _____? Correct Answer: Separate hazardous material from waste Toxic waste may be _____ or _____ before being discharge into the drainage system? Correct Answer: Diluted/neutralized Removal of solids such as rock, metal or sand can be accomplished with an _____ interceptor? Correct Answer: Sediment The total drop or fall permitted in a horizontal pipe from the outlet of a trap is _____? Correct Answer: equal to the diameter of the pipe The volume of waste entering a grease trap is limited by _____? Correct Answer: flow control fitting Basic purpose of a water trap is _____? Correct Answer: Act as a water seal preventing odors and gases from entering 28 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? Correct Answer: Crown weir When ordering fitting, the letters are used to designate the _____. Correct Answer: kind of fitting Branch fittings are identified as right or left by _____? Correct Answer: Holding the inlet to you/outlet down then determine left or right. Hub and spicket pipe is identified by _____? Correct Answer: Diameter, pipe weight and pipe length Which of the following is not a trap? Correct Answer: U-trap Pipes and tubing are _____, when regarding to copper. Correct Answer: Different (tubing is measure by O.D. and pipe is measure by I.D.) When joining two length of pipe, you need _____? Correct Answer: Two pipe wrenches with jaws locked in different direction. Which type of pipe is approved by N.S.F. for potable water system? 29 Correct Answer: A.B.S. What method is used for measuring a full length of pipe? Correct Answer: End to end Which of the following is the best method used for measuring a piece of pipe with a fitting screwed on it? Correct Answer: End to center Plastic pipe has a tensile strength rated to the nearest 100 pounds? Correct Answer: True Rigid pipe is usually available in lengths of 10 or 25 feet? Correct Answer: False An 1/8 bend changes direction of a pipe _____? Correct Answer: 45 degrees The correct sequence of soldering is _____, _____, _____, _____ and _____? Correct Answer: Reaming; cleaning; fluxing; assembling; soldering What is the advantage of soft copper tubing? Correct Answer: Length available 30 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? Correct Answer: Prime kept Soldering joints are used when connecting _____, _____ and _____? Correct Answer: Refrigeration lines; domestic water line and hot water line. To reduce slippage, _____ is applied to a trap wrench? Correct Answer: Resin Brazed joints are required when copper is used for _____ and _____? Correct Answer: Fuel lines and chemical lines. When assembling a large diameter pipe, a _____ wrench may be very helpful? Correct Answer: Chain The long round pin on the electrical plug? Correct Answer: Is a safety ground At what height is another engineer required as a ladder holder? Correct Answer: Over 6 feet. 31 Filter lenses in what shade number are recommended in medium gas welding? Correct Answer: 6 *How great a variation from the recommended shade is allowable in a given welding or cutting operation? Correct Answer: 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 _____? Correct Answer: Consumable electrode The voltage produced across the arc by a motor generator DC welder is usually in the range of _____. Correct Answer: 15-45 The best way to determine whether an arc is the right length is to _____? Correct Answer: Listen to the arc In general, electrodes used for welding non farris material are of what type? Correct Answer: Reverse polarity The coating on a metallic electrode prevents formation of slag because it _____. Correct Answer: stabilizes the arc and controls oxidation. 32 Moving an electrode too slowly in a metallic arc-welding, results in _____. Correct Answer: a bead that is too high (welds) When the current setting is too high, the metallic bead will be _____. Correct Answer: too high To make a weld that is sound, the edge of the piece of the weld must be _____? Correct Answer: Cleaned As the welding current is increased, the voltage must be _____. Correct Answer: Increased The volume of waste entering a grease trap is limited by the flow control fitting. Correct Answer: 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. Correct Answer: 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. Correct Answer: True 33 Quarter bend changes the direction of flow _____. Correct Answer: 90 degrees When joining two lengths of pipe, you need to have two pipe wrenches with the jaws locked in opposite direction. Correct Answer: True The schedule 40 DWB and PVC pipe is the same as cast iron DWB. Correct Answer: True Flux should be applied immediately after _____. Correct Answer: cleaning Type M copper is color coated _____. Correct Answer: Red What's the major advantage of soft copper tubing over hard drawn copper tubing? Correct Answer: 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. Correct Answer: True 34 Solder joints are used when connecting _____, _____ and _____. Correct Answer: Refrigeration lines; domestic water; hot and cold heating lines What do you apply to strap wrenches to reduce slippage? Correct Answer: Resin What's the best term that describes water use for drinking and cooking? Correct Answer: Potable Standard grade, pitch, fall or slope in a horizontal drain system should not exceed ¼ inch per foot. Correct Answer: True The common cause of trap seal loss is _____. Correct Answer: Evaporation Water is a popular media for fire suppression for which of the following reason? Correct Answer: Readily available and low cost; cools and smothers; emulsifies and dilutes Water fire suppression systems require _____ and _____. Correct Answer: Pumps and storage tanks 35 Which of the following devices permits activation sprinklers during rainfall? Correct Answer: Rain sensor 16th bend in the direction of a pipe is _____. Correct Answer: 22 ½ degrees Pipe and tubing is measured in _____ ways. Correct Answer: Different The most important single factor in determining prolong effectiveness of oil is its _____. Correct Answer: viscosity Of the service demands of lubricating oils, which of the following is the most precise in critical requirements? Correct Answer: Turbine oil To protect the pump or motor against slight misalignment, they often are corrected by the use of a _____. Correct Answer: Flexible cuffling How important is alignment in belt driven equipment? Correct Answer: One of the most important; the most frequent cause of short belt life 36 The size of a belt is given in letters, i.e., V-belt. The V represents the _____. Correct Answer: cross sectional area The two main components of alternating current motors are the _____ and the _____. Correct Answer: Rotor; starter After a coupling is aligned, we should recheck it after two weeks to _____. Correct Answer: 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. Correct Answer: True If a coupling is not properly aligned _____ and _____. Correct Answer: 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 _____. Correct Answer: improper installation techniques If a new single sheave V-belt squeals while the motor is running, you should _____. Correct Answer: Inspect the sheave for wear. 37 Which of the following is the least likely cause of rapid wear of packing in a pump? Correct Answer: 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. Correct Answer: True What type of filter would be required when working in an area that demand filters with efficiencies of 99%? Correct Answer: HEPA filter What direct benefit is obtained from keeping operating equipment and surrounding areas clean and painted? Correct Answer: Pride and safe environment Force necessary to cause a gasket to flow into surface imperfections is known as _____. Correct Answer: C-force Which of the following is of little consequence when selecting the correct packing for particular service? Correct Answer: The location of the equipment is to be installed 38 Plug valves go from a fully open position to a fully closed position in a quarter turn of the handle. Correct Answer: True Gate valves are _____ and _____. Correct Answer: 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. Correct Answer: 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 Correct Answer: A major cause of vibration in pumps is _____ and _____. Correct Answer: Pump and motor alignment. Which of the following is the correct procedure when adjusting a gland nut on a newly packed pump? 39 Correct Answer: 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? Correct Answer: The elevation of the inlet and the elevation of the outlet in relationship to the standing water line.