Millwright Level 4 practice test review Questions with 100% Correct Answers | Verified | U, Exams of Advanced Education

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Millwright Level 4 practice test review

Questions with 100% Correct Answers |

Verified | Updated 2024

The best method of alignment to apply when shafts can not be axially secured is? cross dialing Sag corrections in dial setting are applied only to? vertical rim readings limitations in use of cross dialing methods include substantial brackets for long spans, less accuracy over short spans, and? both shafts must turn optalign plus alignment requires the transducer assembly be mounted upon the? primary equipment depending on the fluid being pumped, pumps handling slurry or abrasives need an outside supply to keep abrasives from the seal. what must be done? the outside supply should be at least 10 psi over pump pressure why is the crankcase ventilation system in an air compressor important?

maintains atmospheric pressure the two main classes of compressors are? positive displacement and dynamic if the capacity of the reciprocating compressor has to be changed, it is done best by? adjusting the clearance pocket valve The purpose of camber in a chain conveyor is to? hold chain against conveyor bottom chain blocks are designed so that the top hook is? stronger than the lower hook The foundation of a machine subject to critical alignment is poured with the concrete level at a minus elevation of? 3/4" - 1 1/2" a cyclone on a pneumatic conveyor is a? separator shock load on a bearing will result in the bearing becoming? brinelled finished grout should be kept wet for how long? 24 hours the amount of taper on a NPT thread is? 3/4" per foot

A governor is a device that will control _________ of a prime mover under varying conditions of load. speed the number of teeth per inch of a hacksaw blade for general work is? 18 teeth the Vee head of a combination set is frequently used to? lay out center lines on the end of round stock the best instrument for bisecting an angle in layout work is? dividers for lifting sharp edged objects use a? grab chain the degree of accuracy of a standard imperial micrometer is? .001" what is the first step to be completed when fitting a mandrel or journal to a newly poured babbitt bearing? relieve the edges (aka file) the load carrying section of a v-belt is situated on the neutral axis of the belt, which is? 1/3 from the top of the belt to measure vacuum on a fan inlet a ____________ is used?

pipe tube manometer a gear having a pitch circle as a straight line is known as a? rack gear what causes a air clutch to engage slowly? insufficient air volume gears that connect an intersecting shaft and have an equal number of teeth on each gear are called? mitre gears a spherical roller bearing is capable of? sustaining high radial loads the critical point of a rolling element bearing refers to? the bearing speed hydraulic pumps are rotary devices used for converting? mechanical energy into hydraulic energy to minimize the friction of the fluid in tubing, the bends should be? 2 1/2 to 3 times the tube diameter the absolute rating of the filter element refers to the elements ______________ hole size. largest

when two identical fluid motors are connected in parallel with each other, they will develop? half the speed and twice the torque fluid passing through a restrictor is subject to which law? bernoulli regeneration can only be achieved on? advance stroke to increase the volumetric output of a fixed displacement pump, you would? speed up the prime mover the type of pressure controls valves that require external drains are? sequence and pressure reducing valve a line used to denote unexposed detail on a blue print is called? hidden line what is the effect in a system when a hydraulic accumulator stops flow? flow rate decreases chain conveyors that are used in wet, corrosive, and heavy duty applications, usually use chain made from? manganese steel

a heavily loaded drive has to be repeatedly started. Motor overload can be reduced by using? a centrifugal coupling some machine base bolts are located within a piece of pipe before anchoring into the concrete base, this is to? allow for any slight misalignment the part which is most subjected to wear in a flexible steel element coupling is the? spring or the grid the recommended usable range of a torque wrench is between? 25%-75% when a heavy load is transmitted between a shaft and pulley, use a? gib head taper key the most common place for wear in gear pumps is? on the end plates the maximum force output of s hydraulic cylinder is determined by? effective area and system pressure the position of the principle pressure relief valve in a hydraulic system is usually?

between the pump and the first directional control valve the most suitable position for an air bleed valve in a hydraulic system would be? at the highest point in the system pascals law deals with fluids that? have no motion bernoullis law deal with fluids that are? moving if there is no pressure in a hydraulic system, the fault is? broken spring in relief valve flux should be left on the weld deposit during cooling to? slow cooling and protect hot metal from the air when arc welding and the heat concentrated in the electrode, the welding machine is set up in? reverse polarity the most common cause of wear in a chain coupling is? misalignment a compression coupling is a? rigid coupling you notice that a heat exchanger has an external leak, the main cause of this is?

cap seal failed fatigue failure of a bearing starts as? flaking in a fixed and floating two bearing mounting, what load is the fixed bearing intended to carry? thrust the length of a tapped hole should never exceed? 1 1/2 times the diameter of the screw flat surfaces should be checked with a straight edge in how many directions? 6 which pressure energy is measured only against surfaces that the air actually strikes? velocity a gradual converging cross sectional area in ductwork will cause an increase in which property of a air mass? Velocity what is the disadvantage of a direct acting relief valve over a pilot operated relief valve? cracking pressure unreliable pilot operated relief valves have a orifice in the spool. what is the purpose of this?

to allow oil pressure above the spool to balance it increasing the pressure setting of a hydraulic motor results in? more torque thermal overload protection on a hydraulic system is provided by fitting which of the listed devices to the reservoir? temperature switch the metal not used in babbitt is? zinc what material is often used for tinning bronze shells? lead concrete is considered to have reached desired working strength in? 7 days to strengthen steel you would add? moly normalizing of steel is used to? relieve stress which material sparks the least when doing a spark test? low carbon steel

after making a cut on a shaft mounted in a lathe, a taper is measured from end to end. The most likely cause of this will be? offset tailstock what happens when a fluid coupling stalls under load? runner/turbine and impeller stops the purpose of a tie rod on a shaft mounted reducer is to? adjust belt tension a thrust bearing on a screw conveyor is installed? on the tension end most erosion on turbine blades would be found where? on the low pressure, low load end axial clearance is ________ on a steam turbine. preset a meter out flow control valve is used to regulate fluid flow from which device? actuator a pressure reducing valve is set at 500psi, when the cylinder reaches the end of its stroke the pressure at the valve outlet will? remain the same

which valve allows for slow descent of the cylinder? counterbalance valve the type of grinding wheel used to sharpen a carbide drill would be? a silicon-carbide wheel what play must be eliminated before doing laser alignment? torsional flexibility on a centrifugal pump installation, the foot valves purpose is to? retain liquid in the line so that the pump is primed if a pump shaft begins to wobble after operation for a period of time, the cause is? both bearings are fixed what is the browinsh spot found on spool valves? varnish what is required when installing a taper bore bearing against a shoulder? withdrawal sleeve what type of unbalance requires the use of a computer? dynamic

what is the safest way to weld on a cylinder that has combustible material in it prior to welding? fill it with steam when flaring a tube what is the minimum distance the flare should be from the bend? 2 nut lengths what kind of jack would be used to hold a load permanently? screw jack what is the prime factor when installing a large condensate return tank? proper alignment of piping on a large induced draft fan, which bearing would show wear first? the inboard bearing which type of hydraulic motor requires the use of mechanical devices to prevent internal leakage during start up? vane what measures should be carried out when moving a heavy weight down a incline? attach a safety line or restraint what is used to check the crosshead shoe clearance on a reciprocating compressor?

feeler gauge what is usually done to help accommodate axial expansion on large steam turbines mount it on dovetail guides after a long period of not operating what is the cause of bearing failure in a standby condensate return pump? false brinelling large diameter pipe over 12" is sized by? its outside diameter and wall thickness to decrease the hardness and increase the toughness of steel is called? tempering the purpose of the fillet on the turned down shaft shown below is for? relieving stress the type of machine coupling used on shafts with no cut keyways is a? flanged compression type slip rings can be found in what type of clutches? electrical the purpose of a torque converter is to?

multiply torque as it slows down if an electric motor driving a compressor suddenly shows a very low amp draw, what is the problem? inlet throttled friction bearings are designed to carry what kind of loads? radial loads a magnetic type bearing is classed as a? separable bearing the type of meter used to check current in an electrical circuit, would be a? ammeter an ohmmeter is used to check a? open circuit two shafts are operating in parallel, the gears being used would be? herringbone gears a continuity tester cannot be used on a live electrical circuit because? it has its own power supply the most common type of electric motor is a? squirrel cage rotor

a forced draft fan is used in steam generating plants to? blow air into the firebox an induced draft fan is used in steam generating plants to? maintain a pressure slightly lower than atmospheric pressure in the firebox a stuffing box on a steam turbine is located where? on both sides of the wheel barring gears are used on a steam turbine to? keep shaft rotating until it cools down steam nozzles are shaped to convert? pressure energy into kinetic energy where would you install a pressure line filter? at the pump outlet cylinder creep in a hydraulic circuit is caused by? fluid leakage in the directional control valve to minimize air leaks in the stuffing box, you would? install a lantern ring a cup style seal is used on a? reciprocating pump the main purpose of a wear ring in a centrifugal pump is to?

seal inlet from outlet a diffuser is used on a centrifugal pump to? balance radial loads to prevent pulsating loads in a piston compressor, you would install a? accumulator on the discharge side the type of blower or compressor that produces axial flow is? a screw compressor what do you use to repair a hole in a conveyor belt? double plate fasteners what tool would be best for laying out the center of a piece of round stock? center head ductility refers to the ability of a metal to be? shaped by extrusion annealing refers to a metal being? stress relieved metal alloyed to produce good wear factors is called? A.R. to check clearance in a diesel engine main bearing, the best method is to use?

lift check what sparks the least when cutting with a torch? mild steel a general rule of thumb for the installation of a separable bearing is? both rings have a press fit a general rule of thumb for the installation of a non-seperable bearing is? the rotating ring has a press fit and the non rotating ring a push fit what does the dash # in hydraulic hoses mean? inside diameter in 1/16" a JIC THREAD angle is? 60 degrees what type of hydraulic pump uses a crescent? internal gear when lining up a vice on a milling machine the dial indicator should be placed on the? quill or column if high pressure exists in the first stage of a two stage compressor, the problem could be?

a leak in the intake valve on the high pressure side when installing a vacuum gauge on a metering pump, it should be located where? on the inlet side vanes are held out by what, in a vane motor? springs when using a transducer you are converting? a mechanical vibration into a electrical signal which medium will cool metal the slowest? sand a reef knot is used to? tie two ropes of the same diameter together the taper per foot on a taper pin is? 1/4" per foot the worst type of groove for a journal bearing would be? a sharp vee the purpose of springs on a mechanical seal is to? maintain tension on seal faces and prevent axial movement before replacing a mechanical seal you should? mark the position of the seal on the shaft before removing it.

if the swash plate on a pressure compensated pump is centered, the result would be? no flow the proper sizing of a centrifugal pump would be the? outlet, inlet, and impellor diameter the purpose of using zinc based paint as a primer is because? it controls rust due to moisture what type of blower is required for high pressure air systems? a positive displacement the chemical process in an air dryer in which the desiccant mixes with the water is called? absorption which ring on a conrad bearing is required to have an interference fit? rotating ring if an air compressor can not keep up with a systems demand, the reason would be? the intake air is too hot a portable electric drill sparks excessively on start up, what must be done to correct this? change the brushes

what tool is used to scribe a line following a straight edge? hermaphrodite calipers the correct procedure for completing a root pass on a vertical Multipass weld using 6010 electrodes is? whip using short arc length what should you do if you are experiencing excessive arc blow when welding? reposition the ground clamp how do you reduce the magnetizing effect when welding? wrap the ground cable around the work which process would be the best to minimize distortion when joining two thin pieces of metal together? soldering what determines the welding helmet shade darkness number? the current level too much pressure in a pneumatic system will cause? more pressure on the actuators what can you do to reduce the diametral clearance in a taper roller bearing? install a speedy sleeve between the bearing and shaft

what type of valve would be used to prevent a hydraulic motor from over running? brake valve amplitude in vibration refers to? the distance of movement if a high level of moisture is detected in air lines, valves and actuators, throughout a pneumatic system you should check what? air dryer fluid couplings should never be filled more than ________% of their total capacity 80% a crane should keep a minimum distance of _______ feet away from any power line 15 how do you know when no clearance is specified on a "K" style mounted ball bearing that you have the proper clearance? a slight drag can be felt on the outer ring what determines the flare size on tubing or pipe? slightly wider than the sleeve

a pilot operated relief valve has a plugged spool drain passage. how will this affect the valve operation? will not open at any pressure a pilot operated relief valve has a plugged sensing orifice in the spool. what effect will this have on the valve operation? opens at very low pressure continuous dirt build up is observed on a bearing lip seal. what solution should be implemented? replace the seal with a double lip design when fitting a manometer to measure the pressure in a vacuum system it must be connected? on the inlet side of the pump/blower what is the best method to plot and record the vibration characteristic of a bearing? vibration spectrum graph what steel can be identified when grinding, that produces a long spark stream that is white in colour? machine steel what color is a cold chisel after it has been tempered? dark blue/purple a double acting cylinder used in a vacuum system has a leaking rod seal. what performance effect will this have?

reduced extension speed what gauge would be used to check vacuum pressure? absolute pressure gauge what are you checking for when using a halide torch? refrigerant what type of sensor is used in generally all band vibration data collection? piezo-electric to perform minor adjustments (calibrate) on a micrometer a "standard" is used. which part is adjusted to correct reading errors? the sleeve from what material are drill bits and reamers commonly manufactured? high speed steel when putting a thread on a steel shaft in a lathe, the tool used to check the thread angle is a? thread centre guage to square the table on a milling machine, requires installing the indicator where? mounted on the column, with the dial pointer on the table

what must be considered when gang milling on a horizontal milling machine? thrust loading when drilling a piece of brass what should you do to the drill bit? flatten bit edges what non-destructive testing method is used to find deep sub- surface defects in steel? ultrasonic which non-destructive testing method would indicate porosity and flaws or defects that are open to the surface. liquid dye penetrant what is the best way to balance flow in a reciprocating pump? increase the inlet pressure what would the effect of material build up on the blades of a blower fan? the motor would draw more current what is the comparison of the swl of a choker hitch to that of a vertical hitch? the swl will be 75% of a vertical hitch what is the purpose of grout in a machine installation? to evenly distribute the weight of the machine

if you have a lip seal going over a keyway, the best way to install the seal would be? cover the shaft with shim stock lobe compressors produce high volume at low pressure. the requirement of airstream or surface lubrication is? is not required, no metal contact as a reciprocating compressor is acting on the compression stroke the? inlet valve is closed and the discharge is open the use of a valve that has infinite positioning ability to control the delivery of a screw compressor to the system is known as? modulation control how do you identify the difference between a liquid ring vacuum pump and a compressor? vacuum pressure is less than atmospheric what device is used on a reciprocating compressor to reduce the delivery in smaller increments than by unseating the suction valves? clearance pockets the twin tower type dryer operates on the physical process known as?