NCCER MILLWRIGHT QUESTIONS WITH 100 % CORRECT ANSWERS | VERIFIED

NCCER MILLWRIGHT What happens to a typical belt conveyor when tracking is changed? - Answer-The belt moves from side to side What types of lines are used with dimension lines? - Answer-Extension lines What is the maximum pressure rise for a fan? - Answer-2psig How is an impeller held on a shaft? - Answer-With threads or nuts What is a Babbitt most commonly made of? - Answer-Tin and lead What is the standard material used for pre cut shims? - Answer-Stainless steel What type of drawing details inside dimension structural column locations and mounting? - Answer-Foundation layout What are the two types of blades used in steam turbines? - Answer-Impulse and reaction blades Which radial fan blower is considered general purpose? - Answer-Open type What does a multi stage reciprocating compressor provide? - Answer-Higher pressure Bearing that is set too tight will cause premature failure because of - Answer-Increased friction and decreased clearance Motors with open bearings should be thoroughly cleaned every - Answer-Year Most vertical pumps are driven by - Answer-Electric motors To measure shoulder relief on a shaft, use a - Answer-Radius gauge A flexible coupling is often installed on a pump and a motor to compensate for - AnswerSmall differences in alignment Machine frame distortion caused by tightening or loosening bolts of a single foot is called - Answer-Soft foot What is gasket creep? - Answer-Loss of thickness A turbine has been secured. What piece of equipment keeps the rotor from bowing? - Answer-The turning gearAn impeller pumps efficiently when installed to - Answer-Turn in one direction Which of the following is not allowed on any job site? - Answer-A metal hard hat Cure for pump cavitations include - Answer-Lowering the required head by reducing discharge When transferring elevations, which tool is most precise? - Answer-Optical level Which shade of tinted lens should be used when oxy-fuel cutting and welding? - Answer-4-6 What is used to highlight wear pattern in gear teeth? - Answer-Bluing The first step prior to pre-aligning a motor horizontally - Answer-Inspect base plate What 3 dimensions should be taken to fabricate a new flange gasket? - AnswerDiameter of pipe opening, outside diameter of flange, diameter of bolt circle On assembly, what is used to identify sub assemblies? - Answer-Circles Why are colored threads woven into synthetic web slings? - Answer-To indicate damage and/or wear What is the pressure rise for a blower? - Answer-2-10 psig A packing puller is used to remove packing material from - Answer-A stuffing box What is the most common cause of repeatability? - Answer-Soft foot The best way to fabricate a new flange gasket is to - Answer-Use the old gasket as a template Which of the following is the most common cause of wear on only one edge of a v belt? - Answer-Sheave groove misalignment Power is transmitted from one shaft to another adjacent parallel shaft with - AnswerBelts and chains Which set of tools should be used to align a motor to a pump? - Answer-Dial indicator, straight edge The position of the lantern ring should be carefully noted when which of the following is removed? - Answer-Shaft packingReciprocating compressors are - Answer-Positive displacement The job calls for rigid couplings to be used. The alignment between driver and driven shafts must be - Answer-Precise Radial bearings are mounted on the impeller shaft to prevent - Answer-Perpendicular movement of the shaft when the pump is running Too great of a compression ration may cause excessive - Answer-Discharge temperature Screw conveyors are normally enclosed in - Answer-Tubes What is purpose of lock out/tag out? - Answer-To prevent operation Tension on the conveyor belts and chains is maintained by - Answer-Take ups The first step to installing a base plate is to establish - Answer-Location A shim should cover what minimum percent of the area being shimmed? - Answer-90% A bearing is wearing out. This kind of component failure is called - Answer-Normal fatigue A device used to remove a broken tap is called - Answer-Extractor What is the standard fastener used in heavy machinery construction? - AnswerThreaded bolt Which of the following is a high pressure pump? - Answer-Diaphragm metering Why should workers not touch a clean bearing journal surface on a fan shaft with their hands? - Answer-Perspiration can cause discoloration and pulling When placed in a vice, how should a polished shaft be protected from pressure marks and scratches? - Answer-Use soft jaws Typically the last step after the baseplate has been field verified is - Answer-Grouting Tension on a belt conveyor is adjusted with the take up on each side of the - AnswerTail roller What should be attached to a 1" thick steel beam to to make a bolt hole? - Answer-Mag based drillThe packing gland on rotating equipment should be adjusted to - Answer-Allow slight leakage Blistered, swollen, broken, or crumbly mechanical seals may indicate - AnswerExcessive temperatures What organization develops the standard for grade working of fasteners? - AnswerASME What is the best way to install bearings on a shaft? - Answer-With a press that contacts only the inner face of the bearing During installation, what is the maximum temperature to which a bearing should be brought? - Answer-250° F What is the maximum pressure allowed on an acetylene regulator? - Answer-15psig Shaft is equipped with mechanical seals and the runout is to be checked. And indicator reading .004 in part is - Answer-Bent and probably needs to be replaced How should a dial indicator be used to check a pump shaft for end play? - AnswerGently pull the shaft out and look for evidence of axial movement Pump and motor are to be aligned using the reverse indicator method. The procedure requires one dial indicator to be set on the - Answer-Rim of the pump coupling, and the other to be set on the rim of the motor coupling ____________ of the same width are to be aligned, alignment normally starts from the - Answer-Pulleys; outer face of the stationary pulley to the outer face of the adjustable pulley Coupling on a pump and motor are 7.023 inches apart. Which of the following items will be needed to connect the coupling? - Answer-Spacer Which component of a combination square should be used to measure angles? - Answer-Protractor head Which of the following materials is bonded by resin and used as shim stock? - AnswerLaminated brass A bent foot can be corrected with - Answer-Step shims To check a motor for binding or tough spots, - Answer-Turn the rotor by handDouble suction centrifugal pumps can - Answer-Pump a large volume of fluid What is the approximate percentage of lag that is desired between shaft centers of chain drives? - Answer-2% Misalignment on equipment components is most likely a combination of - AnswerAngularity and offset The first step to establish location of equipment anchor bolts is to - Answer-Determine centerlines The most common types of gearboxes are parallel inline shaft mounted and - AnswerRight angle Turbine being inspected has 2 gears of the same size that are connected by a single idler gear. How will these 2 gears go? - Answer-In the same direction at the same speed What specialty tool can be used to check the oil clearance on a bearing without damaging the surfaces? - Answer-Plastic gauge How should a coupling with an interface fit be installed? - Answer-Heat the coupling to make it expand Shims adjustment should be verified using a - Answer-Dial indicator Which of the following is not a benefit when choosing a labyrinth? - Answer-It has low initial cost Which of the following blades are stationary in a compressor? - Answer-Stator On a 0-1 micrometer, how much is one full rotation of the stem? - Answer-.025 In a conventional alignment, indicator sag is the - Answer-Amount the indicator falls away on the bottom