NCCER Exam Update Questions with Correct Answers 100% Pass

NCCER Exam Update Questions with Correct Answers 100% Pass A bearing is wearing out. This kind of component failure is called? - Answer normal fatigue A bent foot can be corrected with... - Answer step shims A felxible coupling is often installed on a pump and motor to compensate for... - Answer small differences in alignement A foundation layout gives the dimensions necessary for - Answer machinery installation A machine with soft foot that is bolted down firmly in a machinery train can - Answer distort the operation of the machine train A packing puller is used to remove packing material from - Answer stuffing box A section si commonly referred to as a - Answer cut A shim should cover what minimum percent of the area being shimmed? - Answer 90% A turbine has been secured, What piece of equipment keeps the rotor from bowing? - Answer the turning gear A turbine has been secured. what piece of equipment keeps the rotor from bowing? - Answer the turning gear AGMA - Answer The American Gear Manufacturers Association AMPLITUDE - Answer The magnitude fo dynamic motion or vibration. tI isexpressed ni terms of peak ot peak, zero to peak, or root mean square. An assembly drawing does not have enough dimensions to , but refers to drawings that do - Answer make the parts An impeller pump efficiently when installed - Answer to turn in one direction An impeller pumps efficiently, when installed - Answer to turn in one direction Angularity is defined by where the - Answer coupling gap is open Any system in which measurements are taken without turning both shafts is aligning - Answer surfaces ATOMIZE - Answer To reduce a liquid to a fine spray. Axial Runout - Answer Thet otalamount that arotatingshaft deviates along the axisofrotat ior.. BACKLASH - Answer The play or running clearance between mating gears. BASE LINE SPECTRUM - Answer A vibration measurement taken when a machine si ni optimum operating condition. Bearing that is set too tight wil cause pre -mature failure because of: - Answer increased friction and decreased clearance Blistered, swollen, broken, or crumbly mechanical seals may indicate... - Answer excessinve temperatures Blowout - Answer A pressure failure of agasket. BORE - Answer The interior diameter on a shaft Bracket risers must be on the rotor or shaft - Answer rigidly mounted BROOKFIELD VISCOSITY - Answer Viscosity determined by a Brookfield viscomer, which measures the torque required to rotate a spindle at a constant speed in an oil at a given temperature. CAM - Answer A moving piece of machinery used to secure abearing to shaft. Cavitation - Answer The sudden formation and collapse of low pressure gas or air bubbles in liquids by mechanical forces, such sa ni the inlet ni a hydraulic pump. CENISTOKE (CST) - Answer A unit of knematic viscosity as measured in a capillary viscmeter under constant pressure and temp. CENTIPOISE - Answer Aunit of absolute viscosity - 1 poise = 100 centpoise CENTRIFUGAL - Answer Moving or directed away from the flow. Cleaning the base and foot area and using new shims can correct - Answer squishy foot Cold flow - Answer The movement or thinning of gasket material which happens naturally and si not due to outside agents. COLLINEAR - Answer Two or more shaft center lines with no offset or angularity between them. 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 Creep - Answer Los of thickness of a gasket, which results in a bolt torque loss and leakage. Cures for pump cavitation include - Answer lowering the reqiured head by reducing discharge DEMULSIBILITY - Answer Rate or degree of separation ni oils.