Prepare for the NCCER Millwright certification exam with these practice questions and answers. This guide covers machinery installation, precision alignment, bearings, lubrication, and preventive maintenance.
Q: unusual
Answer: If the seal was not properly aligned or there is excessive wear in some bearing or shaft,_______ wear tracks will be the indicator
Q: sharpened brass putty knife
Answer: For removing hard to remove gasket materials found on sealing surfaces, ______ is recommended
Q: Conducted on the job
Answer: Apprenticeship training is_______
Q: distance
Answer: Charting alignment on a graph requires a chart that is divided into thousandths of an inch vertically for the indicator readings and into whole inches horizontally for the__________
Q: hidden
Answer: The orthographic drawing may contain a dashed or _______ line
Q: Radiation
Answer: In order to shoot through a test object and project an image onto a detector or a sheet of film, radiography uses a source of penetrating called _______
Q: *scribe circles*transfer measurements*compare distances<measure angles
Answer: Which of the following task would you not perform with dividers?
Q: 10%
Answer: The over speed trip device is actuated when the turbine reaches a predetermined limit usually _________% above normal full-load speed
Q: high
Answer: Positive results in an offset measurement mean that the MTBM is _____ or on the 3-o’clock side.
Q: offset misalignment
Answer: The coupling gap is set, and then the ______ is measured
Q: pressure
Answer: In a hydraulic system, movement depends on_____
Q: furniture or utility items
Answer: Fractional dimensions are used on objects such as _______ or ______
Q: elimination
Answer: If the cause of the problem is not immediately understood, the process of________is often the procedure of choice
Q: 3/16
Answer: When applying sealant to the sealing gland flanges, keep the sealant away from the inside edges of the flange by at least_______ inch
Q: Transducer
Answer: A stroboscope is triggered by a_______
Q: thread
Answer: The pitch of threaded fasteners is measured with a ________gauge
Q: Surface cracks
Answer: Liquid penetrant highlights flaws and reveals________
Q: die
Answer: A tool used to cut external threats on s bolt or rod is called a ______
Q: special processes
Answer: A bill of materials may include info on _______ and other reference information
Q: surface speed
Answer: Engaged gears always have the same _____
Q: general arrangement
Answer: Elevation of equipment is usually found in the_____
Q: Vibrations
Answer: Inspect the pulleys, rollers, and idlers for unevenness or______
Q: 15-20 degree angle
Answer: When cutting thin steel with Oxyfuel fuel cutting equipment, hold the torch so that the tip is pointing in the direction the torch is traveling at a _____ angle
Q: Grease………
Answer: Labby seals work BEST with materials such as_____
Q: Friction
Answer: Lubrication is the application of any substance that reduces________
Q: Driver coupling jig
Answer: When the dial indicator is mounted on the complex reverse driven coupling jig , the indicator is registered on the____
Q: In racks
Answer: Pipe should be stored_____
Q: Single deep groove radial
Answer: The most common type of ball bearing is a _____ bearing
Q: split
Answer: Couplings that are installed after the driver and driven shafts have been aligned and the equipment has been fastened into position are ________ couplings
Q: Factors
Answer: When two or more numbers are multiplied to make another number thy ate called _______of the third number
Q: clockwise
Answer: The continuous-reading dial indicator starts at zero and increases _________
Q: Electronic filters
Answer: Vibration within a specific narrow band range can be detected by _______
Q: Teflon
Answer: What type of o ring do you use with temperatures between-300 and 500?
Q: Rivet cutting
Answer: The special cutting til for cutting off bolt heads and nuts is called a ______ tip
Q: pressure
Answer: PCVs limit and regulate _______in the system
Q: Displacement
Answer: The total distance the shaft travels from one peak to the other during one vibration cycle is the ______
Q: Cup
Answer: A positive-contact seal, generally used on cylinder pistons is the ______seal
Q: Brass plugs
Answer: Equipment reference points are marked with_____
Q: marring
Answer: On a hydraulic press, use a piece of material softer than the work piece to keep from________ the work piece
Q: Exact bottom
Answer: When setting up an angle iron jig, one indicator should be on the exact top of the MTBM, and the other indicator should be positioned at the ______ of the driven shaft
Q: A broken cam
Answer: A pillow block barring failure that is caused by an undersized shaft is _______
Q: Excessive leakage
Answer: The most common symptom of packing failure is ________
Q: filter
Answer: The abbreviation FLT on a hydraulic drawing means _____
Q: Lifting rough castings
Answer: Chain slings are normally used for_________
Q: Angle Dimensions
Answer: Curved lines with arrowheads touching the extension lines are _________
Q: Replacing damaged rollers
Answer: Maintaining and repairing roller conveyors consists mainly of ________
Q: Indicator sag
Answer: When fabricating a jig, the millwright should minimize __________
Q: Airfoil
Answer: Air flows through the wheel with less turbulence in a __________ centrifugal fan
Q: Blades of a cooling fan
Answer: Excessive build up of dirt on the ________ used with an after cooler will create vibrations
Q: Interlocking braid
Answer: The type of packing in which each strand passes through the body of the packing at an angle of approximately 45 degrees is ________
Q: go around it
Answer: To obtain an object from the opposite side if the conveyor, you must___
Q: First starts
Answer: Boundary lubrication usually occurs when a machine______
Q: welded
Answer: Some chain links are easily removed and replaced; others have to be cut out and ______ back into place
Q: A different direction
Answer: Each view of an orthographic projection show the shape of an object from________
Q: reservior
Answer: When tracing a system, begin at the _______
Q: Equipment center line
Answer: Anchor bolts must be aligned to the______
Q: You can feel a roughness as you rotate the shaft
Answer: If there are flat places in motor barrings, _________
Q: Shaft with the rotation shown
Answer: This symbol shows a______
Q: Rope or braided style packing in a stuffing box
Answer: A traditional shaft seal consisted of_____
Q: Class C02
Answer: The type of fire extinguisher to keep in a lubricant store room is a _____fire extinguisher
Q: Outside micrometer
Answer: The head of a telescoping gauge is measured using a ______
Q: 10
Answer: The correct mechanical squeeze for an oring is usually equal to _______ percent of the oring
Q: A finished appearance is required
Answer: Cap screws are used when______
Q: High-speed; Low-load
Answer: Elliptical bearings are used in _______ situations
Q: Actuator
Answer: The device that performs the work in a pneumatic system is a ____
Q: Faster | more
Answer: The hotter a gas is,the ________the molecules in the gas move, and the_____ energy is present
Q: The midpoint
Answer: When setting up dial indicators, the contact point pressure should be enough so that the stem is at _______ of its travel range
Q: Compression
Answer: Taler-bored flange couplings are also known as ______ couplings
Q: Plastic
Answer: The type of shim material that is used to support light weights and where the shims required are very thin is_______
Q: Metal to metal contact
Answer: When listening for unusual motor noises, you should be listening for________
Q: Prisms
Answer: The length of the distance to be measured determines the number of______ to be used
Q: Distort the operation of the machine train
Answer: A machine with a soft foot that is bolted down firmly in a machinery train can____
Q: Gear
Answer: The coupling that has two halves with external teeth and a sleeve with internal teeth is the _____ coupling
Q: Try to get along with the foremen, work hard, and follow instructions
Answer: Some foremen will be disagreeable and hard to get along with. As an apprentice, the best way to deal with this is to______
Q: Shimming
Answer: Lateral alignment can change very easily during____
Q: 10,000
Answer: A mechanical tachometer is used kn machinery that rotates less than_____ RPM
Q: Transmit stains
Answer: Under misaligned conditions, couplings can ______ the shaft ends
Q: 1,0000 degrees F
Answer: Fiberglass packing material works well in temperatures up to _____
Q: Move your head slightly
Answer: To check an instrument for parallax,______while looking at the crosshairs
Q: 1/4
Answer: The rubber lined pump is characteristically used with slurries that have particles less than_______ of an inch in diameter
Q: Engineer’s Scale
Answer: A special scale that is divided into 10,20,30,40,50 or 60 parts is an_______
Q: Ear muff type hearing protection
Answer: The most effective hearing protection is provided by _______
Q: External
Answer: The type of gear pump that uses two identical gears meshed together is the _______ gear pump
Q: Petroleum oil-based
Answer: Most hydraulic fluids are______
Q: desiccant
Answer: The two types of chemical dryers used in compressed air systems are the deliquescent dryer and the _______ dryer
Q: Worn piston rings
Answer: If the discharged air of a reciprocating compressor is below its rated capacity, a possible cause may be ___________
Q: Bearing Puller
Answer: The most common way to remove bearings is to use a ________
Q: laminated
Answer: The type if packing that consist of layers of packing material between layers of rubber is _______
Q: Replace damaged threads in a bolt hole
Answer: A heli-cool is used to_____
Q: 5/8
Answer: In the standard proportion for chain manufacturing, the chain width is approximately ______ of the chain pitch
Q: The actual size if the drawing
Answer: No matter the scale of the drawing, the dimensions are always _______
Q: Label hazardous material containers
Answer: Employers who use hazardous materials are required to_____
Q: Tabs
Answer: Some pre cut shims are made with ______ for easy installation and removal
Q: Constant and scalar
Answer: The accuracy of a total station is stated in terms of ______instrument error
Q: Mediums
Answer: The materials used in strainers and filters to remove particles from hydraulic fluid are called ______
Q: Establish and enforce standards to ensure a safe work place
Answer: The primary function of OSHA is to_______
Q: Foward-curved
Answer: The type of centerfugial fan that is suitable for equipment with long shafts is the _______ type
Q: Flow rate
Answer: The speed at which an actuator moves depends on the ________
Q: Center at the center of
Answer: The _______ bearing has an outter race that is a section of a sphere with its center at the center of its bearing race
Q: Immediately after stopping
Answer: To check for thermal growth alignment problems, the equipment must be checked _______
Q: Radius gauges
Answer: To measure internal and external rounded corners, _______ and used
Q: Suspension
Answer: Detergents and dispersants work by absorbing the insoluble particles and maintaining them in ______
Q: Half the cost to replace the pump
Answer: A rule of thumb on deciding to repair or replace a pump is , if the repair cost more than_________ then replace it.
Q: Periodically inspect and maintenance
Answer: In PM plant assets and equipment are subject to_______
Q: Mounting platform
Answer: The _____ should be clean and level with no signs of corrosion, wear, or cracks in the metal frame
Q: Power transmission
Answer: Shafts that are not coaxial use belts and chains for_____
Q: Hold hears and pulleys on shafts
Answer: Taper and spring pins are often used to_______
Q: Rim & Face
Answer: Conventional alignment is also called?
Q: A clean rag
Answer: When disassembling pneumatic components, cover them with_____ if they are left out for a while
Q: After the receiver
Answer: A pressure regulating value is normally a valve open ______
Q: Set in place
Answer: Pre-alignment is the preliminary alignment of equipment that is performed when the equipment is originally______
Q: 250 degrees
Answer: Bearing temperature during insulation shouldnt ever exceed what temperature?
Q: Store fluid under pressure until the system needs it
Answer: Accumulators are designed too_______
Q: Make the parts
Answer: An assembly drawing does not have enough dimensions to _______, but refers to drawings that dukes
Q: Monitoring
Answer: Checking vibration regularly and entering the vibration readings on a data sheet or a computer is known as vibration ______
Q: Install couplings on the mating shafts
Answer: The first step in setting a STAT (stationary) OR MTBM ( motor to be moved) is to _____
Q: AA
Answer: The smallest size of pre-cut shims is_____
Q: Falk
Answer: A grid coupling is also called a ____coupling
Q: Uneven tightening of the end shield plate
Answer: Bearings getting out of alignment may be caused by______
Q: Broach
Answer: A tool used to cut keyways is a ____
Q: Humidity or dust
Answer: Imperfect performance by a laser in the atmosphere is caused by____
Q: Plumb the suction
Answer: When the STAT is centered, the base is shimmed to____
Q: Stationary
Answer: What does STAT stand for?
Q: Motor to be moved
Answer: What does MTBM stand for?
Q: Header pipe
Answer: The steam chest is a ____
Q: Vane axial fan
Answer: The type of axial flow fan that discharges air in a straight line is a_______ fan
Q: Shaft
Answer: Belt conveyor rollers are cylinders with a ____ the the center of each cylinder
Q: 227
Answer: The most common sized oxygen cylinder used for welding and cutting operations holds ____ cubic feet of oxygen
Q: Positive contact
Answer: The seals used where the seal area is continuously flooded are _____ seals
Q: Open-type
Answer: The radial fan wheel that is used for general purpose duties is the_____ wheel
Q: Inward axial thrust
Answer: Bevel gears have no____
Q: Not as susceptible to distortion at high speeds
Answer: One advantage using multiple-spring seals is that they are _____
Q: Fast wind handle
Answer: The part of the ratchet lever hoist that is used to let out the chain without using the ratchet handle is the_____
Q: Roller
Answer: The conveyor that may be either powered or unpowered is the_____ conveyor
Q: False brinelling
Answer: The bearing defect that is caused by vibration between the rollers showing marks on the races at the same intervals as the elements in the bearing raceway is______
Q: 5
Answer: The square root of 25 is____