NCCER MILLWRIGHT PRACTICE EXAM 2 LATEST 2023 WITH COMPLETE SOLUTION

NCCER MILLWRIGHT PRACTICE EXAM 2 LATEST 2023 WITH COMPLETE SOLUTION @STUVATE- STUVIA On a pedestal grinder, the gap between the grinding wheel and work rest should not exceed: - 1/8 inch The kind of abrasive material used in grinding wheels for general purpose applications is: - aluminum oxide A blotter is used on a grinding wheel to: - protect the flanges from the abrasize grit, display information about the wheel and compensate for the uneven surfaces on the wheel Flanges should at least be: - 1/3 the diameter of the wheel The best wheel to use for cleaning scale and dirt off a workpiece is the: - wire wheel What is a natural abrasive? - made of natural material rather than synthetic Under properties of abrasives, to what does the term hardness refer? - ability of a material to scratch or penetrate another material The ____ is the part of the wheel that holds the grains together - bond Markings for the wheel identification can be found on the _______ - Blotter What is the recommended speed to run a grinding wheel? - Never run it faster that the max RPM of the grinding wheel How should you start a grinder? - Stand off to the side and wait a full minute Is 46 or 60 the coarser grit? - 46 What are the 2 most commonly used abrasive materials? - Aluminum oxide and silicone carbide For what purpose is the diamond dresser used? - When a very fine finish is required What is the purpose of ring test? - to check for cracks If a grinding wheel makes a ringing sound what does that mean? - wheel is not cracked What is the purpose of truing a grinding wheel? - Restores the shape of the wheel and makes the outer surface of the wheel concentric with its bore An out of balance wheel: - vibrates Belt grinders are useful for: - quickly deburring and chamfering a workpiece What is the purpose of a GFCI? - Senses drop in current and switches power off The kind of abrasive material use in grinding wheels for general purpose application is: - aluminum oxide Is it safe to carry a portable grinder by the power cord? - False Is it safe to use standard sockets with electric impact wrenches - False The larger the power drill, the slower the RPMs and the higher the torque - True Can you use conventional drill bits with a hammer drill? Why or why not? - Yes of the hammer drill has a switch to turn off hammer action Most cordless drills have torque control - True Prolonged use of power or air tools can cause carpal tunnel sydrome - True Is it safe to run an impact wrench with a universal joint and socket attached - No because it may throw off attachments What conditions would you use a GFCI - Wet conditions What 3 things does a GFCI protect: - 1. Overload 2. Overcurrent 3. Ground fault protection A GFCI prevents all electrical shocks - False Higher voltage on a battery means: - Greater power of tool What type of power load must be used in the low velocity tool? Why? - Power load with a crimped end must be used cause high power load would get lodged in the tool 6 colours ranging from lowest strength to highest strength for power load are: - 1. Grey 2. Brown 3. Green 4. Yellow 5. Red 6. Purple Power loads should not be carried loosely in pockets or aprons. Why? - Could be set off causing serious injury or death Fasteners used in explosive actuated tools are: - Manufactured from special steel and tempered A drive pin is a fastener used to: - Permanently attach one material to another What is base material? - Material which the fastener shank is driven into To determine the sustainability of a base material, use a fastener as a centre punch struck by a single average hammer blow. If the fastener is blunted ( meaning it can't fasten) the material is too: - Hard To determine the sustainability of a base material, use a fastener as a centre punch struck by a single average hammer blow. If the fastener penetrates easily, do not fasten because the material is too: - Soft To determine the sustainability of a base material, use a fastener as a centre punch struck by a single average hammer blow. If the material cracks or shatters, do not fasten because the material is too: - Brittle A threaded knurled pin is designed for what material - Mild steel To be a qualified operator of an explosive actuated tool you must posses: - training in the use of each tool and familiarity with local safety regulations OH&S states that operators of explosive actuate tools should always wear: - Eye protection If a tool is found to be defective, you should: - Mark it defective and call a service representative According to OH&S, what safety equipment is required when using an explosive actuate tool in a confined area such as a small room? - ear plugs and eye protection Who is responsible if an accident occurs as a result of an unattended explosive actuated tool? - The operator Should an explosive actuated tool be used in explosive or flammable area? - No How often should an explosive actuated tool be cleaned under normal working conditions? - It should be cleaned daily or when it becomes sluggish How much oil should be added to the tool parts after cleaning? - None What part requires replacement most often in a low velocity tool? - Buffer With a low velocity tool, what is a general rule of thumb for the placement and depth of fasteners in steel? - 1/2" from the edge, 2" apart and 1/4" deep Do not fasten near welds with a low velocity tool because the steel may have been hardened making the metal brittle - True Tension load in regards to explosive actuated tools is: - a force applied perpendicular to the base of the material Shear load in regards to explosive actuated tools is: - a force applied perpendicular to the fastener Bending load in regards to explosive actuated tools is: - shear force that is applied at a distance for the surface base of the material creating a lever-type action on the fastener With a low velocity tool, what is a general rule of thumb for the placement and depth of fasteners in concrete? - 3" from the edge and from each other How long should you wait if a power actuated tool misfires? - 30 seconds What is another name for a power saw? - Reciprocating saw What determines the size (capacity) of a power hacksaw? - Largest square piece that can be cut Why is the pressure removed from the blade of a power hack saw on the return stroke? - To prevent damage to the blade How is the speed of a power hacksaw expressed? - Strokes per minute Describe the characteristics of a bimetal power hacksaw blade - High speed tooth edge with a tough alloy steel back How does the blade set differ from the blade kerf? - Kerf is the width the blade cuts and set is the way individual teeth are bent out of line with the body What are the limitations of a horizontal band saw as it relates to cutting curves or round corners? - It can only cut straight How is feed rate controlled on a horizontal band saw? - An adjustable hydraulic cylinder IS it necessary to turn a horizontal band saw off manually after completing a cutting operation? Why or Why not? - No because a switch is automatically activated by the downward motion of the upper frame What re the saw guides and where should you place them when you are using a horizontal band saw? - They guide the blade and should be adjusted to as close as possible to the work If the blade jumps and shudders when you are using a horizontal band saw, what could be the problem? - The feed rate is too high When cutting short pieces to length, what can be done to ensure that the jaws of the clamping device make good contact and do not distort - Placing a similar piece in the back What is another name for a contour band saw? - Vertical band saw What is tracking as it relates to band saw? - Centering the blade on the pulleys What characteristics differentiate styles of band saw blades? - Material, width, gauge, pitch, type of tooth What is the advantage of using a bimetal blade in a band saw? - Greater wear and heat resistance, faster cutting and better durability Where should you place the weld when you are welding band saw blades? - Bottom of a tooth gullet The width of the saw blade cut in the workpiece is called: - kerf The purpose of draw filing is to: - produces a smooth and flat surface The removable serrated jaws on a bench vise made from: - aluminum How do you designate the size of a bench vise? - Width of jaws A standard screwdriver blade maintains a