30 Questions
What is the correct way to hold flat or sheet work on a grinding machine?
Holding it in a way that prevents hammering or vibration
What should you do to maintain even wear on the abrasive wheel?
Move the work across the face of the wheel
What is the risk of using the side of an abrasive wheel not designed for side grinding?
The wheel may break or the work may become jammed
Why should you avoid quenching high-speed steel work directly in cold water?
It may cause cracking of the edge
What is the primary reason for the loss of cutting efficiency of a grinding wheel?
The abrasive particles become blunt from cutting the hard material
What is the purpose of having a container of cool, clean water nearby when grinding small work?
To cool the work as it becomes heated
How can glazing of the grinding wheel be prevented?
By selecting a wheel with a softer grade of bond
What is the recommended way to cool small work made from high-speed steel after grinding?
Allowing it to cool in air
What is the main cause of grooving on the surface of the grinding wheel?
Applying too much pressure in one position
Why should you avoid grinding on the outside edges of the wheel?
It results in rapid wear and causes a curved surface on the wheel
What is the primary reason for selecting the correct type of wheel for the material being ground?
To prevent loading and glazing conditions
Why should you not use a small bench grinder for heavy, rough grinding?
It is not designed for heavy, rough grinding and may damage the grinder
What is a key reason to keep the drill cutting and not allowing it to just rub?
To prevent the drill from becoming blunt
What type of lubricant is suitable for drilling copper and brass?
Kerosene
What is the correct order of steps when drilling a part?
Select the correct size drill, check the speed, hold work securely, feed the drill slowly
Why should you wear eye protection when drilling?
To protect your eyes from potential debris
What should you do before drilling a hole with a diameter greater than 10 mm?
Drill a pilot hole
What should you inspect before using a drill?
Electrical cords and air hoses, and the tools themselves for damage
What is the recommended air pressure at the tool according to most manufacturers?
90 psi
Why should you avoid directing compressed air at another person?
It can cause serious injury or death
What should you do to protect the air hose from damage?
Move it out of the way of vehicles and avoid dragging around sharp corners
Why should you check the exhaust air ducts on the tool?
To ensure they are clean and not damaged
What should you do before connecting or disconnecting any pneumatic tools?
Turn off the air supply
Why should you not use compressed air to clean your clothes or hair?
It can cause eye damage or ruptured ear drums
What is the recommended direction of rotation for the spindle on the right?
Clockwise
What is the result of using the wrong type of wheel for the material being ground?
Loading of the grinding wheel
What is the purpose of referring to the manufacturer's handbook for the grinding wheel?
To review the specification of the wheel
What is the characteristic of a grinding wheel suitable for grinding soft, ductile materials?
Wide spacing of the grains
What is the result of grinding hard materials on a wheel with too hard a grade of bond?
Glazing of the grinding wheel
What is the purpose of off-hand grinding?
To grind specific shapes or profiles
Test your knowledge on maintenance practices for grinding machines, including wheel direction of rotation, thread types, and common issues that may arise during off-hand grinding. This quiz is based on CASA Part 66 training materials.
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