WorksheetsPrecision Machining and Benchwork
Total questions: 10
Worksheet time: 5mins
What is the purpose of a micrometer?
To play music
To cook food
To measure time
To measure small distances or thicknesses with precision.
Explain the safety procedures to be followed while using a bench grinder.
Adjust the tool rest while the grinder is running, wear gloves with holes, and use the grinder on a wet surface
Wear safety goggles and gloves, adjust the tool rest, and securely hold the workpiece.
Wear sandals and shorts, keep the tool rest far away, and use the grinder with wet hands
Use the grinder without safety goggles, hold the workpiece with one hand, and stand directly in front of the wheel
Why is it important to consider material properties when selecting a material for machining?
To make the material heavier
To increase the cost of machining
To make the material harder to machine
To ensure the material can be effectively and efficiently machined without causing excessive tool wear or damage.
Name three common measuring tools used in precision machining.
Screwdriver, Hammer, Saw
Micrometers, Calipers, Dial Indicators
Wrench, Drill, Chisel
Ruler, Pencil, Eraser
What are the safety precautions to be taken when working with power tools in a machining workshop?
Leaving tools and materials scattered on the floor
Using tools with damaged cords or plugs
Wearing sandals and shorts while working
Wearing appropriate personal protective equipment (PPE), ensuring tools are in good condition, using tools according to manufacturer's instructions, and keeping work area clean and organized.
How does the hardness of a material affect its machinability?
Harder materials are more difficult to machine.
Softer materials are more difficult to machine.
The hardness of a material has no effect on its machinability.
Harder materials are easier to machine.
What is the function of a dial indicator in precision machining?
To play music
To measure large distances
To cook food
To measure small distances or angles with high precision
Describe the proper technique for using a vernier caliper to measure the dimensions of a workpiece.
Hold the caliper at an angle and guess the measurement
Gently close the jaws around the workpiece and read the measurement from the scale and vernier scale.
Slam the jaws shut around the workpiece and estimate the measurement
Use the caliper to scratch the workpiece and then measure the scratch
Why is it important to wear safety goggles when working with metal during benchwork?
To improve vision in dim lighting
To keep the hair out of the face
To look cool and professional
To protect the eyes from metal particles or debris.
What factors should be considered when selecting a cutting tool for a specific machining operation?
Material being machined, cutting speed, feed rate, depth of cut, and tool material
Size of the cutting tool
Color of the cutting tool
Brand of the cutting tool
