Introduction to Machine Shop Trade
40 Questions
1 Views

Choose a study mode

Play Quiz
Study Flashcards
Spaced Repetition
Chat to lesson

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

What is a job shop primarily defined by?

  • Focusing on repair and maintenance of machinery
  • Producing mass quantities of identical items
  • Specializing in a wide range of machining jobs of limited quantity (correct)
  • Operated by a large number of machine operators

    • How does a limited-production shop differ from a job shop?

  • It manufactures identical parts in limited quantities (correct)
  • It focuses exclusively on high-volume production
  • It is used mainly for repairs rather than production work
  • It produces unique, custom projects only

    • What type of work is often characteristic of job shops?

  • High-volume assembly lines
  • Automated manufacturing processes
  • Continuous production of standard items
  • Prototype development from design ideas (correct)

    • In what scenario is overtime work most likely to be needed in a job shop?

    <p>To finish work within a tight deadline</p> Signup and view all the answers

    What does the term 'job' refer to in the context of a job shop?

    <p>The specific product that needs to be made</p> Signup and view all the answers

    What differentiates mass-production shops from job shops?

    <p>Mass-production shops manufacture items in large quantities</p> Signup and view all the answers

    Which of the following best describes the capabilities of a limited-production shop?

    <p>Manufacturing identical parts in moderate quantities</p> Signup and view all the answers

    Which of the following is NOT a characteristic of a job shop?

    <p>Focusing on high-volume production runs</p> Signup and view all the answers

    What is one key difference between a technician and a technologist?

    <p>Technologists have more responsibilities than technicians.</p> Signup and view all the answers

    Which statement is true regarding the educational requirements of technicians and technologists?

    <p>Technologists have an engineering degree.</p> Signup and view all the answers

    Who is primarily responsible for the application of innovative ideas?

    <p>Technicians</p> Signup and view all the answers

    What is a responsibility of a technologist that sets them apart from a technician?

    <p>Developing innovative ideas</p> Signup and view all the answers

    Which profession is considered to be more skilled than a technician?

    <p>Tool-and-die Maker</p> Signup and view all the answers

    What distinguishes an all-around machinist from a machine tool operator?

    <p>All-around machinists can handle multiple tasks.</p> Signup and view all the answers

    Which of the following describes the role of a layout man?

    <p>They prepare parts for machining.</p> Signup and view all the answers

    Which statement correctly describes the relationship between technicians and technologists?

    <p>Technicians work under the guidance of technologists.</p> Signup and view all the answers

    What element is commonly added to steel to retard rusting?

    <p>Copper</p> Signup and view all the answers

    What is the function of nickel in stainless steel?

    <p>To assure better corrosion resistance</p> Signup and view all the answers

    What is the typical chromium content range in stainless steels?

    <p>10 to 26 percent</p> Signup and view all the answers

    Which type of iron is known for its brittleness and inability to be hammered?

    <p>Cast iron</p> Signup and view all the answers

    What is the primary advantage of tool-and-die steels compared to carbon tool steels?

    <p>Ability to cut at dull red temperatures</p> Signup and view all the answers

    What percentage of carbon does cast iron typically contain?

    <p>24 percent</p> Signup and view all the answers

    What property of malleable iron makes it less brittle than regular cast iron?

    <p>Annealing process</p> Signup and view all the answers

    Which alloying element is used to improve the strength of super alloys for high-temperature service?

    <p>Titanium</p> Signup and view all the answers

    What is the definition of cutting speed on a lathe?

    <p>The speed at which the workpiece travels past the cutting tool</p> Signup and view all the answers

    Which of the following factors does NOT typically affect cutting speed selection?

    <p>Color of the workpiece</p> Signup and view all the answers

    What happens if the cutting speed is too high?

    <p>The cutting tool edge breaks down rapidly</p> Signup and view all the answers

    Cutting speed is expressed in which units?

    <p>Meters per minute or feet per minute</p> Signup and view all the answers

    What is the formula for calculating cutting speed?

    <p>CS = πDN</p> Signup and view all the answers

    The spindle speed is related to which of the following?

    <p>Combination of gears and revolutions per minute</p> Signup and view all the answers

    Which of these is essential for establishing a sequence of operation for machining?

    <p>Calculating the required machining time</p> Signup and view all the answers

    What is a potential outcome of using cutting speeds that are too low?

    <p>Time loss in machining operations</p> Signup and view all the answers

    What is the primary goal of a finishing cut?

    <p>To make the work smooth and accurate</p> Signup and view all the answers

    Which of the following factors affects the rate at which metal is cut off?

    <p>Depth of cut</p> Signup and view all the answers

    What is the formula for calculating the depth of cut?

    <p>t = D - d / 2</p> Signup and view all the answers

    What is the common depth of cut in relation to feed?

    <p>5-10 times the feed</p> Signup and view all the answers

    Which of the following best defines sliding feed?

    <p>Feed is in lengthwise direction of the work piece</p> Signup and view all the answers

    How do you calculate metal removal rate (MRR)?

    <p>Volume removed divided by cutting time</p> Signup and view all the answers

    When the diameter of the work surface decreases from 100 mm to 50 mm, what is the depth of cut?

    <p>25 mm</p> Signup and view all the answers

    What does the length of the cut divided by feed rate per minute give?

    <p>Cutting time</p> Signup and view all the answers

    Study Notes

    Introduction to Machine Shop Trade

    • Various divisions exist in the Machine Shop Trade, including types of machines, skills required, and shop categories.
    • Machine shops are categorized into Job Shops, Limited-Production Shops, and Mass-Production Shops.

    Job Shop

    • A Job Shop is designed for specialized, limited quantity machining tasks, often for prototypes or unique repairs.
    • Tasks may range from making single pieces to several dozen.
    • Job Shops are frequently utilized for machinery repairs when manufacturers lack maintenance departments.

    Limited-Production Shop

    • Limited-Production Shops operate between Job Shops and Mass-Production Shops.
    • These facilities produce identical parts in quantities from hundreds to thousands.

    Technicians vs. Technologists

    • Technicians possess practical technology understanding; technologists have comprehensive knowledge and are usually more educated.
    • Technologists hold engineering degrees, while technicians generally have lower-level qualifications or diplomas.
    • Technologists handle innovative ideas and complex tasks, whereas technicians focus on application and routine operations.

    Skilled Trades Opportunities

    • Machine Tool Operator: Operates a single machine or performs a few operations; relatively routine job.
    • All-Around Machinists: Skilled in setting up and operating various machine tools; capable of reading prints and making adjustments.
    • Tool-and-Die Makers: Highly skilled, responsible for designing, making, and repairing tools and dies used in manufacturing.
    • Layout Men: Skilled machinists who prepare parts for machining by reading prints and transferring measurements.
    • Setup Men: Prepare machines for operation, ensuring readiness for machine operators.

    Material Properties

    • Stainless steels contain 10-26% chromium; nickel is added for corrosion resistance.
    • Tool-and-die steels maintain hardness at elevated temperatures and can cut effectively without dulling.
    • Cast iron is economical, common in machine parts but brittle; types include white iron, gray iron, and malleable iron.

    Machining Parameters

    • Cutting speed is crucial; expressed as meters per minute or feet per minute, depending on machine type.
    • Ideal cutting speeds vary based on material, tool type, and purpose.
    • Depth of cut, feed, and cutting speed are essential for determining metal removal rates.

    Feeding Types

    • Sliding Feed: Occurs along the length of the workpiece.
    • Surfacing Feed: Directed towards the center of the workpiece.

    Metal Removal and Cutting Time

    • Metal removal rate equals the volume of material removed divided by cutting time.
    • Cutting time/operational time estimation involves feed rates and cut lengths.

    Example Calculation Techniques

    • Examples for calculating RPM, cutting speed, and depth of cut demonstrate practical application of machining principles.
    • Formulas introduced include cutting speed and depth of cut measurements essential for effective practice in machining.

    Studying That Suits You

    Use AI to generate personalized quizzes and flashcards to suit your learning preferences.

    Quiz Team

    Related Documents

    Learning Guide: Introduction to Machine Shop Trade - PDF

    Description

    This quiz covers the fundamental concepts of machine shop trade. You will explore various trades and professions in this field, enhancing your understanding of its significance. Test your knowledge and recall key learnings from the introduction.

    More Like This

    Use Quizgecko on...
    Browser
    Open
    Browser
    Browser