SOLUTIONS MANUAL
** All Section (Units) included
** End of Section Exercise Solutions
,Table of Contents are given below
Section 1. Introduction to Machining
Section 2. Measurement, Materials, and Safety
Section 3. Job Planning, Benchwork, and Layout
Section 4. Drill Press
Section 5. Turning
Section 6. Milling
Section 7. Grinding
Section 8. Computer Numerical Control
, Solution and Answer Guide: Peter J. Hoffman, Eric S. Hopewell, Precision Machining Technology, 4e, ©2027,
9781337795302; Chapter 1: Introduction to Machining
Solution and Answer Guide
Peter J. Hoffman, Eric S. Hopewell, Precision Machining Technology, 4e, ©2027,
9781337795302; Chapter 1: Introduction to Machining
TABLE OF CONTENTS
End of Section Exercise Solutions ...................................................................................................... 1
Section 1 – Unit 1 Introduction to Machining ......................................................................................... 1
End of Section Exercise Solutions ...................................................................................................... 3
Section 1 – Unit 2 Careers in Machining ................................................................................................. 3
End of Section Exercise Solutions ......................................................................................................4
Section 1 – Unit 3 Workplace Skills .........................................................................................................4
END OF SECTION EXERCISE SOLUTIONS
SECTION 1 – UNIT 1 INTRODUCTION TO MACHINING
1. Define the term machining.
Answer:
Machining is using machine tools to cut materials to desired shapes and sizes.
2. What is a machine tool?
Answer:
A machine operated tool or piece of equipment used to perform machining.
3. What is manufacturing?
Answer:
Production or creation of a durable or consumable good.
4. List four industries that depend on machining.
Answer:
Answers will vary and may include aerospace, automotive, motorsports, power
equipment, medical, food, clothing, electronics plastics, etc.
5. What does the abbreviation CNC stand for?
Answer:
Computer numerical control
1
, Solution and Answer Guide: Peter J. Hoffman, Eric S. Hopewell, Precision Machining Technology, 4e, ©2027,
9781337795302; Chapter 1: Introduction to Machining
6. List two advantages of a CNC machine compared with a manual machine tool.
Answer:
CNC machines can produce intricate, complex shapes with extreme accuracy and
efficiency.
7. List two disadvantages of a CNC machine compared with a manual machine tool.
Answer:
i) CNC machines require a higher initial investment than their manual counterparts.
ii) CNC machines require a higher initial investment than manual machines and require
more programming/setup skill, training, and maintenance than manual machine tools.
8. What is the purpose of the drill press?
Answer:
To perform holemaking operations
9. What machine tool produces cylindrical parts?
Answer:
Lathe
10. Briefly describe the primary purpose of sawing machines.
Answer:
To cut material to rough sizes or remove large portions of material in preparation for
other machining operations.
11. What machine tool is available with either horizontal or vertical spindle orientation and
uses rotating cutting tools to primarily produce flat surfaces?
Answer:
Milling machine
12. Abrasive machining makes use of _______________ to remove material.
Answer:
grinding wheels
13. What does the abbreviation EDM stand for?
Answer:
Electrical discharge machining
14. What are the two types of EDM machines?
Answer:
Ram-type (or sinker-type) EDM and wire-type EDM
15. ________________ uses a high-pressure stream of water containing abrasive particles
to cut material.
Answer:
Water jet machining
2
** All Section (Units) included
** End of Section Exercise Solutions
,Table of Contents are given below
Section 1. Introduction to Machining
Section 2. Measurement, Materials, and Safety
Section 3. Job Planning, Benchwork, and Layout
Section 4. Drill Press
Section 5. Turning
Section 6. Milling
Section 7. Grinding
Section 8. Computer Numerical Control
, Solution and Answer Guide: Peter J. Hoffman, Eric S. Hopewell, Precision Machining Technology, 4e, ©2027,
9781337795302; Chapter 1: Introduction to Machining
Solution and Answer Guide
Peter J. Hoffman, Eric S. Hopewell, Precision Machining Technology, 4e, ©2027,
9781337795302; Chapter 1: Introduction to Machining
TABLE OF CONTENTS
End of Section Exercise Solutions ...................................................................................................... 1
Section 1 – Unit 1 Introduction to Machining ......................................................................................... 1
End of Section Exercise Solutions ...................................................................................................... 3
Section 1 – Unit 2 Careers in Machining ................................................................................................. 3
End of Section Exercise Solutions ......................................................................................................4
Section 1 – Unit 3 Workplace Skills .........................................................................................................4
END OF SECTION EXERCISE SOLUTIONS
SECTION 1 – UNIT 1 INTRODUCTION TO MACHINING
1. Define the term machining.
Answer:
Machining is using machine tools to cut materials to desired shapes and sizes.
2. What is a machine tool?
Answer:
A machine operated tool or piece of equipment used to perform machining.
3. What is manufacturing?
Answer:
Production or creation of a durable or consumable good.
4. List four industries that depend on machining.
Answer:
Answers will vary and may include aerospace, automotive, motorsports, power
equipment, medical, food, clothing, electronics plastics, etc.
5. What does the abbreviation CNC stand for?
Answer:
Computer numerical control
1
, Solution and Answer Guide: Peter J. Hoffman, Eric S. Hopewell, Precision Machining Technology, 4e, ©2027,
9781337795302; Chapter 1: Introduction to Machining
6. List two advantages of a CNC machine compared with a manual machine tool.
Answer:
CNC machines can produce intricate, complex shapes with extreme accuracy and
efficiency.
7. List two disadvantages of a CNC machine compared with a manual machine tool.
Answer:
i) CNC machines require a higher initial investment than their manual counterparts.
ii) CNC machines require a higher initial investment than manual machines and require
more programming/setup skill, training, and maintenance than manual machine tools.
8. What is the purpose of the drill press?
Answer:
To perform holemaking operations
9. What machine tool produces cylindrical parts?
Answer:
Lathe
10. Briefly describe the primary purpose of sawing machines.
Answer:
To cut material to rough sizes or remove large portions of material in preparation for
other machining operations.
11. What machine tool is available with either horizontal or vertical spindle orientation and
uses rotating cutting tools to primarily produce flat surfaces?
Answer:
Milling machine
12. Abrasive machining makes use of _______________ to remove material.
Answer:
grinding wheels
13. What does the abbreviation EDM stand for?
Answer:
Electrical discharge machining
14. What are the two types of EDM machines?
Answer:
Ram-type (or sinker-type) EDM and wire-type EDM
15. ________________ uses a high-pressure stream of water containing abrasive particles
to cut material.
Answer:
Water jet machining
2
