Yet Another G-code Quiz!

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| By Coxc9

Coxc9

Community Contributor

Quizzes Created: 1 | Total Attempts: 2,175

Questions: 10 | Attempts: 2,175 | Updated: Mar 21, 2023

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Mathematicians and lovers of all things that involve calculating the diameter of a circle or radius, this quiz is for you. Get ready for your knowledge to be tested on various places that you can use the G-code.

Questions and Answers

1.

What is the g-code for "return to reference point"?
- A.
  
  G27
- B.
  
  G28
- C.
  
  G29
Correct Answer
B. G28

Explanation
The correct answer is G28. G-code is a programming language used in CNC machines to control their movements. G28 is the specific G-code command that instructs the machine to return to its reference point, also known as the home position. This command is commonly used to ensure that the machine is in a known and consistent starting position before starting a new operation.

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1
0
2.

What is the g-code for "return from reference point"?
- A.
  
  G27
- B.
  
  G28
- C.
  
  G29
Correct Answer
C. G29

Explanation
The g-code for "return from reference point" is G29.

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3.

What is the g-code for "INPUT IN INCHES"?
- A.
  
  G20
- B.
  
  G22
- C.
  
  G54
Correct Answer
A. G20

Explanation
The correct answer is G20. In CNC programming, G20 is the g-code used to specify that the input units are in inches. This means that all dimensions and measurements entered into the program will be interpreted as inches, allowing for accurate machining operations in the imperial system of measurement. G22, on the other hand, is the g-code used to specify that the input units are in millimeters. G54 is a g-code used to specify the coordinate system offset, but it is not specifically related to input units.

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4.

What is the g-code for "INPUT IN MM"?
- A.
  
  G56
- B.
  
  G72
- C.
  
  G21
Correct Answer
C. G21

Explanation
The correct answer is G21. In G-code, G21 is used to set the units of measurement to millimeters. This means that any subsequent movements or commands will be interpreted and executed in millimeters.

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5.

What is the g-code used to "measure the diameter and center of a hole"?
- A.
  
  G27
- B.
  
  G31
- C.
  
  G38
Correct Answer
C. G38

Explanation
G38 is the correct answer because it is the g-code used to measure the diameter and center of a hole. G38 initiates a probing cycle where the machine moves towards the hole until it makes contact, measures the position, and calculates the diameter and center coordinates. This g-code is commonly used in CNC machining to ensure accurate hole dimensions and alignment.

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6.

What is the g-code for "scaling off"?
- A.
  
  G38
- B.
  
  G41
- C.
  
  G48
Correct Answer
C. G48

Explanation
G48 is the correct g-code for "scaling off". G48 is used in CNC programming to cancel the scaling function. Scaling is the process of resizing or adjusting the dimensions of a part or object. By using G48, the scaling function is turned off, meaning that the dimensions of the part will not be changed or adjusted during the machining process.

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7.

What is the g-code for "tool length compensation cancel"?
- A.
  
  G44
- B.
  
  G47
- C.
  
  G49
Correct Answer
C. G49

Explanation
The g-code for "tool length compensation cancel" is G49.

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8.

What is the g-code for "boring, no dwell, feed out"?
- A.
  
  G84
- B.
  
  G85
- C.
  
  G86
Correct Answer
B. G85

Explanation
The g-code for "boring, no dwell, feed out" is G85.

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9.

What is the g-code for "boring, spindle stop, rapid out"?
- A.
  
  G84
- B.
  
  G86
- C.
  
  G89
Correct Answer
B. G86

Explanation
The g-code for "boring, spindle stop, rapid out" is G86.

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10.

What is the g-code for "drilling cycle, dwell"?
- A.
  
  G79
- B.
  
  G54
- C.
  
  G82
Correct Answer
C. G82

Explanation
The correct answer is G82. G82 is the g-code used for a drilling cycle with a dwell. This means that the machine will perform a drilling operation and then pause for a specified amount of time before retracting the tool. This g-code is commonly used in CNC machining to automate the drilling process and ensure consistent and accurate hole drilling.

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Current Version
Mar 21, 2023

Quiz Edited by
ProProfs Editorial Team
Dec 02, 2010

Quiz Created by
Coxc9

Yet Another G-code Quiz!

What is the g-code for "return to reference point"?

What is the g-code for "return from reference point"?

What is the g-code for "INPUT IN INCHES"?

What is the g-code for "INPUT IN MM"?

What is the g-code used to "measure the diameter and center of a hole"?

What is the g-code for "scaling off"?

What is the g-code for "tool length compensation cancel"?

What is the g-code for "boring, no dwell, feed out"?

What is the g-code for "boring, spindle stop, rapid out"?

What is the g-code for "drilling cycle, dwell"?