Tool life management in CNC Programming - Practice Problems & Coding Challenges

Challenge - 5 Problems

💻 Command Output

intermediate

Tool life counter increment output

Given the CNC tool life management script below, what will be the output after running the increment command once?

CNC Programming

tool_life = {"T1": 5, "T2": 3}

# Increment tool T1 life by 1
if "T1" in tool_life:
    tool_life["T1"] += 1
print(tool_life["T1"])

A Error: Key not found

B 6

C 4

D 5

💡 Hint

Check how the value for T1 is updated before printing.

The script increases the value for key 'T1' by 1, so 5 becomes 6.

🧠 Conceptual

intermediate

Purpose of tool life management in CNC

Why is tool life management important in CNC programming?

A To reduce the number of tools used in the machine

B To increase the speed of the CNC machine beyond limits

C To track and replace tools before they wear out and cause defects

D To automatically program new tools without human input

💡 Hint

Think about quality and machine safety.

Tool life management helps avoid defects and machine damage by timely tool replacement.

🔧 Debug

advanced

Tool life reset script output

What will this script output when resetting tool life counters? code: """ tool_life = {"T1": 10, "T2": 7} for tool in tool_life: tool_life[tool] = 0 print(tool_life) """

A {'T1': 0, 'T2': 0}

B SyntaxError: invalid syntax

C RuntimeError: dictionary changed size during iteration

D TypeError: 'int' object is not iterable

💡 Hint

Modifying values during iteration over keys is allowed in Python dictionaries.

Changing dictionary values during iteration over keys is safe; the output shows all values reset to 0.

🚀 Application

advanced

Calculate remaining tool life percentage

Given the tool life data below, which option correctly calculates the remaining life percentage for tool T3? code: """ tool_life = {"T3": 40} max_life = {"T3": 100} remaining_percentage = ((max_life["T3"] - tool_life["T3"]) / max_life["T3"]) * 100 print(round(remaining_percentage, 1)) """

A 40.0

B 0.4

C Error: division by zero

D 60.0

💡 Hint

Subtract used life from max life, divide by max life, and multiply by 100.

(100 - 40) / 100 * 100 = 60.0 percent remaining life.

📝 Syntax

expert

Identify the syntax error in tool life dictionary comprehension

What syntax error does this code produce? code: """ tool_life = {tool: life + 1 if life > 0 else 0 for tool, life in tool_life.items()} """

A SyntaxError: invalid syntax due to incorrect use of else in comprehension

B KeyError: 'tool_life' not defined

C TypeError: 'int' object is not iterable

D No error, runs successfully

💡 Hint

Check the placement of else in dictionary comprehension with condition.

The else clause must be part of a ternary expression inside the value, not after the if filter.