Combination locks can be either mechanical or electromechanical built-in locks or portable padlocks.

• A. True
• B. False
• C. Only built-in locks
• D. Only portable padlocks

Answer: (B)

Combination locks are defined by two aspects: the mechanism (mechanical vs. electromechanical) and the form factor (built-in vs. portable padlock). You can have a mechanical combination lock or an electromechanical one, and each can be designed as a built-in lock or as a portable padlock. This means the statement is accurate: combination locks can be either mechanical or electromechanical and can be built-in or portable. The practical takeaway is that all four combinations exist, so no single form factor or mechanism type is exclusive.