Which statement best describes a thickness gauge?

Which statement best describes a thickness gauge?

• A. An instrument used to measure the thickness and clearance of two points to the nearest thousandth of an inch.
• B. A device that marks the starting point for drilling.
• C. A gauge that displays pressure inside a cylinder.
• D. A tool used to apply torque to fasteners.

Answer: (A)

The main idea being tested is what a thickness gauge actually measures. A thickness gauge is used to determine how thick a material is or how wide the gap between two surfaces is, with high precision. The statement describing a gauge that measures thickness and the clearance between two points to the nearest thousandth of an inch matches that purpose exactly, because it emphasizes both the measurement of thickness and the precise tolerance needed for fit and wear checks. Other tools described in the other options serve different tasks: marking a drilling starting point, showing pressure inside a cylinder, or applying torque to fasteners—none of which describe measuring thickness or clearance.

The main idea being tested is what a thickness gauge actually measures. A thickness gauge is used to determine how thick a material is or how wide the gap between two surfaces is, with high precision. The statement describing a gauge that measures thickness and the clearance between two points to the nearest thousandth of an inch matches that purpose exactly, because it emphasizes both the measurement of thickness and the precise tolerance needed for fit and wear checks. Other tools described in the other options serve different tasks: marking a drilling starting point, showing pressure inside a cylinder, or applying torque to fasteners—none of which describe measuring thickness or clearance.