True or False: It is necessary to check the engineering drawing carefully when multiple fastener types are used in an assembly.

Carefully checking the engineering drawing when multiple fastener types are used in an assembly is indeed necessary. The engineering drawing provides critical information regarding the specifications and requirements for each fastener type, including size, material, and placement. This is essential for ensuring that the assembly meets structural and safety standards, as different fasteners may perform differently based on material properties or loading conditions.

Failure to consult the drawing could lead to improper fastener selection, which may compromise the integrity of the assembly and lead to potential failures in operation. Furthermore, the use of varied fastener types can also influence assembly procedures, torque specifications, and installation techniques that must be adhered to for optimal performance.

The emphasis on checking the engineering drawing is particularly important in complex assemblies where different fasteners may be suited for specific components or load-bearing requirements, making it vital for maintenance of quality control and adherence to engineering standards.