Junior Foreman Interview Questions and Answers

The speed chosen for threading in a lathe depends on factors like material, thread pitch, and diameter.

• The speed should be appropriate for the material being threaded - higher speeds for softer materials and lower speeds for harder materials.

• Consider the thread pitch - finer pitches may require slower speeds to ensure accuracy.

• Take into account the diameter of the workpiece - larger diameters may require slower speeds to prevent vibration and ensure a clean thread.

• Consult the...read more

The M10 tap drill size is 8.5mm.

• The tap drill size for an M10 thread is typically 0.75 x the major diameter of the thread, which is 10mm. Therefore, the tap drill size is 10mm x 0.75 = 8.5mm.

• It is important to use the correct tap drill size to ensure proper thread engagement and strength.

• Using a drill size chart or a tap and drill size guide can help determine the correct tap drill size for different thread sizes.

Pitch sizes range from M6 to M20 in the context of fasteners.

• Pitch size refers to the distance between adjacent threads on a screw or bolt.

• Common pitch sizes in this range include M6, M8, M10, M12, M16, and M20.

• For example, M6 has a pitch size of 1.0mm, M8 has a pitch size of 1.25mm, and M10 has a pitch size of 1.5mm.

Hydraulic systems use fluid to transmit power and control machinery.

• Hydraulic systems use a pump to pressurize fluid, which is then used to generate force or motion.

• They consist of components like pumps, cylinders, valves, and hoses.

• Hydraulic systems are commonly used in heavy machinery, such as construction equipment and industrial machinery.

• They are also used in automotive braking systems and aircraft flight control systems.