Lesson 4 Quiz

The tolerance of a Dia 42 ± 0.02 mm steel shaft is

• 0.02 mm

• 0.04 mm

• 41.98 mm

• 42.01 mm

The maximum diameter of a steel shaft (mm) below is

• 6.960 mm

• 65.985 mm

• 66.025 mm

• 66.040 mm

What is the low limit of a hole of size shown below?

• 22.00 mm

• 22.05 mm

• 22.15 mm

• 22.20 mm

The purpose of using limits and fits in engineering is for

• better accuracy.

• easy lubrication.

• achieving interchangeability.

• obtaining good surface finish.

The 3 type of fits in a limits & fits system are namely clearance fit, transition fit and

• Interrupted fit

• Interference fit

• Intermediate fit

• Interchangeable fit

Running fits and sliding fits are examples of

• Transition fit.

• Clearance fit.

• Very loose fit.

• Interference fit.

In limits and fits, the fitting of a hole basis system is obtained by changing

• the hole size only.

• the shaft size only.

• both the hole and shaft sizes.

• Both the hole and shaft lengths.

In limits and fits, the fitting of a shaft basis system is obtained by changing

• the hole size only.

• the shaft size only.

• both the hole and shaft sizes.

• Both the hole and shaft lengths.

The most dangerous part of the milling machine is the

• knee.

• work table.

• rotating cutter

• rotating spindle.

To protect your eyes during the milling operation, its is most important to

• use safety goggles.

• use swarf (chip) guards.

• stand far away from the cutter.

• look away from the cutting operation.