Question

1. when using a caliper, what does the main scale measure?

a) fine adjustments
b) whole millimeters or inches
c) depth only
d) angles

1. a student measures a part and the caliper shows 12.5 mm. what does the .5 represent?

a) half a millimeter from the vernier scale
b) the zero error of the caliper
c) a measurement mistake
d) the thickness of the jaws

1. when reading a digital caliper, which step should you do first before taking a measurement?

a) apply maximum pressure to the jaws
b) zero the caliper
c) record the last measurement
d) switch it to inch mode

1. a blueprint shows a tolerance of ±0.02 mm. what does this mean?

a) the part must be exactly the dimension shown, with no variation
b) the part can vary by 0.02 mm above or below the dimension
c) the part must be 0.02 mm smaller than the given dimension
d) the part can only vary larger than the given dimension

1. what is the primary purpose of a lockout / tagout (loto) system?

a) to track the number of workers in a lab
b) to prevent accidental startup of a lab
c) to provide first - aid supplies for machines during maintenance
d) to label machine parts for training

1. which of the following is not typically found in a blueprint title block?

a) material type
b) part number
c) revision history
d) air pressure rating

1. pneumatic systems use which medium to transmit power?

a) electricity
b) compressed air
c) hydraulic oil
d) springs

Explanation:

1. The main scale of a caliper measures whole millimeters or inches.
2. In a caliper reading like 12.5 mm, the.5 represents half a millimeter from the vernier scale.
3. Before taking a measurement with a digital caliper, the first step is to zero the caliper.
4. A tolerance of ±0.02 mm means the part can vary 0.02 mm above or below the dimension.
5. The primary purpose of a lockout/tagout (LOTO) system is to prevent accidental startup of a machine.
6. Air pressure rating is not typically found in a blueprint title block.
7. Pneumatic systems use compressed air to transmit power.

Answer:

1. B. Whole millimeters or inches
2. A. Half a millimeter from the vernier scale
3. B. Zero the caliper
4. B. The part can vary 0.02 mm above or below the dimension
5. B. To prevent accidental startup of a machine
6. D. Air pressure rating
7. B. Compressed air