Vernier Caliper + Micrometer Screw Gauge

The diagram below shows part of a vernier caliper used to measure the diameter of a soft drink can. What is the reading shown?

• 6.34 cm

• 6.44 cm

• 7.24 cm

• 7.26 cm

Minimum length an instrument can measure is called its,

• Accuracy

• Estimate

• Precision

• Resolution

Error due to position of the eye relative to a scale is,

• visual error

• parallax error

• fractional error

• zero error

Figure 1 shows a reading of a vernier caliper when its jaws are fully closed. Figure 2 shows the reading of the same vernier caliper when it measures the diameter of a steel rod. The diameter of the steel rod is,

• 9.17 cm

• 9.26 cm

• 9.34 cm

• 9.39 cm

The diagram shows part of a micrometer screw gauge. What is the reading shown?

• 2.23 mm

• 2.523 mm

• 2.73 mm

• 3.23 mm

What is the zero error shown by the micrometer screw gauge in the figure?

• +0.47 mm

• +0.03 mm

• -0.03 mm

• -0.47 mm

The most suitable measuring instrument to measure the external diameter of a soft rubber tube having its value of the order of 1 cm is,

• Meter ruler

• Vernier caliper

• Micrometer screw gauge

• Measuring tape

When the thimble of a micrometer screw gauge, having a pitch of 0.5 mm and 50 circular divisions, turns 7 revolutions, what will be the distance between the anvil and the spindle?

• 3.5 mm

• 25 mm

• 7 mm

• 0.07 cm

A manufacturer needs to measure accurately the dimensions of a wooden floor tile. The approximate dimensions of the tile are shown. Which instrument is suitable to measure width accurately?

• Meter ruler

• Vernier caliper

• Micrometer Screw Gauge

• Measuring tape

The main scale of an instrument consists of  mm divisions. 49 parts of the main scale coincides with 50 vernier divisions. The least count of the instrument is,

• 0.1 mm

• 0.2 mm

• 0.01 mm

• 0.02 mm