Vernier Depth Gauge Measurement Concepts

The video tutorial explains the use of a vernier depth gauge, a linear measuring instrument used to measure the depth from a plane surface to the bottom of a recess. It covers the components of the gauge, including the main scale, vernier scale, and fine adjustment screw. The tutorial provides step-by-step instructions on how to use the gauge, emphasizing the importance of a flat reference surface and correct pressure application. It also highlights common errors to avoid, such as tilting and incorrect resting positions, to ensure accurate measurements.

What is the primary use of a vernier depth gauge?

• To measure the width of a slot

• To measure the height of an object

• To measure the depth from a plane surface to the bottom of a recess

• To measure the diameter of a hole

Which part of the vernier depth gauge is similar to that of a vernier caliper?

• The base

• The fine adjustment screw

• The main scale and vernier scale

• The lock screw

What is the similarity between the vernier depth gauge and the vernier caliper?

• Both have a base

• Both use a main scale and vernier scale

• Both measure height

• Both have a lock screw

What is the function of the fine adjustment screw on a vernier depth gauge?

• To calibrate the vernier scale

• To ensure optimum pressure is applied for accurate measurement

• To lock the scale in place

• To adjust the base

What is the role of the lock screw on a vernier depth gauge?

• To lock the measurement in place

• To adjust the vernier scale

• To adjust the base

• To calibrate the main scale

How should the vernier depth gauge be positioned to measure the depth of a hole?

• The base should be above the surface

• The base should be tilted slightly

• The base should rest on the reference surface

• The base should rest on the bottom of the hole

What should be ensured about the reference surface for accurate measurement?

• It should be tilted

• It should be free from swarf and bars

• It should be above the base

• It should be rough

What is the correct measuring pressure for using a vernier depth gauge?

• Equivalent to pressing hard on a piece of paper

• Equivalent to making a light dot on a piece of paper with a pencil

• Equivalent to pressing lightly on a sponge

• Equivalent to pressing hard on a metal surface

What should be avoided to ensure the vernier depth gauge does not tilt?

• Keeping the base on a rough surface

• Applying too much pressure

• Resting the base on the bottom of the hole

• Ensuring the base is flat and stable

What happens if the base of the vernier depth gauge is above the surface?

• The measurement will be from the surface to the top of the base

• The measurement will be from the surface to the bottom of the hole

• The measurement will be accurate

• The measurement will be from the base to the bottom of the hole