Understanding Mechanical Instruments Quiz

Which of the following instruments is best suited for measuring the external diameter of a small cylindrical object with high precision?

• Vernier calliper

• Micrometer screw gauge

• Steel rule

• Measuring tape

What is the primary purpose of calibrating a mechanical measuring instrument?

• To clean the instrument

• To ensure measurement accuracy

• To increase the instrument's lifespan

• To make the instrument lighter

Which instrument would you use to measure the depth of a hole accurately?

• Vernier depth gauge

• Spring balance

• Protractor

• Spirit level

Which of the following is a limitation of using a steel rule for measurement?

• It can only measure temperature

• It is not suitable for measuring curved surfaces accurately

• It requires batteries to operate

• It is waterproof

What is the correct method to read a vernier calliper?

• Read only the main scale

• Add the main scale reading to the vernier scale reading

• Subtract the vernier scale reading from the main scale

• Multiply the main scale by the vernier scale

Which of the following best describes 'precision' in measurement?

• The closeness of a measurement to the true value

• The ability to repeat measurements with little variation

• The speed of taking a measurement

• The cost of the instrument

Which instrument is commonly used to measure the mass of an object in a laboratory?

• Spring balance

• Beam balance

• Vernier calliper

• Micrometer screw gauge

What is the first step in maintaining a mechanical measuring instrument?

• Lubricate all moving parts

• Clean the instrument after use

• Store it in a damp place

• Disassemble the instrument

Which of the following is a common application of a spirit level?

• Measuring temperature

• Checking the horizontality of a surface

• Measuring mass

• Measuring internal diameter

Why is it important to avoid parallax error when reading a scale?

• It makes the instrument heavier

• It can lead to inaccurate measurements

• It increases the cost of measurement

• It damages the instrument