Engineering Metrology MCQs (Multiple-Choice Questions)

1. Why do we use a toolmaker's flat?

1. A toolmaker's flat is used to check the flatness.
2. A toolmaker's flat is used to check the surface quality.
3. A toolmaker's flat is used to make sure that the surface of the component is according to the required specifications.
4. All of the above

Answer: D) All of the above

Explanation:

The tool maker's flat is one of the most commonly used precision measuring tools that is widely used in the manufacturing industry. This tool is used to check the flatness and surface quality of a workpiece or a component. This tool makes sure that the surface of the component is the same according to the required resistances and specifications.

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2. Which of the following is not used to make the toolmaker's flat?

1. Granite
2. Cast iron
3. Plastic
4. Hardened steel

Answer: C) Plastic

Explanation:

A toolmaker's flat is made from really high-quality materials such as granite, cast iron, and hardened steel because these materials are proven to provide better stability and resistance than longevity in terms of accuracy.

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3. What do you mean by calibration?

1. Calibration is a process that verifies the accuracy of the measuring equipment
2. Calibration is a process that equipment goes through once it is ready, where its length and height are verified
3. Calibration is the process of documenting all the specifications of the measuring equipment
4. None of the above

Answer: A) Calibration is a process that verifies the accuracy of the measuring equipment

Explanation:

Calibration is the process of verifying and checking the accuracy of measuring equipment. This process can take place regularly or in periods, which is known as periodic calibration. This process is extremely essential as it verifies the equipment by checking its durability and reliability over time, which of course helps in maintaining the accuracy of the tool.

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4. What is the use of high-precision surface plates?

1. High-precision surface plates are used in various industries for the calibration of components.
2. High-precision surface plates are used in various industries for precise measurement.
3. High-precision surface plates are used in various industries for better inspection.
4. All of the above

Answer: D) All of the above

Explanation:

High-precision surface plates are used in various industries for calibration of components, precise measurement, and better inspection. Its applications can be seen in aerospace, automotive engineering, and research laboratories.

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5. Which of the following materials for surface plates provides higher stability, minimal disforming, and temperature resistance?

1. Granite
2. Steel
3. Iron
4. Marble

Answer: A) Granite

Explanation:

Among all the given options, surface plates made out of granite provide higher stability, minimal disforming, and temperature resistance, which makes them a popular choice for surface plates in various industries.

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6. The angle between two surfaces of the angle plate is ____.

1. 180 Degrees
2. 90 Degrees
3. 360 Degrees
4. 120 Degrees

Answer: B) 90 Degrees

Explanation:

An angle plate is the most commonly used tool in the manufacturing industry and is designed to hold or support the components at a right angle (90⁰).

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7. Which of the following types of plates prevent unwanted movement within a system?

1. Baffle plate
2. Hinder plate
3. Angle plate
4. Adjustable angle plate

Answer: A) Baffle plate

Explanation:

Baffle plates are used to maintain the flow of fluids such as gases, etc. within the container or piping system. They are designed in such a way that they prevent unwanted movement within the system, which, on the other hand, enhances the efficiency of heat transfer.

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8. Which of the following is used to securely hold any cylindrical component on a milling machine?

1. Angle plates
2. V blocks
3. Clamping pallets
4. Adjustable angle plate

Answer: B) V blocks

Explanation:

A V block is a type of block that is specially designed to securely hold the cylindrical workpieces during different machining operations, such as drilling, milling, or grinding.

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9. ____ are typically utilized during machining operations to accurately center and align cylindrical workpieces.

1. Angle plates
2. V blocks
3. Clamping pallets
4. Bench center

Answer: D) Bench center

Explanation:

Bench centers are typically utilized during machining operations to accurately center and align cylindrical workpieces.

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10. Which of the following components of bench center, is the fixed end of the bench center that holds the drive mechanism?

1. Headstock
2. Tailstock
3. Precision center
4. Mounting surfaces

Answer: A) Headstock

Explanation:

The headstock is a bench center component that serves as the fixed end and holds the drive mechanism. It is located at one end of the bench center and is in charge of keeping the workpiece secure during machining processes.

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11. Which of the following tools is used to identify whether the surface is horizontal or vertical?

1. Baffle plate
2. Spirit level
3. Surface plate
4. Precision center

Answer: B) Spirit level

Explanation:

A spirit level is a type of tool that is used to identify whether the surface is horizontal or vertical. It is also known as bubble level. The bubble inside the spirit level helps identify the surface level.

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12. Which of the following factors determines the sensitivity of the spirit level?

1. Bubble size
2. Frame stability
3. Fluid viscosity
4. All of the above

Answer: D) All of the above

Explanation:

Factors that determine the sensitivity of spirit level:

• Bubble size
• Frame stability
• Fluid viscosity
• Vial quality
• Manufacturing standards

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13. How does bubble size affect the sensitivity of the spirit level?

1. A smaller bubble has greater sensitivity
2. A larger bubble has greater sensitivity
3. Both A and B
4. None of the above

Answer: A) A smaller bubble has greater sensitivity

Explanation:

A smaller bubble has greater sensitivity. This is because a small bubble will quickly show the response to the slight angular variation, which will make it easier to detect the surface line (whether horizontal or vertical).

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14. How does fluid viscosity affect the sensitivity of the spirit level?

1. A higher viscosity fluid enables the bubble to move more easily
2. A lower viscosity fluid enables the bubble to move more easily
3. Both A and B
4. None of the above

Answer: B) A lower viscosity fluid enables the bubble to move more easily

Explanation:

A lower viscosity fluid enables the bubble to move more easily and react faster to even small inclination changes.

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15. Which of the following tools is used to find the radius of a curve?

1. Circumference gauges
2. Circle gauges
3. Radius gauges
4. Radius meter

Answer: C) Radius gauges

Explanation:

Radius gauges are a type of tool that is used to find the radius of a curve. It is a precision measurement tool that consists of a set of separate leaves that are used to specify the radius size.

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16. The outer radius of an object is measured by which of the following tools?

1. Fixed gauges
2. Fillet gauges
3. Digital radius gauges
4. Combination gauges

Answer: B) Fillet gauges

Explanation:

Fillet gauges are typically used to measure the outer radius. The outer radius of a curved surface can be measured with a fillet gauge.

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17. What are feeler gauges?

1. Feeler gauges are thin metal strips that are used to measure the clearance between two parts
2. Feeler gauges are the type of tool that is used to measure the circumference of an object
3. Feeler gauges are the precision measuring tools that are used to find the accuracy of any measuring device
4. All of the above

Answer: A) Feeler gauges are thin metal strips that are used to measure the clearance between two parts

Explanation:

Feeler gauges are thin metal strips that are used to determine how much space there is between two objects. They are frequently used for activities including gap spacing, valve adjustment, and precision measurement.

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18. Which of the following is true about angle gauges?

1. Angle gauges are precision measuring tools that are used to measure angles in industrial applications
2. An angle gauge is a type of tool that is used to securely hold the components at 90 degrees
3. An angle gauge is a type of tool that is used to measure the radius of an object
4. Angle gauges are a type of tool that is used to provide support to cylindrical objects

Answer: A) Angle gauges are precision measuring tools that are used to measure angles in industrial applications

Explanation:

Angle gauges are precision measuring tools that are used to measure angles in industrial applications. They are also known as angle blocks.

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19. Which of the following is true about vernier height gauges?

1. Vernier height gauges are a type of instrument that is used to measure the height of objects
2. Vernier height gauges are a type of instrument that is used to measure the width of objects
3. Vernier height gauges are a type of instrument that is used to measure the length, height, and width of an object
4. Vernier height gauges are a type of instrument that is used to measure the height of only cylindrical objects

Answer: A) Vernier height gauges are a type of instrument that is used to measure the height of objects

Explanation:

: Vernier height gauges are a type of instrument that is used to measure the height of objects. It consists of two types of scales: the main scale and the sliding vernier scale, which are used to measure height with accuracy and precision.

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20. Which of the following is the main component of the vernier height gauge?

1. Slider
2. Measuring jaw
3. Vernier scale
4. Vertical beam

Answer: D) Vertical beam

Explanation:

The vertical beam is the gauge's primary vertical component, on which the slider and measuring jaw are mounted.

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21. Which of the following components of the vernier height gauges comes in direct contact with the object to be measured?

1. Base
2. Measuring jaw
3. Vernier scale
4. Main scale

Answer: B) Measuring jaw

Explanation:

The part on the top of the Vernier height gauge that comes into direct contact with the object being measured is known as the measuring jaw. It serves as a reference point for measuring the object's height.

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22. Among master height gauges and vernier height gauges which of the following provides a more accurate and precise calculation?

1. Master height gauges
2. Vernier height gauges
3. Both A and B
4. None of the above

Answer: A) Master height gauges

Explanation:

Vernier height gauges are less accurate and precise than master height gauges. Master height gauges are frequently used as calibration reference standards.

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23. Among master height gauges and vernier height gauges which of the following is more versatile?

1. Master height gauges
2. Vernier height gauges
3. Both A and B
4. None of the above

Answer: B) Vernier height gauges

Explanation:

Vernier height gauges are more versatile and widely utilized for a variety of height-measuring activities, whereas master height gauges are specialized instruments primarily used for calibration.

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24. Which of the following tools uses electronic sensors to measure the length of the object?

1. Length gauges
2. Digital height gauges
3. Digital length gauges
4. Universal measuring instrument

Answer: C) Digital length gauges

Explanation:

Digital length gauges are a type of measuring instrument that uses electronic sensors to measure the length of an object. It provides precise, quick, and easy-to-read calculations.

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25. Which of the following tools is used to measure the internal diameter of hollow, circular, or cylindrical objects?

1. Internal micrometer
2. Inside micrometer
3. Universal inside micrometer
4. Universal internal macrometer

Answer: B) Inside micrometer

Explanation:

An inside micrometer is a type of measuring instrument that is used to measure the internal diameter of hollow, circular, or cylindrical objects. This tool plays an important part in calculating the diameters of hard-to-reach places.

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26. Which of the following components of a micrometer provides the structure and stability for the micrometer?

1. Thimble
2. Barrel
3. Frame
4. Anvil

Answer: C) Frame

Explanation:

The frame is the component of the micrometer that provides the structure, stability, and support of the measurement process.

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27. What is the use of the thimble component in the micrometer?

1. The thimble is the component that comes into contact with the object being measured
2. The thimble is the rotating component that is spun to pull back the spindle during the measuring process
3. Thimbles are the components that hold the spindle in place
4. The thimble is the component that ensures steady and uniform pressure is delivered

Answer: B) The thimble is the rotating component that is spun to pull back the spindle during the measuring process

Explanation:

The thimble is the rotating component that is spun to pull back the spindle during the measuring process.

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28. Which of the following tools is used for accurate measurements of length, thickness, and other dimensions?

1. Shifted Micrometer
2. Inside micrometer
3. Bench micrometer
4. Outside micrometer

Answer: C) Bench micrometer

Explanation:

A bench micrometer is used for accurate measurements of length, thickness, and other dimensions. This tool provides high accuracy and precision calculations and is used in various industries.

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29. What is the principle of slip gauges?

1. Slip gauges are based on the principle that two metal blocks are stacked together to create their specific length
2. Slip gauges are based on the principle of sliding the tool against the object to be measured
3. Slip gauges are based on the principle that the width of the block measures the object
4. Slip gauges are based on the principle where the instrument is fixed over the places and then the object length is calculated using different lengths of blocks

Answer: A) Slip gauges are based on the principle that two metal blocks are stacked together to create their specific length

Explanation:

Slip gauges are based on the principle that two metal blocks are stacked together to create their specific length. These blocks are specially designed to provide accurate calculations.

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30. Round slip gauges are used for which of the following purposes?

1. To measure the fixed length of the circular objects
2. To measure the diameter and radius of the circular objects
3. There is no such tool as round slip gauges
4. To measure only the internal radius of the circular objects

Answer: B) To measure the diameter and radius of the circular objects

Explanation:

Round slip gauges are used to measure the diameter of circular objects. You can adjust them according to the requirements.

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31. Which of the following components of slip gauges is used to prevent damage?

1. Calibration tool
2. Storage cases
3. Wear blocks
4. Clamps

Answer: C) Wear blocks

Explanation:

Wear blocks are used to prevent damage to slip gauges.

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32. An expression of length as a distance between two lines is called a ____.

1. End standard
2. Line standard
3. Fixation standard
4. Line trolled

Answer: B) Line standard

Explanation:

An expression of length as a distance between two lines is called a line standard.

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33. Slip gauges and micrometers come under which of the following categories?

1. End standard
2. Line standard
3. Both A and B
4. None of the above

Answer: A) End standard

Explanation:

An end standard is used when a length is measured by comparing two surfaces, and slip gauges and micrometers come under this category.

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34. ____ helps in the correct measurement of light by giving a precise reference point for specific light wavelengths.

1. Wavelength line standard
2. Wavelength end standard
3. Wavelength standard
4. Wavelength fixation standard

Answer: C) Wavelength standard

Explanation:

Wavelength standard helps in the correct measurement of light by giving a precise reference point for specific light wavelengths.

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35. What do you mean by quality control?

1. Quality control is the term that means the product quality is under control
2. Quality control is a term that means the product has minimal defects
3. Quality control is the term that means the product has fixed quality
4. Quality control is the term used to make sure that the product meets established development, production, customer guidelines, etc

Answer: D) Quality control is the term used to make sure that the product meets established development, production, customer guidelines, etc

Explanation:

Quality control is the term used to make sure that the product meets established development, production, customer guidelines, etc. The main motto of QC is to ensure that the expected objectives are produced in an efficient, effective, and consistent manner.

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36. QA is a subset of QC? True or False.

1. True
2. False

Answer: B) False

Explanation:

False. Quality assurance (QA) and quality control (QC) are two distinct processes that are connected but serve different functions. QA includes the planning of the activities in such a way that it provides confidence that the product or service will fulfill quality requirements. QC is the process of inspecting, testing and checking the product or service to ensure that it meets the specific requirements and standards.

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37. Which of the following is the last step of QA?

1. Developing quality processes
2. Quality reviews
3. Product improvements
4. Customer feedback

Answer: D) Customer feedback

Explanation:

Customer feedback is the last step of QA. Feedback from clients is very important to measure their satisfaction and find areas for improvement.

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38. Verification is an example of QA or QC?

1. QA
2. QC
3. Both A and B
4. None of the above

Answer: A) QA

Explanation:

Verification is an example of quality assurance. Because it entails evaluating work products to see if they fulfill stated requirements and standards.

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39. Unilateral tolerance can be negative and positive. True or False?

1. True
2. False

Answer: B) False

Explanation:

False. It can be either a positive or a negative allowance, but not both simultaneously.

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40. Tolerances that allow variation in both directions are called ____.

1. Unilateral tolerance
2. Limit tolerance
3. Duo tolerance
4. Bilateral tolerance

Answer: D) Bilateral tolerance

Explanation:

Tolerances that allow variation in both directions are called bilateral tolerances.

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41. Which of the following is not true about interferometry?

1. Interferometry is a technique that works by splitting the beam of light into separate beams
2. Interferometry is a contact measurement method, which means it involves the physical touch
3. Interferometry is extremely sensitive and can detect changes at the microscopic level
4. None of the above

Answer: B) Interferometry is a contact measurement method, which means it involves the physical touch

Explanation:

Interferometry is a technique that works by splitting the beam of light into separate beams. It is a non-contact measurement method, which means it does not involve any physical touch. This technique is extremely sensitive and can detect changes at the microscopic level.

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42. What is the principle of optical flats?

1. Interferometry
2. Interference
3. Sliding principle
4. Wavelength standard

Answer: B) Interference

Explanation:

Optical flats work based on the principle of interference. When they come into contact with another surface, they create interference fringes.

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43. Which of the following types of comparators measure dimensional differences using compressed air or gas?

1. Electrical comparators
2. Digital comparators
3. Pneumatic comparators
4. Electronic comparators

Answer: C) Pneumatic comparators

Explanation:

Pneumatic comparators measure dimensional differences using compressed air or gas.

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44. Which of the following types of comparators follows the non-contact measurement principle?

1. Electrical comparators
2. Digital comparators
3. Pneumatic comparators
4. Optical comparators

Answer: D) Optical comparators

Explanation:

In optical comparators, non-contact measurement principles are followed. They measure parts by projecting magnified images of them onto a screen without physically touching them.

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45. Which of the following types of comparators use electronic sensors to provide easily readable measurements of dimensional deviations?

1. Electrical comparators
2. Digital comparators
3. Electronic comparators
4. Optical comparators

Answer: B) Digital comparators

Explanation:

Digital comparators use electronic sensors to provide easily readable measurements of dimensional deviations.

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