What two factors would you consider when choosing an instrument for measuring a length?

The factors to be considered while selecting a measuring instrument are:

• Accuracy of the instrument.
• Time required to get the output.
• The zero error of the instrument.
• Physical quality of the material by which the instrument is made.

What are the two ways to measure length?

The most common way to measure length is by using the scale on some sort of hand-held tool or implement, but you can also measure length — or distance — with radar, sonar and laser beams.

How do you choose a measuring instrument?

One of the most important aspects of selecting an instrument is making certain that the instrument can provide accurate and reliable data. There is no single standard for this. Before buying a system, make sure it can meet your accuracy and repeatability standards, based on the specifications of your own application.

What are the criteria of choosing a good instrument?

Criteria for selecting instruments

• Feedback. Description. To what degree does the instrument allow to provide sensible/useful feedback to students?
• Improvement opportunity. Description.
• Transfer. Description.
• Prediction of study success. Description.
• Face validity. Description.

What is the most precise instrument for measuring length?

Screw gauge has minimum least count of 0.001cm. Hence, it is most precise instrument.

What are the instruments used to measure length?

The standard instruments used nowadays to measure a length are – ruler, meter scale, measuring tape, vernier caliper, and screw gauge. However, ancient people used instruments like – hand span, foot, arm length, ropes, sticks, etc. to measure length.

What is the important of choosing the right instrument for your study?

They are important for collecting data in all types of research methods. They are mainly used by researchers to collect reliable data which will later be analyzed (Aina, 2004). They include questionnaire, interviews, observations, focus group discussion and experiment.

What are the factors of measurement?

Internal factors include linearity, resolution, precision, and accuracy, all of which are characteristic of a given instrument or system, and dynamic response, drift, and hysteresis, which are effects produced in the process of measurement itself.

What factors influence the choice of survey instrument?

Remember, the two most important factors in selecting an instrument are that the instrument measures your variable of interest and that it is reliable and valid. That information coupled with the other suggestions will assist you in the selection of an excellent instrument.

What are the characteristics of a good measuring instrument?

Proper mechanical make-up of the test concerns on how tests are printed, what font size are used, and are illustrations fit the level of pupils/students. Summary. A good measuring instruments posses’ three qualities, which include: validity, reliability and usability.

What equipment do you use to measure a sample?

For the largest samples, consider contact measuring arms, laser trackers, photogrammetry, or laser radar. For smaller ones, a microscope or other equipment that involves placing the sample on an instrument for measurement may be best. The size of the features you are measuring is also important.

Can you use any kind of measuring instrument with a probe?

The answer to this will tell you whether you can use any kind of measuring instrument with a probe or touch mechanism. If so, contact measuring arms or similar measurement equipment can work on a larger scale, and scanning probe microscopy or atomic force microscopy are options for microscope measurement.

How to assess the capabilities of measuring instruments for manufacturing?

In the lit erature several methods are given for assessing the capabilities of measuring instruments at a predetermined tolerance for manufacturing [6, 7, 8]. The main branch, which have to improve the measurement process. For assess the capabilities of measurement – Determining the common precision R&R by dispersion analy sis (ANOVA method).