Basic Knowledge on Calibration of Testing Equipment

Specifically, the objectives of calibration are: to check the __________ of the instrument and; to determine the __________ of the instrument.

• precision and traceability

• accuracy and traceability

• accuracy and derivability

• mastery and accountability

The following are the causes of the inaccuracy of laboratory testing equipment/apparatus EXCEPT:

• normal wear and tear

• extended use

• electric or mechanical shock

• capital

In general, calibration improves the accuracy of measuring device, thus, ___________.

• improve product quality

• reduce product quality

• earn product savings

• damage person's credibility

Pursuant to __________, laboratory testing equipment/apparatus shall be calibrated based on defined schedules and requirements for calibration to ensure the accuracy of test results obtained from testing equipment used in various DPWH infrastructure projects.

• DPWH Department Order No. 53, Series of 2019

• DPWH Department Order No. 126, Series of 2016

• DPWH Department Order No. 22, Series of 2018

• DPWH Department Order No. 253, Series of 2003

Calibration of laboratory testing equipment/apparatus shall be conducted on the following conditions EXCEPT:

• Never

• According to the recommendation of the Manufacturer

• Periodically

• After any mechanical or electric shock

When external calibrations are performed, service providers that demonstrate __________, __________, and ____________ shall be used.

• skills, measurement capacity, and derivability

• competence, measurement capability, and traceability

• traits, measurement precision and accountability

• competence, measurement accuracy and accountability

The tolerable error of calibrating the force-measuring instruments e.g. universal testing machine using a load cell is _______.

• ±0.5%

• ±1.5%

• ±1.0%

• ±2.0%

In calibrating balances or scales, the standard specification for laboratory weights and precision mass standards is based from:

• ASTM D616

• ASTM E617

• ASTM F618

• ASTM E616

The calibration of Rebound Hammer Apparatus shall be conducted every _________ using __________.

• 10,000 impact; anvil

• 20,000 impact; anvil

• 15,000 impact; anvil

• 25,000 impact; anvil

It is the adjustment or standardization of the accuracy of the measuring instrument/ equipment, usually by comparison with a certified reference or standard.

• Estimation

• Quantification

• Calibration

• Valuation