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Question 1:

Which of the following is a characteristic feature of digital thermometers?

A) Use of a liquid-filled bulb
B) Analog temperature display
C) Temperature readings in degrees Celsius only
D) Digital temperature display

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Explanation: The correct answer is D) Digital temperature display. One of the characteristic features of digital thermometers is the use of a digital display to provide temperature readings. Unlike traditional mercury or analog thermometers, digital thermometers present the temperature value in a numeric format.

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Question 2:

What type of sensor is commonly used in digital thermometers?

A) Mercury-filled sensor
B) Bimetallic strip sensor
C) Resistance temperature detector (RTD)
D) Liquid crystal display (LCD)

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Explanation: The correct answer is C) Resistance temperature detector (RTD). Digital thermometers often utilize a sensor known as a resistance temperature detector (RTD). RTDs rely on the principle that the electrical resistance of certain materials changes with temperature. The change in resistance is measured by the digital thermometer to determine the temperature.

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Question 3:

What is an advantage of digital thermometers over traditional mercury thermometers?

A) Faster response time
B) Higher temperature range
C) Greater accuracy
D) Lower cost

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Explanation: The correct answer is C) Greater accuracy. Digital thermometers generally offer greater accuracy compared to traditional mercury thermometers. The digital display provides a precise numeric value, eliminating the need to interpret readings from a mercury column. Additionally, digital thermometers can provide temperature readings with higher precision and resolution.

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Question 4:

What unit of temperature measurement is commonly used by digital thermometers?

A) Fahrenheit (°F)
B) Kelvin (K)
C) Rankine (°R)
D) Celsius (°C)

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Explanation: The correct answer is D) Celsius (°C). Digital thermometers commonly display temperature readings in degrees Celsius (°C). However, some digital thermometers may offer the option to switch between Celsius and Fahrenheit units for convenience or based on user preference.

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Question 5:

What is an additional feature that some digital thermometers may include?

A) Built-in clock and timer
B) Compass for outdoor temperature measurement
C) Humidity sensor
D) Wi-Fi connectivity

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Explanation: The correct answer is A) Built-in clock and timer. Some digital thermometers may incorporate additional features such as a built-in clock and timer. This allows the thermometer to function as a multifunctional device, enabling users to track time and set alarms or countdowns in addition to measuring temperature.