Temperature and Its Measurement

What type of modern temperature sensor is used in non-contact infrared thermometers to measure fever from a distance?

1. A liquid mercury bulb
2. An optical lens that detects infrared thermal radiation emitted by the body
3. A bimetallic strip made of iron and copper
4. A boiling water sensor

If an object has a temperature of 50°C, what will its temperature value be on the Kelvin scale?

1. 50 K
2. 223 K
3. 323 K
4. 0 K

Which of the following is a vital safety rule to follow when cleaning a glass clinical thermometer?

1. Wash it thoroughly under boiling hot water
2. Wash it with cold water mixed with an antiseptic solution
3. Burn it over an open candle flame to destroy germs
4. Clean it using a rough steel wire brush

Why are laboratory thermometers typically filled with red or green colored alcohol instead of clear alcohol?

1. To make the alcohol react faster with chemicals
2. To increase the boiling point of the alcohol
3. To make the moving liquid column clearly visible against the glass scale
4. To prevent the alcohol from evaporating into gas

At what numerical temperature do both the Celsius scale and the Fahrenheit scale show the exact same reading?

1. 0
2. 100
3. -40
4. 32

What specific type of thermometer is used by meteorologists to record the highest and lowest temperatures of a day for weather reports?

1. Clinical thermometer
2. Maximum-Minimum thermometer
3. Electronic laboratory thermistor
4. Laboratory glass thermometer

Which of the following represents the correct formula to convert a Kelvin temperature (K) into Celsius (C)?

1. C = K + 273
2. C = K - 273
3. C = K x 9/5
4. C = K/100

Before using a clinical mercury thermometer on a new patient, a nurse shakes it sharply a few times. What is the reason for this action?

1. To mix the mercury thoroughly with the glass material
2. To force the mercury column back down below the 35°C mark
3. To generate friction heat inside the bulb
4. To test if the outer glass shell is strong enough

What type of thermometer is engineered with two different metal strips bonded together that bend when temperature changes?

1. Digital thermometer
2. Clinical mercury thermometer
3. Bimetallic strip thermometer
4. Laboratory alcohol thermometer

Why is water NOT an appropriate liquid for use inside standard thermometers?

1. It is transparent and has an uneven, non-uniform rate of thermal expansion
2. It is too expensive to source for factories
3. It never expands when heated by thermal energy
4. It stays liquid up to a temperature of 500°C

What is the correct value of absolute zero on the Celsius scale?

1. 0°C
2. -273.15°C
3. 100°C
4. -100°C

Which of the following properties of matter forms the baseline principle behind the working of liquid-in-glass thermometers?

1. Matter changes its chemical composition when cooled
2. Most substances expand when heated and contract when cooled
3. Liquids always boil instantly when exposed to glass surfaces
4. Materials become completely magnetic when temperature increases

What temperature on the Fahrenheit scale corresponds to the freezing point of water?

1. 0°F
2. 32°F
3. 100°F
4. 212°F

Why is a digital thermometer widely considered safer than a traditional mercury-in-glass thermometer?

1. It uses colorful plastic and looks like a toy
2. It does not contain toxic mercury, which can harm health if the glass breaks
3. It can double as an electronic calculator
4. It never requires any battery power to operate

What is the normal measurement range of a standard glass clinical thermometer?

1. -10°C to 110°C
2. 35°C to 42°C
3. 0°C to 100°C
4. 98°C to 212°C

Which of the following is the correct mathematical formula to convert temperature from Celsius (C) to Fahrenheit (F)?

1. F = (C x 2) + 100
2. F = (C x 9/5) + 32
3. F = C - 273
4. F = C/100

What is the boiling point of pure water on the Fahrenheit scale under standard conditions?

1. 100°F
2. 0°F
3. 212°F
4. 32°F

Why can a standard laboratory thermometer NOT be used effectively to measure human body temperature in a clinic?

1. It does not contain any markings or graduation scales
2. It lacks a kink, causing its liquid level to drop rapidly as soon as it is removed from the body
3. It can only measure temperatures below the freezing point of water
4. It is made of soft rubber instead of glass

What is the function of the sharp twist or restriction called a 'kink' in a glass clinical thermometer?

1. To make the thermometer look more attractive
2. To stop the mercury from expanding when heated
3. To prevent the mercury level from falling down immediately after removal from the patient's mouth
4. To make the glass tube break easily

Which liquid is commonly preferred in traditional clinical thermometers because it expands uniformly and does not stick to glass?

1. Water
2. Mustard oil
3. Mercury
4. Liquid milk

What is the normal core temperature of a healthy human body on the Celsius scale?

1. 98.6°C
2. 37°C
3. 50°C
4. 0°C

At what temperature does pure water freeze into ice under standard atmospheric pressure on the Celsius scale?

1. 100°C
2. 0°C
3. 32°C
4. -10°C

What is the standard SI unit of temperature used by scientists worldwide?

1. Degree Celsius (°C)
2. Degree Fahrenheit (°F)
3. Kelvin (K)
4. Calorie

Which of the following instruments is universally used to measure temperature accurately?

1. Barometer
2. Anemometer
3. Thermometer
4. Odometer

What does temperature fundamentally measure?

1. The total weight of an object
2. The degree of hotness or coldness of an object
3. The amount of sound an object produces
4. The total volume occupied by a substance