Question : The temperature of boiling water in a steam engine may be high because:
Option 1: there are dissolved substances in water
Option 2: there is low pressure inside the boiler
Option 3: there is high pressure inside the boiler
Option 4: the fire is at very high temperature
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Correct Answer: there is high pressure inside the boiler
Solution : The correct option is there is high pressure inside the boiler.
Due to the high pressure inside the boiler in a steam engine, boiling water has a high temperature. High pressure allows water to reach higher temperatures before boiling. The engine's turbines or pistons are then propelled by this high-temperature, high-pressure steam, which produces mechanical work or electricity.
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Question : Why boiling point of water decrease at high altitudes?
Option 1: Because of the high temperature
Option 2: Because of low atmospheric pressure
Option 3: Because of low temperature
Option 4: Because of high atmospheric pressure
Question : The boiling point of water decreases at higher altitudes due to:
Option 1: low temperature
Option 2: low atmospheric pressure
Option 3: high temperature
Option 4: high atmospheric pressure
Question : Phosphorus is kept in water because
Option 1: Its ignition temperature is very high.
Option 2: Its ignition temperature is very low.
Option 3: Its critical temperature is high.
Option 4: Its critical temperature is low.
Question : Burns caused by steam are much severe than those caused by boiling water because
Option 1: Steam pierces through the pores of body quickly
Option 2: Steam has latent heat
Option 3: Steam is gas and engulfs the body quickly
Option 4: Temperature of steam is higher
Question : Which of the following pressure belt is known as the horse latitude?
Option 1: Sub - Polar Low Pressure
Option 2: Equatorial Low Pressure
Option 3: Sub - Tropical High Pressure
Option 4: High Pressure
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