Prize-winning Quiz on Coal Chemical Engineering Knowledge 20
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1. The actual working cycle of a reciprocating compressor consists of four processes: compression, suction, discharge, and expansion. 2. What is the heat load of a heat exchanger? 3. The viscosity of a liquid increases as the temperature rises. 4. If the installation height of the centrifugal pump is too high, air entrapment will occur. 5. During the evaporation process, the solution must vaporize when heated. Reference answers: 1. Wrong; 3. Wrong; 4. Right; 5. Wrong. Answer for 2: In a heat exchanger, the amount of heat exchanged per unit time between the cold and hot fluids is determined by the requirements of the heat exchange process in production; that is, the heat exchange requirements imposed on the heat exchanger by the process are known as the heat load of the heat exchanger. This post was last edited by wbp on 2009-4-20 16:54.]
1. Wrong 2. The amount of heat exchanged by a hot fluid in a heat exchanger per unit time is called the heat load of the heat exchanger. 3. Wrong 4. Right 5. Wrong
1. The actual working cycle of a reciprocating compressor consists of four processes: compression, suction, discharge, and expansion. Error 2: The amount of heat exchanged between cold and hot fluids per unit time in a heat exchanger is known as the heat load of the heat exchanger. This concept arises from the requirements of heat exchange processes; it represents the heat exchange capacity that heat exchangers are expected to have in industrial applications. The heat load can be calculated based on the flow rates of materials, as well as the temperature and state changes at the inlet and outlet. 3. The viscosity of a liquid increases as the temperature rises. False. The viscosity of a liquid decreases as the temperature rises. 4. If a centrifugal pump is installed at too great a height, gas entrapment can occur. Yes. In the use of centrifugal pumps, when the pump body is above the liquid level in the tank and there is no excess above the pump’s suction height, it is very easy for air entrapment to occur, preventing the liquid from entering the pump. The factory refers to this phenomenon as failure to feed material. Adding a buffer tank at the inlet can solve this issue. 5. During the evaporation process, the solution must vaporize when heated. Wrong
1. Correct 2. The amount of heat exchanged between hot and cold fluids in a heat exchanger per unit time is known as the heat load of the heat exchanger. 3. Incorrect 4. Incorrect 5. Incorrect
1 Wrong 2 The amount of heat exchanged between hot and cold fluids per unit time in a heat exchanger is known as the heat load of the heat exchanger. 3 Wrong 4 Right 5 Wrong
1. The actual working cycle of a reciprocating compressor consists of four processes: compression, suction, discharge, and expansion. Error 2: The amount of heat exchanged between cold and hot fluids per unit time in a heat exchanger is known as the heat load of the heat exchanger. This concept arises from the requirements of heat exchange processes; it represents the heat exchange capacity that heat exchangers are expected to have in industrial applications. The heat load can be calculated based on the flow rates of materials, as well as the temperature and state changes at the inlet and outlet. 3. The viscosity of a liquid increases as the temperature rises. False. The viscosity of a liquid decreases as the temperature rises. 4. If a centrifugal pump is installed at too great a height, gas entrapment can occur. Yes. In the use of centrifugal pumps, when the pump body is above the liquid level in the tank and there is no excess above the pump’s suction height, it is very easy for air entrapment to occur, preventing the liquid from entering the pump. The factory refers to this phenomenon as failure to feed material. Adding a buffer tank at the inlet can solve this issue. 5. During the evaporation process, the solution must vaporize when heated. Wrong
1.X 2. The amount of heat exchanged by a hot fluid in a heat exchanger per unit of time is known as the heat load of the heat exchanger. 3.X 4.V 5.X
1. Wrong 2. The amount of heat exchanged between hot and cold fluids per unit time in a heat exchanger is called the heat load of the heat exchanger. 3. Wrong 4. Right 5. Wrong
1. The actual working cycle of a reciprocating compressor consists of four processes: compression, suction, discharge, and expansion. Error 2: The amount of heat exchanged between cold and hot fluids per unit time in a heat exchanger is known as the heat load of the heat exchanger. This concept arises from the requirements of heat exchange processes; it represents the heat exchange capacity that heat exchangers are expected to have in industrial applications. The heat load can be calculated based on the flow rates of materials, as well as the temperature and state changes at the inlet and outlet. 3. The viscosity of a liquid increases as the temperature rises. False. The viscosity of a liquid decreases as the temperature rises. 4. If a centrifugal pump is installed at too great a height, gas entrapment can occur. Yes. In the use of centrifugal pumps, when the pump body is above the liquid level in the tank and there is no excess above the pump’s suction height, it is very easy for air entrapment to occur, preventing the liquid from entering the pump. The factory refers to this phenomenon as failure to feed material. Adding a buffer tank at the inlet can solve this issue. 5. During the evaporation process, the solution must vaporize when heated. Wrong
1 Wrong 2 The amount of heat exchanged between hot and cold fluids per unit time in a heat exchanger is known as the heat load of the heat exchanger. 3 Wrong 4 Right 5 Wrong
1. The actual working cycle of a reciprocating compressor consists of four processes: compression, suction, discharge, and expansion. Wrong. 2. What is the heat load of a heat exchanger? The amount of heat exchanged between cold and hot fluids in a heat exchanger per unit of time is known as the heat load of the heat exchanger. This concept arises from the requirements of heat exchange tasks, representing the heat transfer capacity that heat exchangers are expected to have in industrial applications. The heat load can be calculated based on the flow rates of materials, as well as the temperature and state changes at the inlet and outlet. 3. The viscosity of a liquid increases as the temperature rises. Wrong. 4. If the installation height of the centrifugal pump is too high, air locking will occur. Yes. 5. During the evaporation process, the solution must vaporize when heated. Wrong.
1 Wrong 2 The amount of heat exchanged between hot and cold fluids per unit time in a heat exchanger is known as the heat load of the heat exchanger. 3 Wrong 4 Right 5 Wrong
1. The actual working cycle of a reciprocating compressor consists of four processes: compression, suction, discharge, and expansion. Wrong. 2. The amount of heat exchanged between cold and hot fluids per unit time in a heat exchanger is called the heat load of the heat exchanger. 3. The viscosity of liquids increases as temperature rises – this is wrong; in fact, the viscosity of liquids decreases as temperature rises. 4. If a centrifugal pump is installed at too great a height, gas entrapment can occur. Yes. In the use of centrifugal pumps, when the pump body is above the liquid level in the tank and there is no excess above the pump’s suction height, it is very easy for air entrapment to occur, preventing the liquid from entering the pump. The factory refers to this phenomenon as failure to feed material. Adding a buffer tank at the inlet can solve this issue. 5. During the evaporation process, the solution must vaporize when heated. Wrong