1. Which of the following statements are TRUE? a) The metabolic rate depends mainly on age...

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1. Which of the following statements are TRUE? a) The metabolic rate depends mainly on age of the human being b) The metabolic rate depends mainly on the activity level of the human being c) The metabolic rate depends mainly on the sex of the human being d) All of the above 2. Which of the following statements are TRUE? a) To maintain thermal comfort, the DBT of air should be increased as its moisture content increases b) To maintain thermal comfort, the DBT of air should be decreased as air velocity increases c) To maintain thermal comfort, the DBT of air should be increased as the temperature of the surrounding surfaces decrease d) All of the above 3. From ASHRAE comfort chart it is observed that: a) Lower dry bulb temperatures and higher moisture content are recommended for winter b) Lower dry bulb temperatures and lower moisture content are recommended for winter c) Lower dry bulb temperatures and higher moisture content are recommended for summer d) Higher dry bulb temperatures and higher moisture content are recommended for summer 4. Which of the following statements are TRUE? a) The air conditioning load on a building increases, if 0.4% design value is used for outside conditions instead of 1.0% value for summer b) The air conditioning load on a building decreases, if 0.4% design value is used for outside conditions instead of 1.0% value for summer c) For winter air conditioning, a conservative approach is to select 99.6% value for the outside design conditions instead of 99% value d) For winter air conditioning, a conservative approach is to select 99% value for the outside design conditions instead of 99.6% value 1. Which of the following statements are TRUE? a) The function of a thermal distribution system is to transfer sensible and latent heat between the air conditioning plant and the conditioned space b) A thermal distribution system may also supply the required amount of fresh air to the conditioned space c) Only air flows through a thermal distribution system d) Air, water, refrigerant or any other fluid can flow through a thermal distribution system 2. Which of the following statements are TRUE? a) A single zone, single duct, constant volume system can be used either for cooling or for heating, but not for both cooling and heating simultaneously b) The cooling capacity of a single zone, single duct, constant volume system is controlled by controlling the supply air temperature c) Single zone, single duct, constant volume systems are not suitable when the space conditions have to be controlled precisely d) Single zone, single duct, constant volume systems can be used for large single rooms only 3. Which of the following statements are TRUE? a) Single duct, multiple zone, constant volume systems can be used for simultaneous cooling and heating applications b) Single duct, multiple zone, constant volume systems can be used for large buildings comprising of several offices c) Single duct, multiple zone, constant volume systems are energy efficient d) Single duct, multiple zone, constant volume systems always ensure proper ventilation 4. Which of the following statements are TRUE? a) In single duct, variable air volume systems, the temperature of the supply air remains constant, but the supply air flow rate is varied depending upon the load b) Variable air volume systems generally consume less power compared to constant volume systems c) Variable air volume systems occupy less space compared to constant volume systems d) Variable air volume systems always ensure adequate ventilation and good room air distribution 5. Which of the following statements are TRUE? a) Dual duct systems can provide simultaneous cooling and heating b) Dual duct systems are constant air volume systems c) Dual duct systems are energy efficient d) Dual duct systems occupy more space compared to single duct systems 6. Which of the following statements are TRUE? a) In all air systems, the outdoor and re-circulated airflow rates are controlled independently b) In all air systems, it is sometimes possible to switch of the cooling coil and use only outdoor air for air conditioning c) All air systems are highly suitable for retrofitting applications d) All air systems generally ensure precise control of conditioned space 7. Which of the following statements are TRUE? a) A two-pipe all water system can be used for simultaneous cooling and heating applications b) In all water systems, separate provision must be made for ventilation c) An all water system is easier to maintain compared to an all air system d) Precise control of room conditions is difficult using all water systems 8. Which of the following statements are TRUE? a) All water systems are suitable in buildings requiring individual room control b) All water systems consume less space compared to all air systems c) All water systems offer lower initial and running costs d) All of the above 9. Which of the following statements are TRUE? a) An air-water system uses both air and water in the thermal distribution system b) In an air-water system, all the latent load on the building is handled by the primary air only c) In an air-water system, the cooling coil kept in the conditioned space operates under dry conditions d) Compared to all water systems, an air-water system is difficult to maintain 10. Which of the following statements are TRUE? a) Individual zone control is not possible in an air-water system b) Using an air-water system it is possible to ensure positive ventilation under all conditions c) Compared to all air and all water systems, the control of an air-water system is more complicated d) The initial cost of an air-water system could be higher compared to other systems 11. Which of the following statements are TRUE? a) A fan coil unit is used with all water systems only b) A fan coil unit can be used either with an all water system or with an air-water system c) It is possible to control the cooling capacity by controlling either liquid flow rate or air flow rate in a fan coil unit d) A fan coil unit used in an all water system requires a provision for draining the condensed water 12. Which of the following statements are TRUE? a) Compared to central systems, the initial cost of a unitary system is less b) Unitary systems can be installed quickly and their operation is relatively simple c) Unitary systems consume less power compared to central systems of same capacity d) Unitary systems are ideal for retrofitting applications 1. Which of the following statements are TRUE? a) The metabolic rate depends mainly on age of the human being b) The metabolic rate depends mainly on the activity level of the human being c) The metabolic rate depends mainly on the sex of the human being d) All of the above 2. Which of the following statements are TRUE? a) To maintain thermal comfort, the DBT of air should be increased as its moisture content increases b) To maintain thermal comfort, the DBT of air should be decreased as air velocity increases c) To maintain thermal comfort, the DBT of air should be increased as the temperature of the surrounding surfaces decrease d) All of the above 3. From ASHRAE comfort chart it is observed that: a) Lower dry bulb temperatures and higher moisture content are recommended for winter b) Lower dry bulb temperatures and lower moisture content are recommended for winter c) Lower dry bulb temperatures and higher moisture content are recommended for summer d) Higher dry bulb temperatures and higher moisture content are recommended for summer 4. Which of the following statements are TRUE? a) The air conditioning load on a building increases, if 0.4% design value is used for outside conditions instead of 1.0% value for summer b) The air conditioning load on a building decreases, if 0.4% design value is used for outside conditions instead of 1.0% value for summer c) For winter air conditioning, a conservative approach is to select 99.6% value for the outside design conditions instead of 99% value d) For winter air conditioning, a conservative approach is to select 99% value for the outside design conditions instead of 99.6% value 1. Which of the following statements are TRUE? a) The function of a thermal distribution system is to transfer sensible and latent heat between the air conditioning plant and the conditioned space b) A thermal distribution system may also supply the required amount of fresh air to the conditioned space c) Only air flows through a thermal distribution system d) Air, water, refrigerant or any other fluid can flow through a thermal distribution system 2. Which of the following statements are TRUE? a) A single zone, single duct, constant volume system can be used either for cooling or for heating, but not for both cooling and heating simultaneously b) The cooling capacity of a single zone, single duct, constant volume system is controlled by controlling the supply air temperature c) Single zone, single duct, constant volume systems are not suitable when the space conditions have to be controlled precisely d) Single zone, single duct, constant volume systems can be used for large single rooms only 3. Which of the following statements are TRUE? a) Single duct, multiple zone, constant volume systems can be used for simultaneous cooling and heating applications b) Single duct, multiple zone, constant volume systems can be used for large buildings comprising of several offices c) Single duct, multiple zone, constant volume systems are energy efficient d) Single duct, multiple zone, constant volume systems always ensure proper ventilation 4. Which of the following statements are TRUE? a) In single duct, variable air volume systems, the temperature of the supply air remains constant, but the supply air flow rate is varied depending upon the load b) Variable air volume systems generally consume less power compared to constant volume systems c) Variable air volume systems occupy less space compared to constant volume systems d) Variable air volume systems always ensure adequate ventilation and good room air distribution 5. Which of the following statements are TRUE? a) Dual duct systems can provide simultaneous cooling and heating b) Dual duct systems are constant air volume systems c) Dual duct systems are energy efficient d) Dual duct systems occupy more space compared to single duct systems 6. Which of the following statements are TRUE? a) In all air systems, the outdoor and re-circulated airflow rates are controlled independently b) In all air systems, it is sometimes possible to switch of the cooling coil and use only outdoor air for air conditioning c) All air systems are highly suitable for retrofitting applications d) All air systems generally ensure precise control of conditioned space 7. Which of the following statements are TRUE? a) A two-pipe all water system can be used for simultaneous cooling and heating applications b) In all water systems, separate provision must be made for ventilation c) An all water system is easier to maintain compared to an all air system d) Precise control of room conditions is difficult using all water systems 8. Which of the following statements are TRUE? a) All water systems are suitable in buildings requiring individual room control b) All water systems consume less space compared to all air systems c) All water systems offer lower initial and running costs d) All of the above 9. Which of the following statements are TRUE? a) An air-water system uses both air and water in the thermal distribution system b) In an air-water system, all the latent load on the building is handled by the primary air only c) In an air-water system, the cooling coil kept in the conditioned space operates under dry conditions d) Compared to all water systems, an air-water system is difficult to maintain 10. Which of the following statements are TRUE? a) Individual zone control is not possible in an air-water system b) Using an air-water system it is possible to ensure positive ventilation under all conditions c) Compared to all air and all water systems, the control of an air-water system is more complicated d) The initial cost of an air-water system could be higher compared to other systems 11. Which of the following statements are TRUE? a) A fan coil unit is used with all water systems only b) A fan coil unit can be used either with an all water system or with an air-water system c) It is possible to control the cooling capacity by controlling either liquid flow rate or air flow rate in a fan coil unit d) A fan coil unit used in an all water system requires a provision for draining the condensed water 12. Which of the following statements are TRUE? a) Compared to central systems, the initial cost of a unitary system is less b) Unitary systems can be installed quickly and their operation is relatively simple c) Unitary systems consume less power compared to central systems of same capacity d) Unitary systems are ideal for retrofitting applications

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