Heating and humidification is done in A. summer air conditioning B. winter air conditioning C. both of the mentioned D. none of the mentioned

Heating and humidification is done in A. summer air conditioning B. winter air conditioning C. both of the mentioned D. none of the mentioned  
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ANSWER  : B
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The horizontal line in psychrometric chart joining the change of state of air represents A. humidification B. sensible cooling or heating C. sensible cooling or heating with humidification D. sensible cooling or heating with dehumidification

Description : The horizontal line in psychrometric chart joining the change of state of air represents A. humidification B. sensible cooling or heating C. sensible cooling or heating with humidification D. sensible cooling or heating with dehumidification

Last Answer : ANSWER : B

When, H1 = Total heat of air entering the coil (heating or cooling) H2 = Total heat of air leaving the coil (heating or cooling) H3 = Total heat of air at the end of the process (humidification or dehumidification) then, the sensible heat factor (H2 – H1) / (H3 – H1) represents the process of A. cooling and humidification B. cooling and dehumidification C. heating and humidification D. heating and dehumidification

Description : When, H1 = Total heat of air entering the coil (heating or cooling) H2 = Total heat of air leaving the coil (heating or cooling) H3 = Total heat of air at the end of ... A. cooling and humidification B. cooling and dehumidification C. heating and humidification D. heating and dehumidification

Last Answer : ANSWER : C

Cooling and dehumidification of air is done in summer air conditioning. A. true B. false

Description : Cooling and dehumidification of air is done in summer air conditioning. A. true B. false

Last Answer : ANSWER : A

In sensible heating or cooling, A. work done remains constant B. dry bulb temperature or air remains constant C. both of the mentioned D. none of the mentioned

Description : In sensible heating or cooling, A. work done remains constant B. dry bulb temperature or air remains constant C. both of the mentioned D. none of the mentioned

Last Answer : ANSWER : A

Humidification is the process of addition moisture in air at A. constant wet bulb temperature B. constant dry bulb temperature C. constant latent heat D. none of the above

Description : Humidification is the process of addition moisture in air at A. constant wet bulb temperature B. constant dry bulb temperature C. constant latent heat D. none of the above

Last Answer : ANSWER : B

The temperature at which the air cannot hold all the water vapour mixed in it and some vapour starts condensing is called as A. humidification temperature B. dehumidification temperature C. dew point temperature D. none of the above

Description : The temperature at which the air cannot hold all the water vapour mixed in it and some vapour starts condensing is called as A. humidification temperature B. dehumidification temperature C. dew point temperature D. none of the above

Last Answer : ANSWER : C

Air refrigeration cycle is used in (a) domestic refrigerators (b) commercial refrigerators (c) air conditioning (d) gas liquefaction

Description : Air refrigeration cycle is used in (a) domestic refrigerators (b) commercial refrigerators (c) air conditioning (d) gas liquefaction

Last Answer : Ans: d

Which of the following processes is followed by unsaturated air (with dry bulb temperature 12°C and relative humidity 47%) passing through water spray washer (temperature of water being constant at 40°C? (A) Humidification only (B) Heating only (C) Both heating and humidification (D) Evaporative cooling

Description : Which of the following processes is followed by unsaturated air (with dry bulb temperature 12°C and relative humidity 47%) passing through water spray washer (temperature of water being constant at 40°C ... (B) Heating only (C) Both heating and humidification (D) Evaporative cooling

Last Answer : (C) Both heating and humidification

Glycerine is not used in the (A) Manufacture of explosive (B) Conditioning and humidification of tobacco (C) Manufacture of pharmaceuticals (D) None of these

Description : Glycerine is not used in the (A) Manufacture of explosive (B) Conditioning and humidification of tobacco (C) Manufacture of pharmaceuticals (D) None of these

Last Answer : (D) None of these

Dew point can be best defined as the: a. Absolute temperature at which air, upon heating, will evaporate moisture b. . Percentage of moisture that air can hold at a given temperature and pressure c. . Temperature that air will begin to evaporate moisture d. . Temperature at which air, upon cooling, becomes saturated, causing moisture to condense should the temperature drop further e. . Atmospheric pressure at which air will condense moisture

Description : Dew point can be best defined as the: a. Absolute temperature at which air, upon heating, will evaporate moisture b. . Percentage of moisture that air can hold at a given temperature ... to condense should the temperature drop further e. . Atmospheric pressure at which air will condense moisture

Last Answer : Answer: D

The output of a diesel engine can be increased without increasing the engine speed or size in the following way A. feeding more fuel B. increasing the flywheel size C. heating intake air D. supercharging

Description : The output of a diesel engine can be increased without increasing the engine speed or size in the following way A. feeding more fuel B. increasing the flywheel size C. heating intake air D. supercharging

Last Answer : ANSWER : D

The heating value per unit volume of hydrogen gas is less than ______________ that of air. a) 1/12th b) 1/10th c) 2/3rd d) 1/3rd

Description : The heating value per unit volume of hydrogen gas is less than ______________ that of air. a) 1/12th b) 1/10th c) 2/3rd d) 1/3rd

Last Answer : Answer: d Explanation: None

Which one of the following methods can be adopted to obtain isothermal compression in an air compressor? A. Increasing the weight of the compressor B. Inter-stage heating C. Atmospheric cooling D. Providing appropriate dimensions to the cylinder

Description : Which one of the following methods can be adopted to obtain isothermal compression in an air compressor? A. Increasing the weight of the compressor B. Inter-stage heating C. Atmospheric cooling D. Providing appropriate dimensions to the cylinder

Last Answer : ANSWER : A

When air passes through silica gel, A. it absorbs water vapour molecules B. latent heat of condensation is released C.dbt of air increases D. all of the mentioned

Description : When air passes through silica gel, A. it absorbs water vapour molecules B. latent heat of condensation is released C.dbt of air increases D. all of the mentioned

Last Answer : ANSWER : D

Air can be cooled and dehumidified by A. circulating chilled water in tube across air flow B. placing evaporator coil across air flow C. spraying chilled water to air D. all of the mentioned

Description : Air can be cooled and dehumidified by A. circulating chilled water in tube across air flow B. placing evaporator coil across air flow C. spraying chilled water to air D. all of the mentioned

Last Answer : ANSWER : D

When humidity ratio of air ____ air is said to be dehumidified. A. increases B. decreases C. remains constant D. none of the mentioned

Description : When humidity ratio of air ____ air is said to be dehumidified. A. increases B. decreases C. remains constant D. none of the mentioned

Last Answer : ANSWER : B

Solid injection is also called ________________ a) air injection b) mechanical injection c) compression fuel injection d) none of the mentioned

Description : Solid injection is also called ________________ a) air injection b) mechanical injection c) compression fuel injection d) none of the mentioned

Last Answer : Answer: b Explanation: Generally, solid injection is also called mechanical injection.

Removal of air from the pipeline is termed as ____________ in injection system. a) bleeding b) wound c) sweating d) none of the mentioned

Description : Removal of air from the pipeline is termed as ____________ in injection system. a) bleeding b) wound c) sweating d) none of the mentioned

Last Answer : Answer: a Explanation: Generally, the removal of air from the pipeline is termed as bleeding in injection system.

The methods used on fuel injection are : a) air injection b) mechanical injection c) solid fuel injection d) all of the mentioned

Description : The methods used on fuel injection are : a) air injection b) mechanical injection c) solid fuel injection d) all of the mentioned

Last Answer : Answer: d Explanation: The methods used on fuel injection are air injection, mechanical injection and solid fuel injection.

Steam produced in a boiler can be used for a variety of purposes including space heating, drying and _________________ a. Sterilization b. Humidification c. Power generation d. All of above

Description : Steam produced in a boiler can be used for a variety of purposes including space heating, drying and _________________ a. Sterilization b. Humidification c. Power generation d. All of above

Last Answer : d. All of above

Cooling towers are rated in terms of A. approach B. range C. both of the mentioned D. none of the mentioned

Description : Cooling towers are rated in terms of A. approach B. range C. both of the mentioned D. none of the mentioned

Last Answer : ANSWER :C

Which of the following is an absorbent? A.silica gel B. activated alumina C. both of the mentioned D. none of the mentioned

Description : Which of the following is an absorbent? A.silica gel B. activated alumina C. both of the mentioned D. none of the mentioned

Last Answer : ANSWER : C

In a refrigeration cycle, the super heating……..C.O.P (a)decreases (b)does not change (c) increases (d)none of the above

Description : In a refrigeration cycle, the super heating……..C.O.P (a)decreases (b)does not change (c) increases (d)none of the above

Last Answer : Ans: a

An important characteristic of absorption system of refrigeration is (a) noisy operation (b) quiet operation (c) very little power consumption (d) its input only in the form of heating.

Description : An important characteristic of absorption system of refrigeration is (a) noisy operation (b) quiet operation (c) very little power consumption (d) its input only in the form of heating.

Last Answer : Ans: D

By higher octane number of SI fuel, it is meant that the fuel has (a) Higher heating value (b) Higher flash point (c) Lower volatility (d) Longer ignition delay

Description : By higher octane number of SI fuel, it is meant that the fuel has (a) Higher heating value (b) Higher flash point (c) Lower volatility (d) Longer ignition delay

Last Answer : Ans : d

All heat engines utilize a. lower heating value of oil b. higher heating value of oil c. net calorific value of oil d. calorific value of fuel

Description : All heat engines utilize a. lower heating value of oil b. higher heating value of oil c. net calorific value of oil d. calorific value of fuel

Last Answer : ANSWER a. lower heating value of oil

Draw a neat sketch of regenerative feed heating.

Description : Draw a neat sketch of regenerative feed heating.

Last Answer : Regenerative Feed Heating  

Intercooling in multistage compression is done A. To cool the air during compression B. To cool the air at delivery C. To enable compression in two stages D. To minimize the work of compression

Description : Intercooling in multistage compression is done A. To cool the air during compression B. To cool the air at delivery C. To enable compression in two stages D. To minimize the work of compression

Last Answer : ANSWER : D

In a single stage reciprocating air compressor, the work done on air to compressor is from suction pressure to delivery pressure will be minimum when the compression is A. Isothermal process B. Adiabatic process C. Polytropic process D. Constant pressure process.

Description : In a single stage reciprocating air compressor, the work done on air to compressor is from suction pressure to delivery pressure will be minimum when the compression is A. Isothermal process B. Adiabatic process C. Polytropic process D. Constant pressure process.

Last Answer : ANSWER : A

Is there a window unit that has both heating and air conditioning?

Description : Is there a window unit that has both heating and air conditioning?

Last Answer : Yes. There are units that fit in the window that provide both heat and cooling. There are some great looking heater/AC units on the market that would fit your needs perfectly.

Heat pump (A) Accomplishes only space heating in winter (B) Accomplishes only space cooling in summer (C) Accomplishes both (A) and (B) (D) Works on Carnot cycle

Description : Heat pump (A) Accomplishes only space heating in winter (B) Accomplishes only space cooling in summer (C) Accomplishes both (A) and (B) (D) Works on Carnot cycle

Last Answer : (C) Accomplishes both (A) and (B)

In adiabatic evaporative cooling, heat transfer between chamber and surroundings is ____ A. zero B. high C. low D. none of the mentioned

Description : In adiabatic evaporative cooling, heat transfer between chamber and surroundings is ____ A. zero B. high C. low D. none of the mentioned

Last Answer : ANSWER : A

Which of the following statement is true? A. the chart is plotted for pressure equal to 760mm Hg B. the constant wbt line represents adiabatic saturation process C. the constant wbt line coincides with constant enthalpy line D. all of the mentioned

Description : Which of the following statement is true? A. the chart is plotted for pressure equal to 760mm Hg B. the constant wbt line represents adiabatic saturation process C. the constant wbt line coincides with constant enthalpy line D. all of the mentioned

Last Answer : ANSWER : D

Alcohols alone cannot be used in CI engines as a) their self ignition temperature is high b) latent heat of vaporization is high c) all of the mentioned d) none of the mentioned

Description : Alcohols alone cannot be used in CI engines as a) their self ignition temperature is high b) latent heat of vaporization is high c) all of the mentioned d) none of the mentioned

Last Answer : Answer: c Explanation: None.

If one or more nozzles are not spraying correctly then ________________ occurs. a) dripping b) misfiring c) cold firing d) none of the mentioned

Description : If one or more nozzles are not spraying correctly then ________________ occurs. a) dripping b) misfiring c) cold firing d) none of the mentioned

Last Answer : Answer: b Explanation: If one or more nozzles are not spraying correctly then misfiring occurs and not cold firing.

The usual types of diesel injectors are : a) single hole injector b) multi hole injector c) long stem injector d) all of the mentioned

Description : The usual types of diesel injectors are : a) single hole injector b) multi hole injector c) long stem injector d) all of the mentioned

Last Answer : Answer: d Explanation: The types of diesel injectors are single hole injector, multi hole injector and long stem injector.

In electronic fuel injection, there is improvement in the _____________ efficiency due to comparatively less resistance in the intake manifolds which will cause less pressure losses. a) mechanical b) volumetric c) overall d) none of the mentioned

Description : In electronic fuel injection, there is improvement in the _____________ efficiency due to comparatively less resistance in the intake manifolds which will cause less pressure losses. a) mechanical b) volumetric c) overall d) none of the mentioned

Last Answer : Answer: b Explanation: In electronic fuel injection, there is improvement only in the volumetric efficiency due to comparatively less resistance in the intake manifolds which will cause less pressure losses and no other efficiencies are hindered.

Kitchen Services is a licensed air conditioning, heating and ventilation contractor in Los Angeles, California. We specialize in Kitchen Exhaust Systems Installations, Preventive Maintenance and Repairs?

Description : Kitchen Services is a licensed air conditioning, heating and ventilation contractor in Los Angeles, California. We specialize in Kitchen Exhaust Systems Installations, Preventive Maintenance and Repairs?

Last Answer : We provide professional air conditioning, refrigeration and kitchen hood cleaning services in Beverly Hills, Santa Monica and Los Angeles. We install new air conditioning, heating and ventilation ... We install refrigeration equipment including walk-in coolers, walk-in freezers and ice machines.

Heating and Air Conditioning Technician ?

Description : Heating and Air Conditioning Technician ?

Last Answer : form_title= Heating and Air Conditioning Technician form_header= Hire a heating and AC technician. Please describe the problem in detail.*= _ [50] How old is your home?*= _ [50] When was the unit last serviced?*= _ [50]

What company is best at heating and air conditioning repair?

Description : What company is best at heating and air conditioning repair?

Last Answer : There are many heating and air conditioning companies, and to find the best, you will want to ask your friends and family what they would recommend. They have bought heaters and air conditioners, so they know what the best is.

Where is the best place in atlanta to find information about heating and air conditioning?

Description : Where is the best place in atlanta to find information about heating and air conditioning?

Last Answer : There is a statewide known company in the state of Georgia that offers many different locations. It is actually called Georgia Heating and Air Conditioning.

Where can i find a list of heating and air conditioning contractors in USA?

Description : Where can i find a list of heating and air conditioning contractors in USA?

Last Answer : Air Conditioning Contractors of America would be the place to start to find a list of heating and air conditioning contractors in your area. It is a large non-profit organization with extensive information and help for people looking for contractors.

How much does a heating and central air conditioning system, when you start from scratch?

Description : How much does a heating and central air conditioning system, when you start from scratch?

Last Answer : From what I know they are cheap to purchase, but you need to take into account you will be paying for them on a monthly basis. Which means if you run your air all the time you will be ... run out air in California straight during the summer it's pretty pricey, but this is also California pricing.

HVAC stands for __________. A) heating, ventilation, air conditioning B) height, velocity ,area C) all of the above. D) None of the above.

Description : . HVAC stands for __________. A) heating, ventilation, air conditioning B) height, velocity ,area C) all of the above. D) None of the above.

Last Answer : heating, ventilation, air conditioning

Do you know anyone who loves the warm summer months who doesn't have air conditioning?

Description : Do you know anyone who loves the warm summer months who doesn't have air conditioning?

Last Answer : answer:My adoptive grandmother. She lives in a house in the country that doesn’t have air conditioning. She is 83 years old and she has been living there her entire life. She loves the summer. she is absolutely ridiculous.

Is it cheaper to run window fans or use air conditioning in the summer months?

Description : Is it cheaper to run window fans or use air conditioning in the summer months?

Last Answer : Window fans are cheaper to run electricity wise in the summer. Air conditioning will cost more but it's much more effective if it's really hot.

The dew point temperature is less than the wet bulb temperature for A. saturated air B. unsaturated air C. both saturated and unsaturated air D. none of the above

Description : The dew point temperature is less than the wet bulb temperature for A. saturated air B. unsaturated air C. both saturated and unsaturated air D. none of the above

Last Answer : ANSWER : B

A Mixture of dry air and water,the formation of fog starts when, A. air temperature is equal to the dew point temperature B. air temperature is greater than the dew point temperature C. both a. and b. D. none of the above

Description : A Mixture of dry air and water,the formation of fog starts when, A. air temperature is equal to the dew point temperature B. air temperature is greater than the dew point temperature C. both a. and b. D. none of the above

Last Answer : ANSWER : A

What is sensible cooling of air? A. the cooling in which sensible heat of air is removed in order to reduce temperature B. the cooling in which temperature of air is reduced without changing in its moisture content C. both a. and b. D. none of the above

Description : What is sensible cooling of air? A. the cooling in which sensible heat of air is removed in order to reduce temperature B. the cooling in which temperature of air is reduced without changing in its moisture content C. both a. and b. D. none of the above

Last Answer : ANSWER : C