Description : Explain the factors affecting volumetric efficiency of reciprocating air compressor.
Last Answer : Factors affecting volumetric efficiency of reciprocating air compressor: 1) Clearance Volume 2) Restricted passage and leakage at inlet valves 3) Speed of rotation 4) Piston ring leakages ... wall, it get expanded, which decreases the charge taken in therefore volumetric efficiency decreases.
Description : Pick out the wrong statement pertaining to the cooling towers. (A) In case of induced draft cooling tower, the fan is placed at the top of the tower (B) Effectiveness of ... Effectiveness of a mechanical draft cooling tower is reduced with increase in air wet-bulb temperature
Last Answer : (D) Effectiveness of a mechanical draft cooling tower is reduced with increase in air wet-bulb temperature
Description : When the temperature and humidity of air is low, we usually use __________ draft cooling tower. (A) Natural (B) Forced (C) Induced (D) None of these
Last Answer : (A) Natural
Description : Use of natural draft cooling tower is practised, when the air has low (A) Humidity (B) Temperature (C) Both 'a' & 'b' (D) Neither 'a' nor 'b'
Last Answer : (C) Both 'a' & 'b
Description : The cooling effect in a cooling tower cannot be increased by (A) Increasing the air velocity over the wet surfaces (B) Reducing the humidity of entering air (C) Lowering the barometric pressure (D) None of these
Last Answer : (D) None of these
Description : The cooling effect in a cooling tower can be speeded up by (A) Increasing the air velocity and area of exposed wet surface (B) Reducing the barometric pressure (C) Reducing the humidity of the air (D) All (A), (B) and (C)
Last Answer : (D) All (A), (B) and (C)
Description : The term "cooling range" in a cooling tower refers to the difference in the temperature of (A) Cold water leaving the tower and the wet bulb temperature of the surrounding air (B) Hot water entering the ... air (C) Hot water entering the tower and the cooled water leaving the tower (D) None of these
Last Answer : (C) Hot water entering the tower and the cooled water leaving the tower
Description : The term "approach" in a cooling tower refers to the difference in the temperature of the (A) Cold water leaving the tower and the wet bulb temperature of the surrounding air (B ... (C) Hot water entering and the cooled water leaving the cooling tower (D) None of these
Last Answer : (A) Cold water leaving the tower and the wet bulb temperature of the surrounding air
Description : What come out from the the cooling tower of a nuclear power plant 1 smoke 2 cool air 3 hot air 4 none of theses
Last Answer : 1 smoke
Description : What is the max square feet or cubic feet for residential air conditioners?
Last Answer : JLeslie This Link seems to keep is simple and I like that it is tabled by temp zones.
Description : Why does my motorcycle sound different (almost like a loud fan or compressed air)
Last Answer : answer:A hissing sound would usually point to a vacuum leak. Vacuum leaks often happen when rubber hoses wear out and crack, or even gaskets for the air intake or manifold start to wear out and weaken. ... leak at the mating flange. Do you smell anything off about the bike when it's running?
Description : Explain construction and working of two stage reciprocating air compressors.
Last Answer : Figure: Two Stage Reciprocating air compressor Construction and Working : It consists of two cylinders (L.P. and H.P.) with water cooled intercooler and air receiver. First of all fresh air is ... (ie second stage) from 3 to 4 is delivered by the compressor at pressure P3 & Temp T4.
Description : State necessity of multistaging and Intercooling of air compressor.
Last Answer : Necessity of multistaging - For producing high pressure i.e. more than 8 bar, single stage air compressor suffers fallowing drawbacksi) Size of cylinder is too large ii) Rise ... also automatically decreased and volumetric efficiency is also decreases. To avoid this intercooling is necessary.
Description : Explain the sources of air leakage in condenser.
Last Answer : Sources of air leakage in condenser 1. Air leak through joints and packing. Air leaks into condenser as pressure inside falls below atmospheric pressure. 2. Air also comes in condenser with the steam. ... separated at low pressure in the condenser 4. Air leaks if any bypass seal is broken.
Description : Differentiate between : (i) Reciprocating and rotary air compressor (ii) Centrifugal and axial flow compressor
Last Answer : (i) Reciprocating and rotary air compressor: Sr. No. Reciprocating air compressor Rotary air compressor 1 It is having to and fro motion. It is having rotary ... I.C. engine and for refrigerants and industrial gases. Used universally with large gas turbine.
Description : Give classification of air compressor.
Last Answer : Give classification of air compressor.
Description : List down the uses of compressed air
Last Answer : Application of compressed air: 1. Operating tools in factories 2. Operating drills and hammers in road building 3. Starting diesel engines 4. Operating brakes on buses, trucks and trains 5. Spray painting 6. Excavating 7. To clean the large workshops Etc.
Description : Define free air delivered of compressor
Last Answer : Free Air Delivered (FAD): any two points It is the actual volume of air delivered by the compressor when reduced to NTP. FAD is a flow rate of air derived from measurement at the ... outlet of a compressor, converted back to the actual inlet (free air) conditions before it was compressed.
Description : How do Wire Rope Isolators (WRI) compare to elastomers regarding use over a broad temperature range?
Last Answer : The WRI can be used over a greater temperature range with less change in performance. Proper elastomer selection will make elastomers useful for most applications.
Description : During dehumidification of unsaturated air wet bulb temperature & partial pressure of vapor are not constant. However, during evaporative cooling process with recirculated water supply, the __________ remains ... pressure of water vapor (C) Relative humidity (D) None of these
Last Answer : (A) Wet bulb temperature
Description : Pick out the wrong statement (A) A horizontal line on the humidity chart indicates the temperature changes at constant molal humidity (B) When water is cooled from 80 to 70°C by exposure ... & air cannot be increased by either reducing the mixture temperature or by increasing the total pressure
Last Answer : (D) Relative saturation of unsaturated mixture of water vapor & air cannot be increased by either reducing the mixture temperature or by increasing the total pressure
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
Description : In a forced draft cooling tower, water is cooled from 95 to 80°F by exposure to air with a wet bulb temperature of 70°F. In this case, the (A) Range is 15°F (B) Approach is 10°F (C) Both (A) & (B) (D) Neither (A) nor (B)
Last Answer : (C) Both (A) & (B)
Description : Can a cooling tower cool water below the wet bulb temperature of inlet air? (A) Yes (B) No (C) Yes; but height of cooling tower will be prohibitively high (D) Yes; but the air flow rate should be excessively high
Last Answer : (B) No
Description : The temperature of water cooled in cooling tower is always __________ temperature of entering air. (A) More than the wet bulb (B) Less than the wet bulb (C) Equal to the wet bulb (D) Equal to the dry bulb
Last Answer : (A) More than the wet bulb
Description : The minimum temperature to which the water can be cooled in a cooling tower is the __________ temperature of air. (A) Ambient (B) Dry bulb (C) Dew point (D) Wet bulb
Last Answer : C) Dew point
Description : Minimum temperature upto which water can be theoretically cooled down in the cooling tower by evaporative cooling is equal to the __________ temperature of air. (A) Wet bulb (B) Dry bulb (C) Saturation (D) Dew point
Last Answer : Option A
Description : L/G ratio in a cooling tower is a ratio of _____. • Length and girth • Length and temperature gradient • Water flow rate and air mass flow rate • Air mass flow rate and water flow rate
Last Answer : Water flow rate and air mass flow rate
Description : A ______ is a specialized heat exchanger in which air and water are brought into direct contact with each otherin order to reduce the water's temperature. a. Cooling tower b. Heating tower c. Both d. All are wrong
Last Answer : cooling tower
Description : Which among the following are the components of natural draft cooling tower a) Supply basin b) reinforced concrete c) Hot water distribution d) none of the above
Last Answer : reinforced concrete
Description : In which system is Cooling of hot water is done on tray as step by? a) Mechanical draught cooling system b) Hyperbolic cooling tower c) Atmospheric cooling tower d) Wet cooling tower
Last Answer : Atmospheric cooling tower
Description : In which system is Cooling of hot water is done on tray as step by? a. Mechanical draught cooling system b. Hyperbolic cooling tower c. Atmospheric cooling tower d. Wet cooling tower
Description : . In which system is Cooling of hot water is done on tray as step by? a) Mechanical draught cooling system b) Hyperbolic cooling tower c) Atmospheric cooling tower d) Wet cooling tower
Description : Moist air is cooled along the line of constant __________ , when it is passed over a cold & dry cooling coil, such that no condensation occurs? (A) Enthalpy (B) Relative humidity (C) Wet bulb temperature (D) Dew point temperature
Last Answer : (D) Dew point temperature
Description : __________ remains constant during the adiabatic cooling of moist air. (A) Wet bulb temperature (B) Dry bulb temperature (C) Relative humidity (D) Specific humidity
Description : In natural draft cooling tower the air flow is obtained by___________ a) Difference in air pressure b) difference in air temperature c) Difference in air speed d) none of the above
Last Answer : Difference in air pressure
Description : The most important element of weather affecting agriculture in India is: (1) Temperature (2) Humidity (3) Wind (4) Rainfall
Last Answer : (4) Rainfall Explanation: Though temperature and humidity are one of the key elements of weather crucial for a good harvest, agriculture in India is said to be the handmaid of monsoon. This ... lack of irrigational facilities across the country. A good monsoonal year often means a bumper harvest.
Description : The most important seed component affecting seed /viability during storage is: a. Temperature b. Humidity c. Moisture d. Food reserves
Last Answer : Temperature
Description : What factors should be compared when evaluating cooling tower bids?
Last Answer : Examining the following factors should allow for a reasonable evaluation of cooling towers: 1) Purchased cost 2) Installed cost 3) Fan energy consumption 4) Pump energy consumption 5) ... maintenance costs 8) Worker safety requirements 9) Environmental safety 10) Expected service life
Description : State two factors on which efficiency of cooling tower depends.
Last Answer : Efficiency of cooling tower depends on 1.Losses in duct, piping and joints, pipes should be free from scale/rust 2.Efficient heat transfer, maintenance of piping , Ensure fill is clean and free of debris. 3.Sufficient airflow and correct fan speed.
Description : How is water vapor getting into this process plumbing?
Last Answer : answer:May not be an answer, but 10 psi is less than ambient. Was the leak test for a vacuum or for positive pressure? If it is a vacuum leak it would bring in moisture.
Description : In Drum type Boiler Feed water flow control by Three element controller a. Drum level b. Steam Flow c. Feed water flow d. All of above
Last Answer : Ans:- d. All of above
Description : For What Purpose Bedding Is Used Under Storm Water Drains, Explain?
Last Answer : Answer : Beddings are primarily made up of granular or concrete materials. They are primarily used for the following purposes: They are used to provide a more uniform support for the under ... sockets. Otherwise it can lead to uneven stress being induced on the pipes eventually damaging it.
Description : Please ripley me due to emergency
Last Answer : To calculate the flux density in the ring, you need to use the following formula: B = (μ * I * N) / (2 * π * r) where: B is the flux density in the ring (in teslas) μ is the relative permeability ... 2 * π * 0.127 m) = 0.53 T So the flux density in the ring would be approximately 0.53 teslas.
Description : Is not asked
Last Answer : In manual feed turning, the operator manually controls the feed rate of the cutting tool by turning a handwheel or other manual feed mechanism. This allows the operator to adjust the feed rate ... hand, is generally faster and more consistent, but it requires more complex equipment and programming.
Description : Can a Schizophrenic study Engineering?
Last Answer : You can ask the university’s disability counselor. You might get an accommodation as a special student or take fewer classes, and go part time. Congratulations on improving your situation.
Description : Mechanical engineers: how should one think about using an electric motor actuator vs a hydraulic actuator powered by an electric pump?
Last Answer : Too much wear on gears (and they would have to be huge), much more power advantage with hydraulics. Less parts. And more cost effective. And take up less space.
Description : How long is the longest rope ever manufactured?
Description : Is it clear what a flying car is from the images in the following page?
Last Answer : Yeah. Why? And, I don’t know. If you’ve seen the ‘Blade Runner’, and some other science fictions series and films, it just looks neat. But I doubt we’ll have much of those things until the relatively distant future… if then.