Important: Use custom search function to get better results from our thousands of pages

Use " " for compulsory search eg:"electronics seminar" , use -" " for filter something eg: "electronics seminar" -"/tag/" (used for exclude results from tag pages)


Tags: Examinations, Regular, Semester, BTech, IV BTech I Semester Regular Examinations,
 
 
Thread Rating:
  • 0 Votes - 0 Average
  • 1
  • 2
  • 3
  • 4
  • 5
IV B.Tech. I Semester Regular Examinations
Post: #1


.doc  Refrigeration and Air Conditioning 4-1 Set-4 (K).doc (Size: 346 KB / Downloads: 5)

Explain the working of Bell Colemann cycle with a neat sketch. [9] (Unit-I, Topic No. 1.3)
Explain how does the body attempt to compensate for a cool environment which tends to lower the internal
temperature. [6] (Unit-VII, Topic No. 7.1)

Explain the methods that are to be employed to improve the C.O.P of a vapour compression refrigeration
system. [8] (Unit-II, Topic No. 2.1)
Distinguish between dry and wet compression. What are the advantages of one over the other? [7]
(Unit-II, Topic No. 2.1)

With a neat sketch explain the working of automatic expansion valve. [8] (Unit-III, Topic No. 3.4)
Explain how Ozone is depleted by CFCs. [7] (Unit-III, Topic No. 3.5)

With a neat sketch explain the working of simple vapour absorption system. [7] (Unit-IV, Topic No. 4.1)
In an absorption type refrigerator, the heat is supplied to NH3 generator by condensing steam at 2 bar and 90%
dry. The temperature to be maintained in the refrigerator is – 5° C. The temperature of the atomosphere is 30° C.
Find the maximum possible COP of the refrigerator. If the refrigeration load is 20 tons and actual COP is 70% of
maximum COP. Find the mass of steam required per hour. [8] (Unit-IV, Topic No. 4.2)

In a steam jet refrigeration installation, the steam is available at 6.5 bar dry and saturated and chilled water flash
chamber is kept at 5 cm of Hg. The mixture of steam and flashed water at the entry of the diffuser has a quality
of 0.90. Assuming nozzle efficiency 0.90, mixing efficiency 0.67 and diffuser efficiency 0.78 and make up water
at 28° C. Determine,
(i)
Mass of motive steam per kg of flashed vapour
(ii) Mass of motive steam per ton of refrigeration effect
(iii) COP
(iv) COP as compared to an ideal cycle. [10] (Unit-V, Topic No. 5.1)
Explain with a neat diagram, the working of vortex tube. [5] (Unit-V, Topic No. 5.3)

Draw and explain the comfort chart and zone of comfort for year-round air conditioning. [7]
(Unit-VII, Topic No. 7.1)
A sling psychrometric reads 44° C DBT and 30° C WBT. Calculate the following,
(i)
Specific humidity
(ii) Relative humidity
(iii) Dew point temperature
(iv) Enthalpy of mixture assume pressure of atmospheric air to be 1.013 bar. [8] (Unit-VI, Topic No. 6.1)
 


[-]
Quick Reply
Message
Type your reply to this message here.

Image Verification
Image Verification
(case insensitive)
Please enter the text within the image on the left in to the text box below. This process is used to prevent automated posts.

Possibly Related Threads...
Thread: Author Replies: Views: Last Post
  refrigeration projects m tech level Guest 0 0 17-06-2017 10:59 PM
Last Post: Guest
  diploma in civil engineering 5th semester minor projects Guest 1 168 05-05-2017 03:20 PM
Last Post: jaseela123
  m tech seminar topics for digital system computer electronics Guest 1 179 03-05-2017 02:51 PM
Last Post: jaseela123
  m tech thesis in computer science rgpv bhopal format Guest 1 182 02-05-2017 02:48 PM
Last Post: jaseela123
  b tech 1st year surface chemistry notes ppt Guest 1 273 29-04-2017 04:13 PM
Last Post: jaseela123
  environmental project for m tech students Guest 1 210 25-04-2017 04:52 PM
Last Post: jaseela123
  www 6th semester automobile engineering anna university ppt Guest 1 217 21-04-2017 11:27 AM
Last Post: jaseela123
  multipath dissemination in regular mesh topology free source cod Guest 1 0 20-04-2017 04:20 PM
Last Post: jaseela123
  technical seminar topics for m tech cnis Guest 1 331 18-04-2017 04:15 PM
Last Post: jaseela123
  seminar topic of civil m tech cad structure Guest 1 237 03-04-2017 12:57 PM
Last Post: jaseela123
This Page May Contain What is IV B.Tech. I Semester Regular Examinations And Latest Information/News About IV B.Tech. I Semester Regular Examinations,If Not ...Use Search to get more info about IV B.Tech. I Semester Regular Examinations Or Ask Here

Options: