Testbook Logo
Exams SuperCoaching Test Series Skill Academy
More
English
Hindi

Question

Download Solution PDF

As relative humidity decreases, the dew point will be

This question was previously asked in
UKPSC JE Mechanical 2013 Official Paper II
Download PDF Attempt Online
View all UKPSC JE Papers >
  1. lower than wet bulb temperature
  2. higher than wet bulb temperature
  3. equal to wet bulb temperature
  4. None of these

Answer (Detailed Solution Below)

Option 1 : lower than wet bulb temperature
Free Tests
View all Free tests >
Free
UKPSC JE CE Full Test 1 (Paper I)
1.8 K Users
180 Questions 360 Marks 180 Mins
Start Now

Detailed Solution

Download Solution PDF

Explanation:

For sensible heating process

  1. Dry Bulb Temperature increases
  2. Wet Bulb Temperature increases
  3. Dew Point Temperature, Specific humidity and vapour pressure remains constant
  4. Enthalpy increases
  5. Relative humidity decreases

As relative humidity decreases, the dew point will be lower than wet bulb temperature.

Psychrometric chart for sensible Heating

Download Solution PDF
Latest UKPSC JE Updates

Last updated on Mar 26, 2025

-> UKPSC JE Notification for 2025 will be out soon!

-> The total number of vacancies along with application dates will be mentioned in the notification.

-> The exam will be conducted to recruit Junior Engineers through Uttarakhand Public Service Commission. 

-> Candidates with an engineering diploma in the concerned field are eligible. 

-> The selection process includes a written exam and document verification. Prepare for the exam with UKPSC JE Previous Year Papers.

More Properties of Moist Air (Psychrometric Properties) Questions

Q1.For a winter air-conditioning system, relative humidity should NOT be more than:
Q2.The optimum effective temperature for human comfort is
Q3.An air water vapour mixture has a DBT of 60°C and a DPT of 40°C. The WBT (Tw) for the above mixture would be
Q4.If 1 kg of air having specific humidity of 0.03 kg/kg of dry air mixes with 2 kg of air having specific humidity of 0.015 kg/kg of dry air. The specific humidity of the mixture in kg/kg of dry air will be approximate:
Q5.As relative humidity decreases, the dew point will be
Q6.If PV is partial pressure of water vapour in air and PS is saturation pressure of water vapour at same temperature, then relative humidity is equal to
Q7.Specific humidity (ω) is represented by: (where, p = pa + pv : pa is pressure of dry air and pv is pressure of water vapour)
Q8.A conference hall of the size 7m × 4m × 4m is filled with an air–water vapour mixture of 38° C, atmospheric pressure of 1 bar and RH 70%. The mass of air will be (assume Ps at 38° C = 0.06624 bar):
Q9.Ambient pressure, temperature and relative humidity at a location are 101 kPa, 300 K, and 60% respectively. The saturation pressure of water at 300 K is 3.6 kPa. The specific humidity of ambient air is _______ g/kg of dry air.
Q10.The relative humidity of ambient air at 300 K is 50% with a partial pressure of water vapour equal to Pv. The saturation pressure of water at 300 K is Psat. The correct relation for the air-water mixture is 

More Air Conditioning Questions

Q1.For a winter air-conditioning system, relative humidity should NOT be more than:
Q2.In the winter air-conditioning, for comfort, moisture is added without changing its dry bulb temperature and the air is made to warm up. Identify the type of process.
Q3.The ratio of the sensible heat transfer to the total heat transfer in air - conditioning systems is known as ______.
Q4.Sensible heating is required to:
Q5.What is Air Conditioning?
Q6.The vertical and uniformly spaced lines on a psychrometric chart indicate _______.
Q7.The mass of water vapour present in 1 kg of dry air, and is generally expressed in terms of grams per kg of dry air is called _______.
Q8.The optimum effective temperature for human comfort is
Q9.On a Psychrometric chart, adiabatic process follows
Q10.An air water vapour mixture has a DBT of 60°C and a DPT of 40°C. The WBT (Tw) for the above mixture would be
Crack UKPSC JE with
India's Super Teachers
Explore Supercoaching For FREE
Suggested Test Series
View All >
Uttarakhand Combined State Civil/Upper Subordinate Services Examination 2025
38 Total Tests with 1 Free Tests
Start Free Test
UKSSSC Group C (Patwari/Lekhpal/VDO/VPDO) Test Series 2025
148 Total Tests with   3 Free Tests
Start Free Test
Suggested Exams
Exam-Logo
UKPSC JE

UKPSC JE Important Links

More Refrigeration and Air Conditioning Questions

Q1.The boiling point of refrigerant R - 13 is __________.
Q2.Which of the following is NOT a function of lubricating oils used in refrigerants? 
Q3.In a vapour compression refrigeration system, the lowest temperature during the cycle is observed after: 
Q4.In the P - H diagram of the vapour compression cycle, the compression process is shown by a / an ___________.
Q5.For a winter air-conditioning system, relative humidity should NOT be more than:
Q6.For ammonia refrigerating systems, the tubes of a shell and tube condenser are made of_______. 
Q7.In a vapour absorption refrigeration system, heating, cooling and refrigeration take place at the temperatures of 100°C, 20°C and -5°C, respectively. Find the maximum C.O.P. of the system. 
Q8.Which of the following methods is NOT used for the leakage detection of CFC refrigerants? 
Q9.The fully halogenated refrigerants with chlorine (Cl) atom in their molecules are referred to as: 
Q10.The boiling point of inorganic refrigerant R - 744 is _________. 
Important Exams
Super Coaching
Exams
Test Series
Previous Year Papers
Objective Questions
Testbook Edu Solutions Pvt. Ltd.
1st & 2nd Floor, Zion Building,
Plot No. 273, Sector 10, Kharghar,
Navi Mumbai - 410210
[email protected]
Toll Free:1800 833 0800
Office Hours: 10 AM to 7 PM (all 7 days)
Company
About usCareers We are hiringTeach Online on TestbookPartnersMediaSitemap
Products
Test SeriesTestbook PassOnline CoursesOnline VideosPracticeBlogRefer & EarnBooks
Our Apps
Follow us on
Copyright © 2014-2022 Testbook Edu Solutions Pvt. Ltd.: All rights reserved
User PolicyTermsPrivacy
Get Free Access Now
Hot Links： dhani teen patti teen patti joy teen patti master new version