Sail E0 Webinar

MCQs

Total Questions : 1342 | Page 7 of 135 pages
Question 61. A one tonne refrigerating machine means that
  1.    One tonne is the total mass of machine
  2.    One tonne refrigerant is used
  3.    One tonne of water can be converted into ice
  4.    One tonne of ice when melts from and at 0° C in 24 hours, the refrigeration effect is equivalent to 210 kJ/min
 Discuss Question
Answer: Option D. -> One tonne of ice when melts from and at 0° C in 24 hours, the refrigeration effect is equivalent to 210 kJ/min
Question 62. When the air is passed through an insulated chamber having sprays of water maintained at a temperature higher than the dew point temperature of entering air but lower than its dry bulb temperature, then the air is said to be
  1.    Cooled and humidified
  2.    Cooled and dehumidified
  3.    Heated and humidified
  4.    Heated and dehumidified
 Discuss Question
Answer: Option A. -> Cooled and humidified
Question 63. The unit of thermal diffusivity is
  1.    m/hK
  2.    m/h
  3.    m²/h
  4.    m²/hK
 Discuss Question
Answer: Option C. -> m²/h
Question 64. Ammonia is
  1.    Non-toxic
  2.    Non-inflammable
  3.    Toxic and non-inflammable
  4.    Highly toxic and inflammable
 Discuss Question
Answer: Option D. -> Highly toxic and inflammable
Question 65. When the lower temperature of a refrigerating machine is fixed, then the coefficient of performance can be improved by
  1.    Operating the machine at higher speeds
  2.    Operating the machine at lower speeds
  3.    Raising the higher temperature
  4.    Lowering the higher temperature
 Discuss Question
Answer: Option D. -> Lowering the higher temperature
Question 66. The evaporator changes the low pressure liquid refrigerant from the expansion valve into
  1.    High pressure liquid refrigerant
  2.    Low pressure liquid and vapour refrigerant
  3.    Low pressure vapour refrigerant
  4.    None of these
 Discuss Question
Answer: Option C. -> Low pressure vapour refrigerant
Question 67. In refrigerator, liquid receiver is required between condenser and flow controlling device, if quantity of refrigerant for system is
  1.    Less than 2 kg
  2.    More than or equal to 3.65 kg
  3.    More than 10 kg
  4.    There is no such consideration
 Discuss Question
Answer: Option B. -> More than or equal to 3.65 kg
Question 68. The coefficient of performance is the ratio of the refrigerant effect to the
  1.    Heat of compression
  2.    Work done by compressor
  3.    Enthalpy increase in compressor
  4.    All of the above
 Discuss Question
Answer: Option D. -> All of the above
Question 69. Pressure of water vapour is given by
  1.    0.622 Pv/ (Pb - Pv)
  2.    μ/[1 - (1 - μ) (Ps/Pb)]
  3.    [Pv (Pb - Pd)]/ [Pd (Pb - Pv)]
  4.    None of these
 Discuss Question
Answer: Option D. -> None of these
Question 70. In vapour compression cycle using NH₃ as refrigerant, initial charge is filled at
  1.    Suction of compressor
  2.    Delivery of compressor
  3.    High pressure side close to receiver
  4.    Low pressure side near receiver
 Discuss Question
Answer: Option C. -> High pressure side close to receiver

Latest Videos
Chapter 1 - GLOBAL STEEL SCENARIO & INDIAN STEEL INDUSTRY Part 1 : (13-04-2024) INDUSTRY AND COMPANY AWARENESS (ICA)
Direction Sense Test Part 1 Reasoning (Hindi)
Chapter 1 - RMHP / OHP / OB & BP Part 1 : (14-02-2024) GPOE
Cube & Cuboid Part 1 Reasoning (Hindi)
Data Interpretation (DI) Basic Concept Reasoning (Hindi)
Counting Figures Part 1 Counting Of Straight Lines Reasoning (Hindi)
Sail E0 free webinar Webinars
Real Numbers Part 7 Class 10 Maths
Real Numbers Part 1 Class 10 Maths
Polynomials Part 1 Class 10 Maths

Latest Test Papers

Pie Chart - Test Paper 1 Data Interpretation Reasoning & DI
Tabulation - Test Paper 2 Data Interpretation Reasoning & DI
Test Paper 1 Direction Sense Test Reasoning & DI
ICA , RDIC,GFM Free Modal Test Paper - Non - Technical Branch Old Syllabus 2022 - SAIL Junior Officer E0
GFM Combined 1 Free Revision Test SAIL JO E-0