Sail E0 Webinar

MCQs

Total Questions : 448 | Page 38 of 45 pages
Question 371. . In convection heat transfer from hot flue gases to water tube, even though flow may be turbulent, a laminar flow region (boundary layer of film) exists close to the tube. The heat transfer through this film takes place by
  1.    Convection
  2.    Radiation
  3.    Conduction
  4.    Both convection and conduction
 Discuss Question
Answer: Option C. -> Conduction
Question 372. . Thermal radiation extends over the range of
  1.    0.01 to 0.1 μ
  2.    0.1 to 100 μ
  3.    100 to 250 μ
  4.    250 to 1000 μ
 Discuss Question
Answer: Option B. -> 0.1 to 100 μ
Question 373. . When heat is transferred from one particle of hot body to another by actual motion of the heated particles, it is referred to as heat transfer by
  1.    Conduction
  2.    Convection
  3.    Radiation
  4.    Convection and radiation
 Discuss Question
Answer: Option A. -> Conduction
Question 374. . The value of Prandtl number for air is about
  1.    0.1
  2.    0.3
  3.    0.7
  4.    1.7
 Discuss Question
Answer: Option C. -> 0.7
Question 375. . Thermal conductivity of air at room temperature in kcal/m hr °C is of the order of
  1.    0.002
  2.    0.02
  3.    0.01
  4.    0.1
 Discuss Question
Answer: Option B. -> 0.02
Question 376. . Which of the following is the case of heat transfer by radiation
  1.    Blast furnace
  2.    Heating of building
  3.    Cooling of parts in furnace
  4.    Heat received by a person from fireplace
 Discuss Question
Answer: Option D. -> Heat received by a person from fireplace
Question 377. . In free convection heat transfer, Nusselt number is function of
  1.    Grashof number and Reynold number
  2.    Grashof number and Prandtl number
  3.    Prandtl number and Reynold number
  4.    Grashof number, Prandtl number and Reynold number
 Discuss Question
Answer: Option B. -> Grashof number and Prandtl number
Question 378. . In counter flow heat exchangers
  1.    Both the fluids at inlet (of heat exchanger where hot fluid enters) are in their coldest state
  2.    Both the fluids at inlet are in their hottest state
  3.    Both the fluids at exit are in their hottest state
  4.    One fluid is in hottest state and other in coldest state at inlet
 Discuss Question
Answer: Option C. -> Both the fluids at exit are in their hottest state
Question 379. . Metals are good conductors of heat because
  1.    Their atoms collide frequently
  2.    Thier atoms are relatively far apart
  3.    They contain free electrons
  4.    They have high density
 Discuss Question
Answer: Option A. -> Their atoms collide frequently
Question 380. . Heat transfer by radiation mainly depends upon
  1.    Its temperature
  2.    Nature of the body
  3.    Kind and extent of its surface
  4.    All of the above
 Discuss Question
Answer: Option D. -> All of the above

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

GPOE / GPA Combined 1 Free CBT Mock Test SAIL E0 2024
Pie Chart - Test Paper 1 Data Interpretation Reasoning & DI
Chapter 1.1 : INTRODUCTION Chapter 1 : Raw Material Handling Plant SAIL E0 - GPOE/GPA 2024
Chapter 3.1 : INTRODUCTION Chapter 3 : Sinter Plant SAIL E0 - GPOE/GPA 2024
Chapter 2.3 : COAL HANDLING PLANT - Set 1 Chapter 2 : Coke Ovens and Coal Chemicals SAIL E0 - GPOE/GPA 2024