Sail E0 Webinar

MCQs

Total Questions : 448 | Page 45 of 45 pages
Question 441. . The total emissivity power is defined as the total amount of radiation emitted by a black body per unit
  1.    Temperature
  2.    Thickness
  3.    Area
  4.    Time
 Discuss Question
Answer: Option D. -> Time
Question 442. . In regenerator type heat exchanger, heat transfer takes place by
  1.    Direct mixing of hot and cold fluids
  2.    A complete separation between hot and cold fluids
  3.    Flow of hot and cold fluids alternately over a surface
  4.    Generation of heat again and again
 Discuss Question
Answer: Option C. -> Flow of hot and cold fluids alternately over a surface
Question 443. . Depending on the radiating properties, a body will be opaque when
  1.    ρ = 0, τ = 0 and α = 1
  2.    ρ = 1, τ = 0 and α = 0
  3.    ρ = 0, τ = 1 and α = 0
  4.    τ = 0, α+ρ = 1
 Discuss Question
Answer: Option D. -> τ = 0, α+ρ = 1
Question 444. . Planck's law holds good for
  1.    Black bodies
  2.    Polished bodies
  3.    All coloured bodies
  4.    All of the above
 Discuss Question
Answer: Option A. -> Black bodies
Question 445. . The emissive power of a body depends upon its
  1.    Temperature
  2.    Wave length
  3.    Physical nature
  4.    All of the above
 Discuss Question
Answer: Option D. -> All of the above
Question 446. . A grey body is one whose absorptivity
  1.    Varies with temperature
  2.    Varies with the wave length of incident ray
  3.    Varies with both
  4.    Does not vary with temperature and wave length of the incident ray
 Discuss Question
Answer: Option D. -> Does not vary with temperature and wave length of the incident ray
Question 447. . According to stefan's law, the total radiation from from a black body per unit area is proportional to
  1.    Absolute temperature T
  2.    T2
  3.    T4
  4.    1/T
 Discuss Question
Answer: Option C. -> T4
Question 448. . According to stefan's law, the total radiation from from a black body per unit area is proportional to
  1.    Absolute temperature T
  2.    T2
  3.    T4
  4.    1/T
 Discuss Question
Answer: Option C. -> T4

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