Sail E0 Webinar

MCQs

Total Questions : 448 | Page 40 of 45 pages
Question 391. . A steam pipe is to be insulated by two insulating materials put over each other. For best results
  1.    Better insulation should be put over pipe and better one over it
  2.    Inferior insulation should be put over pipe and better one over it
  3.    Both may be put in any order
  4.    Whether to put inferior on over pipe or the better one would depend on steam temperature
 Discuss Question
Answer: Option A. -> Better insulation should be put over pipe and better one over it
Question 392. . Thermal conductivity of water in general with rise in temperature
  1.    Increases
  2.    Decreases
  3.    May increase or decrease depending on temperature
  4.    None of the above
 Discuss Question
Answer: Option C. -> May increase or decrease depending on temperature
Question 393. . The ratio of emissive power of a body to the emissive power of a perfectly black body is called "
  1.    Absorptivity
  2.    Emissivity
  3.    Diffusivity
  4.    Conductivity
 Discuss Question
Answer: Option B. -> Emissivity
Question 394. . An electric furnace has a laminated wall composed of 0.2 m of refractory brick (k=2), 0.15 m of insulation (k =0.15), and 0.15 m of brick having (k= 1.5). Inner and outer temperatures of wall are 1027°C and 27°C respectively. Units of k are kcal-m/hr m2 °C. If surface area of the wall is 1.2 m2, heat transfer rate will be
  1.    10 kcal/hr
  2.    100 kcal/hr
  3.    1000 kcal/hr
  4.    10,000 kcal/hr
 Discuss Question
Answer: Option C. -> 1000 kcal/hr
Question 395. . Which of the following is expected to have highest thermal conductivity
  1.    Steam
  2.    Solid ice
  3.    Melting ice
  4.    Water
 Discuss Question
Answer: Option B. -> Solid ice
Question 396. . All radiations in a black body are
  1.    Reflected
  2.    Refracted
  3.    Transmitted
  4.    Absorbed
 Discuss Question
Answer: Option D. -> Absorbed
Question 397. . A perfect black body is one which
  1.    Is black in colour
  2.    Reflects all heat
  3.    Transmits all heat radiations
  4.    Absorbs heat radiations of all wave lengths falling on it
 Discuss Question
Answer: Option D. -> Absorbs heat radiations of all wave lengths falling on it
Question 398. . Temperature of steam at around 540°C can be measured by
  1.    Thermometer
  2.    Thermistor
  3.    Thermocouple
  4.    Thermopile
 Discuss Question
Answer: Option C. -> Thermocouple
Question 399. . Thermal conductivity of water at 20°C is of the order of
  1.    0.1
  2.    0.23
  3.    0.42
  4.    0.51
 Discuss Question
Answer: Option D. -> 0.51
Question 400. . If the temperature of a solid surface changes form 27°C to 627°C, then its emissive power changes in the ratio of
  1.    3
  2.    81
  3.    9
  4.    27
 Discuss Question
Answer: Option B. -> 81

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

DSP Combined 1 Free Revision Test SAIL JO E-0
GPOE / GPA Combined 1 Free Revision Test SAIL JO E-0
BSP Plant Specific Review Test SAIL JO E-0
BSL Combined 1 Free Revision Test SAIL JO E-0
GFM Combined 1 Free Revision Test SAIL JO E-0