Sail E0 Webinar

MCQs

Total Questions : 69 | Page 6 of 7 pages
Question 51. If there are 6 physical quantities and 3 fundamental units, then the number of pi terms are
  1.    1
  2.    2
  3.    3
  4.    4
 Discuss Question
Answer: Option C. -> 3
Answer: (c).3
Question 52. Which of the following is not known as core group?
  1.    Time
  2.    Geometric property
  3.    Fluid property
  4.    Flow characteristics
 Discuss Question
Answer: Option A. -> Time
Answer: (a).Time
Question 53. The resistance R experienced by a partially submerged body depends upon the velocity V, length of the body l, viscosity of the fluid µ, density of the fluid p and gravitational acceleration g. Establish a relation between involving non-dimensional groups
  1.    R = p V l² function [p V l/ µ, V/ (lg)^1/2].
  2.    R = p l² function [p V l/ µ, V/ (lg)^1/2].
  3.    R = V² l² function [p V l/ µ, V/ (lg)^1/2].
  4.    R = p V² l function [p V l/ µ, V/ (lg)^1/2].
 Discuss Question
Answer: Option D. -> R = p V² l function [p V l/ µ, V/ (lg)^1/2].
Answer: (d).R = p V² l function [p V l/ µ, V/ (lg)^1/2].
Question 54. What is the dimension of resistance?
  1.    M L T²
  2.    M L T
  3.    M L T¯²
  4.    M L T¯¹
 Discuss Question
Answer: Option C. -> M L T¯²
Answer: (c).M L T¯²
Question 55. The ratio of heat flow rate by convection to flow rate by conduction is known as
  1.    Stanton number
  2.    Graetz number
  3.    Fourier number
  4.    Peclet number
 Discuss Question
Answer: Option D. -> Peclet number
Answer: (d).Peclet number
Question 56. The ratio of heat capacity of fluid flowing through the pipe per unit of length to the conductivity of pipe material is known as
  1.    Graetz number
  2.    Reynolds number
  3.    Peclet number
  4.    Fourier number
 Discuss Question
Answer: Option A. -> Graetz number
Answer: (a).Graetz number
Question 57. Identify the correct statement
  1.    Peclet number = (Graetz number) (Fourier number)
  2.    Peclet number = (Stanton number) (Fourier number)
  3.    Peclet number = (Reynolds number) (Prandtl number)
  4.    Peclet number = (Graetz number) (Reynolds number)
 Discuss Question
Answer: Option C. -> Peclet number = (Reynolds number) (Prandtl number)
Answer: (c).Peclet number = (Reynolds number) (Prandtl number)
Question 58. What is the value of Prandtl number for highly viscous oils?
  1.    100-1000
  2.    0-100
  3.    10-100
  4.    100-10000
 Discuss Question
Answer: Option D. -> 100-10000
Answer: (d).100-10000
Question 59. What is the value of Prandtl number for liquid metals?
  1.    0.003-0.01
  2.    0.01-0.1
  3.    0.1-0.5
  4.    0.5-0.95
 Discuss Question
Answer: Option A. -> 0.003-0.01
Answer: (a).0.003-0.01
Question 60. The convective film coefficient in k cal/m² hr degree can be converted to J/m² s degree by multiplying it with a factor
  1.    1.1627
  2.    1.1527
  3.    1.1427
  4.    1.1327
 Discuss Question
Answer: Option A. -> 1.1627
Answer: (a).1.1627

Latest Videos

Latest Test Papers