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MCQs

Total Questions : 69 | Page 5 of 7 pages
Question 41. What is the dimension of gravity?
  1.    M L T¯²
  2.    L T¯²
  3.    M L T¯¹
  4.    L T¯⁴
 Discuss Question
Answer: Option B. -> L T¯²
Answer: (b).L T¯²
Question 42. What is the dimension of acceleration?
  1.    M L T¯²
  2.    L T¯⁴
  3.    M L T¯¹
  4.    L T¯²
 Discuss Question
Answer: Option D. -> L T¯²
Answer: (d).L T¯²
Question 43. What is the dimension of thermal conductivity?
  1.    M L T¯³ α¯¹
  2.    M L T¯³
  3.    M L T¯² α¯¹
  4.    M L T¯³ α¯²
 Discuss Question
Answer: Option A. -> M L T¯³ α¯¹
Answer: (a).M L T¯³ α¯¹
Question 44. What is the dimension of specific heat?
  1.    L T¯¹ α¯¹
  2.    M L T¯¹ α¯¹
  3.    L T¯² α¯¹
  4.    M L T¯² α¯¹
 Discuss Question
Answer: Option C. -> L T¯² α¯¹
Answer: (c).L T¯² α¯¹
Question 45. How is dimensional homogeneity related with fundamental units of measurements?
  1.    Independent
  2.    Dependent
  3.    Dependent but can vary
  4.    Twice
 Discuss Question
Answer: Option A. -> Independent
Answer: (a).Independent
Question 46. Bernoulli’s equation for fluid flow along a stream line is given as
  1.    p/w + V²/2 g + y = 2
  2.    p/w + V/2 g + y = constant
  3.    p/w + V²/2 g + y = 1
  4.    p/w + V²/2 g + y = constant
 Discuss Question
Answer: Option D. -> p/w + V²/2 g + y = constant
Answer: (d).p/w + V²/2 g + y = constant
Question 47. The equation of friction loss in a pipe of length l and diameter d through which fluid flows with velocity v is
  1.    h i = 4 f V²/d g
  2.    h i = 4 f V²/d 2 g
  3.    h i = 4 f V²/d 2 g
  4.    h i = 4 f V²/2 g
 Discuss Question
Answer: Option C. -> h i = 4 f V²/d 2 g
Answer: (c).h i = 4 f V²/d 2 g
Question 48. What is the time period of oscillation of a simple pendulum of length L and mass m?
  1.    2 π (L/g)^3/2
  2.    2 π (L/g)
  3.    2 π (L/g)^2
  4.    2 π (L/g)^1/2
 Discuss Question
Answer: Option D. -> 2 π (L/g)^1/2
Answer: (d).2 π (L/g)^1/2
Question 49. The principle of dimensional homogeneity serves the following useful concepts
(i) It helps to check whether an equation of any physical phenomenon is dimensionally homogenous or not
(ii) It helps to determine the dimensions of a physical quantity
(iii) It helps to convert the units from one system to another
Identify the correct statements
  1.    1 and 2
  2.    2 and 3
  3.    1, 2 and 3
  4.    2 only
 Discuss Question
Answer: Option C. -> 1, 2 and 3
Answer: (c).1, 2 and 3
Question 50. If there are n variables in a dimensionally homogeneous equation and if these variables contain m primary dimensions, then the variables can be grouped into how many non-dimensional parameters?
  1.    m
  2.    n-m
  3.    n-2m
  4.    n
 Discuss Question
Answer: Option B. -> n-m
Answer: (b).n-m

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