## 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
Answer: Option 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
Answer: Option 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
Answer: Option 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
Answer: Option 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
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
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
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
Answer: Option 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
Answer: Option C. -> 1, 2 and 3