Theory Of Machine - Study Mode
[#221] Carnot cycle is
Correct Answer
(A) A reversible cycle
[#222] The unbalanced primary forces in a reciprocating engine are
Correct Answer
(B) Balanced partially
[#223] A motor car moving at a certain speed takes a left turn in a curved path. If the engine rotates in the same direction as that of wheels, men due to centrifugal force
Correct Answer
(B) The reaction on the outer wheels increases and on the inner wheels decreases
[#224] If the radius of gyration of a compound pendulum about an axis through e.g. is more, then its frequency of oscillation will be
Correct Answer
(A) Less
Explanation
Solution: The frequency of oscillation of a compound pendulum is inversely proportional to the radius of gyration about the axis of rotation. The radius of gyration (k) is a measure of how mass is distributed relative to the axis of rotation. A larger radius of gyration means the mass is more spread out, leading to a lower frequency of oscillation. Let's analyze each option: Option A: "Less" - This is correct because a larger radius of gyration results in a longer period of oscillation, thus reducing the frequency. Option B: "More" - This is incorrect as frequency decreases with an increase in the radius of gyration. Option C: "Same" - This is incorrect because frequency and radius of gyration are inversely related. Option D: "Data are insufficient to determine same" - This is incorrect because the relationship between frequency and radius of gyration is well-established in physics. Therefore, the correct answer is Option A: Less .
[#225] In gramophones for adjusting the speed of the turntable, the following type of governor is commonly employed
Correct Answer
(C) Pickering governor