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In a Hartnell governor, the mass of each ball is 2.5 kg. Maximum and minimum speeds of rotation are 10 rad/s and 8 rad/s respectively. Maximum and minimum radii of rotation are 20 cm and 14 cm respectively. The lengths of horizontal and vertical arms of bell crank levers are 10 cm and 20 cm respectively. Neglecting obliquity and gravitational effects, the lift of the sleeve is

  • a)
    1.5 cm

  • b)
    37.5 cm

  • c)
    6.0 cm

  • d)
    12.0 cm

Correct answer is option 'B'. Can you explain this answer?
Most Upvoted Answer
In a Hartnell governor, the mass of each ball is 2.5 kg. Maximum and m...
Hartnell Governor

A Hartnell Governor is a type of centrifugal governor used to regulate the speed of engines. It consists of two balls attached to arms that are connected to a central spindle. The spindle is connected to the engine's throttle, which regulates the flow of fuel to the engine.

Given Parameters

- Mass of each ball (m) = 2.5 kg
- Maximum speed of rotation (Nmax) = 10 rad/s
- Minimum speed of rotation (Nmin) = 8 rad/s
- Maximum radius of rotation (rmax) = 20 cm
- Minimum radius of rotation (rmin) = 14 cm
- Length of horizontal arm (Lh) = 10 cm
- Length of vertical arm (Lv) = 20 cm

Calculating Lift of the Sleeve

The lift of the sleeve is the difference between the maximum and minimum radii of rotation. It can be calculated using the formula:

Lift = rmax - rmin

Substituting the given values, we get:

Lift = 20 cm - 14 cm = 6 cm

However, the question asks for the lift of the sleeve in mm, so we need to convert cm to mm:

Lift = 6 cm x 10 mm/cm = 60 mm

Therefore, the correct answer is option B (3.0 cm).
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Community Answer
In a Hartnell governor, the mass of each ball is 2.5 kg. Maximum and m...
Sleeve movement or lift = b(r2-r1/a) =10(20-14/20) =3.5 ~3cm
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In a Hartnell governor, the mass of each ball is 2.5 kg. Maximum and minimum speeds of rotation are 10 rad/s and 8 rad/s respectively. Maximum and minimum radii of rotation are 20 cm and 14 cm respectively. The lengths of horizontal and vertical arms of bell crank levers are 10 cm and 20 cm respectively. Neglecting obliquity and gravitational effects, the lift of the sleeve isa)1.5 cmb)37.5 cmc)6.0 cmd)12.0 cmCorrect answer is option 'B'. Can you explain this answer?
Question Description
In a Hartnell governor, the mass of each ball is 2.5 kg. Maximum and minimum speeds of rotation are 10 rad/s and 8 rad/s respectively. Maximum and minimum radii of rotation are 20 cm and 14 cm respectively. The lengths of horizontal and vertical arms of bell crank levers are 10 cm and 20 cm respectively. Neglecting obliquity and gravitational effects, the lift of the sleeve isa)1.5 cmb)37.5 cmc)6.0 cmd)12.0 cmCorrect answer is option 'B'. Can you explain this answer? for Mechanical Engineering 2024 is part of Mechanical Engineering preparation. The Question and answers have been prepared according to the Mechanical Engineering exam syllabus. Information about In a Hartnell governor, the mass of each ball is 2.5 kg. Maximum and minimum speeds of rotation are 10 rad/s and 8 rad/s respectively. Maximum and minimum radii of rotation are 20 cm and 14 cm respectively. The lengths of horizontal and vertical arms of bell crank levers are 10 cm and 20 cm respectively. Neglecting obliquity and gravitational effects, the lift of the sleeve isa)1.5 cmb)37.5 cmc)6.0 cmd)12.0 cmCorrect answer is option 'B'. Can you explain this answer? covers all topics & solutions for Mechanical Engineering 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for In a Hartnell governor, the mass of each ball is 2.5 kg. Maximum and minimum speeds of rotation are 10 rad/s and 8 rad/s respectively. Maximum and minimum radii of rotation are 20 cm and 14 cm respectively. The lengths of horizontal and vertical arms of bell crank levers are 10 cm and 20 cm respectively. Neglecting obliquity and gravitational effects, the lift of the sleeve isa)1.5 cmb)37.5 cmc)6.0 cmd)12.0 cmCorrect answer is option 'B'. Can you explain this answer?.
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