The maximum efficiency of a lifting machine is 1/m V.R./m m/V.R. 1/(m x V.R.)

CuriousTab

CuriousTab

Home Aptitude

Discussion

Home ‣ Mechanical Engineering ‣ Engineering Mechanics Comments

Question
The maximum efficiency of a lifting machine is
Options
A. 1/m
B. V.R./m
C. m/V.R.
D. 1/(m x V.R.)

Correct Answer

1/(m x V.R.)

Engineering Mechanics problems

Search Results

1. A block of mass m₁, placed on an inclined smooth plane is connected by a light string passing over a smooth pulley to mass m₂, which moves vertically downwards as shown in the below figure. The tension in the string is
Options
A. m₁/m₂
B. m₁.g sin ?
C. m₁.m₂/m₁+m₂
D.

2. The point, through which the whole weight of the body acts, irrespective of its position, is known as
Options
A. moment of inertia
B. centre of gravity
C. centre of percussion
D. centre of mass

3. Which of the following statement is correct?
Options
A. The kinetic energy of a body during impact remains constant.
B. The kinetic energy of a body before impact is equal to the kinetic energy of a body after impact.
C. The kinetic energy of a body before impact is less than the kinetic energy of a body after impact.
D. The kinetic energy of a body before impact is more than the kinetic energy of a body after impact.

5. In radial tyres
Options
A. one ply layer runs diagonally one way and another layer runs diagonally the other way
B. all plies run parallel to one another and vertical to tyre bead
C. inner tubes are always used
D. none of these

6. The principle of transmissibility of forces states that, when a force acts upon a body, its effect is
Options
A. same at every point on its line of action
B. different at different points on its line of action
C. minimum, if it acts at the centre of gravity of the body
D. maximum, if it acts at the centre of gravity of the body

Comments

More in Mechanical Engineering: