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Q: What maximum efficiency can be obtained with four pulleys and a mechanical advantage is 3?

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Mechanical Efficiency is the ratio of Actual mechanical advantage to ideal mechanical advantage.Efficiency will be maximum when Actual mechanical advantage equals that of ideal.But practically not possible.Actual mechanical advantage will be less due to friction,heat,deflection etc.avoiding these loses will increase the machine efficiency.

Mechanical advantage is maximum when weight lifted is extremly high and for which C/W is extremely small so as to be negleted, Max. Mechanical Advantage=1/m

No. "Ideal" in this case means "the maximum that can be achieved under ideal circumstances". Therefore, the real mechanical advantage will be less than or equal to the ideal.

the efficiency is maximum in a transformer when no load loss is equal to load loss.

No. Maximum efficiency occurs when the iron and copper losses are equal.

Close packing and compression of aggregates for maximum rigidity and strength after curing.

Because that is the obvious point to have maximum efficiency occur.

Condition for maximum efficiency is when copper loss is equal to iron loss.

some approach 33% Carnot efficiency maximum

It is maximum at about 75% to 100% of the motor rated load. Efficiency is maximum at unity power factor , when R=X and when variable losses Is equal to constant losses at rated load.

They're relatively light weight, and they have a concentrated fuel source. They have a narrow speed range of maximum efficiency, and they spew fumes.

50%

39%

78%

thermal

The maximum efficiency condition in distribution transformer is said to be occurred when iron loss = copper loss

The approximate efficiency of aerobic respiration is 39%

Structural Efficiency= Maximum Mass Supported _______________________ (Divided By) Mass of Structure

It is not designed that way. It is inherent characteristic of the equipment. It is true even for motors. Condition for maximum efficiency is when copper losses are equal to iron losses. In other words, efficiency is maximum when no load losses are equal to load losses. Efficiency will not be maximum at maximum load.

It is always desirable to run any equipment or device at maximum efficiency for that matter, not only the power transformer. Power transformer maximum efficiency occurs when copper loss is equal to iron loss. (or no load loss equals to load loss). This does not necessariliy mean that maximum efficiency occurs at maximum or full load. Generally the maximum efficiency occurs at relatively less than full load of the transformer.

That is the maximum efficiency occurs when the copper losses are equal to the core losses of the transformer.

A ficticious heat engine that works at the maximum theoretical efficiency is called a Carnot engine. Real engines, that obviously work at a lesser efficiency, include the combustion engines found in cars.A ficticious heat engine that works at the maximum theoretical efficiency is called a Carnot engine. Real engines, that obviously work at a lesser efficiency, include the combustion engines found in cars.A ficticious heat engine that works at the maximum theoretical efficiency is called a Carnot engine. Real engines, that obviously work at a lesser efficiency, include the combustion engines found in cars.A ficticious heat engine that works at the maximum theoretical efficiency is called a Carnot engine. Real engines, that obviously work at a lesser efficiency, include the combustion engines found in cars.

actually mechanical advantage is the ratio of load to effort. it is the measure of the effort required to move the load. its maximum value is given by 1/m where m is the slope of graph plotted with load on X axis and effort on Y axis. hope your got the answer.

The ideal mechanical advantage (IMA), or theoretical mechanical advantage, is the mechanical advantage of a device with the assumption that its components do not flex, there is no friction, and there is no wear. It is calculated using the physical dimensions of the device and defines the maximum performance the device can achieve.The assumptions of an ideal machine are equivalent to the requirement that the machine does not store or dissipate energy; the power into the machine thus equals the power out. Therefore, the power P is constant through the machine and force times velocity into the machine equals the force times velocity out.The ideal mechanical advantage is the ratio of the force, or effort, out of the machine relative to the force or effort into the machine.

Less than 100%