Engine Performance. Test 8 – Online Maritime Tests

For which type of controller are these the input (left) and the response (right) characteristics ?

A proportional integrating controller
A pneumatic inverter
A pressure integrating controller
A pneumatic integrator

Thermal efficiency refers to heat engines and is the ratio of _____

output on the shaft/flywheel to internally produced power.
input to the output on the power take off.
horsepower to BTU input of fuel.
Output to BTU converted in energy.

This characteristic shows output pressure of a pneumatic controller controlling water level. The level is fluctuating. What is wrong with the setting of the controller.?

The range is too large.
The proportional band is too small.
The span is too narrow.
The amplification is too small.

Suppose the Proportional Band of this pneumatic controller is increased to 500 % and the input variation remains the same. What would be the output variation ?

5 psi
0.5 psi
0.2 psi
1 psi

What measure of power developed inside a cylinder is obtained by using the formula PMI x cylinder section surface (cm2) x stroke (metre) : 75 ?

Indicated horsepower.
Brake horsepower.
Effective horsepower.
Metric Horsepower.

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