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30 Cards in this Set
- Front
- Back
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The actual mechanical advantage of a belt drive-system equals:
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The Ratio of Torques
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A decrease in angular speed on the output pulley of a belt drive system causes the amount of torque on the output pulley to:
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Increase
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What increases from input to output in a hydraulic jack?
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Force and Piston Area
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What decreases from input to output in a hydraulic jack?
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Piston Movement
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At a power substation, electrical transformers are used to:
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Step-up Voltage
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How does the linear impulse of a 10 pound force acting on an object for 5 seconds compare to the linear impulse of a 5 pound force acting on the same object for 10 seconds?
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The Same as
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A hand cranked generator produces 45 watt of output power. The handle is 6in long and it requires 12.5 pound of force to turn the generator at 1 rev per second. What is the effciency of the generator?
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84.5%
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A waterwheel uses fluid energy to rotate a shaft. What's the fluid power input to the waterwheel when the shaft output is 15,000 hp and the energy conversion is 37% efficient?
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5,550 hp
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A single junction thermocouple is made of:
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Two wires of different metals
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With a constant voltage applied to the strain gages attached to a bridge superstructure, as the bridge is stressed resistance in the strain gages change. An appropriate instrument to monitor the stress would be a/an:
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Amp Meter
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Because of its accuracy and its ability to measure both direct pressure and indirect pressure, fluid pressure sensors are often calibrated against a
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Manometer
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A fluid transducer that measures altitude is called a:
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Altimeter
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A loading ramp rises 12 feet on one end to a platform. If the ramp has an IMA of 4, how long is the ramp?
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48 feet
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The ideal mechanical advantage of a rotational force transformer is always:
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Equal to or greater than the actual mechanical advantage
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If the efficiency of a gear drive is 80% and the IMA is 20, what would be the actual mechanical advantage?
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16.0
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What is the mechanical advantage in a hydraulic jack whose input force of 20 pound delivers a 300 pound output force to the load?
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15
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The ideal mechanical advantage of a jack is given as:
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IMA = Di/Do
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Current flow from the secondary windings of an electric transformer can be monitored by connecting a:
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Digital multi-meter in series
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in an electrical transformer designed to step down voltage, if resistance is present in the coil windings the actual electrical advantage can be found by:
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Dividing the current in by the current out
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What ratio, because of it's consistency, is used to determine ideal electrical advantage in electrical transformer?
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Wire Turn
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In the English system of units a slug is a unit of:
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Mass
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Angular impulse is found with the equation:
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AngImp = T X W
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A rotating object's moment of inertia times its angular velocity is known as:
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Angular Momentum
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A mechanical energy convertor changes:
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Mechanical Energy to thermal, electrical, or fluid energy
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In the English system, a common unit for fluid energy is:
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FtLB
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A 0.5 hp electric motor delivers 373 watts of output mechanical power. The motor is 93.2% efficient. The amount of input power needed to run the motor is:
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400 watt
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The purpose of a thermopile is to convert
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Heat energy to electrical energy
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An an accelerometer, a piezoelectric crystal generates an electric output when the:
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Rate of motion of a certain mass attched to the crystal is changed
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Mechanical transducers detect mechanical change such as a movement and:
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Change the information into useful signals that can be interpreted and used
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A device used to "sense" the condition of a fluid system is called a:
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Fluid Transducer
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