Answer the following statement(s) true (T) or false (F)
1. The value of fluid bulk modulus shows how easily the volume of the fluid can be reduced when the pressure acting on it is increased.
2. The modulus of rigidity is a measure of how easily a material can be twisted or sheared.
3. Linear impulse represents the net effect of a force acting over a period of time and brings about a change in the linear momentum of the object.
4. Mechanics deals with the study of behavior of objects or structural members when subjected to forces.
1. True
2. True
3. True
4. True
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If the length of a crankshaft throw was changed either up or down, which of the following would be directly affected?
A. engine torque B. engine rpm C. engine noise D. engine vibration
?Why is the root pass weld started on top of a tack weld?
A. ?To eliminate the potential lack of fusion. B. ?To prevent porosity caused by the lack of shielding gas at the instant the weld starts. C. ?So the arc light will show the root opening and make it easier to get aligned with the root opening as the weld moves off of the tack weld. D. ?The root pass can be started anywhere it is comfortable for the welder to begin welding.
The United States Environmental Protection Agency regulates the amount of sewage sludge that can be applied on agricultural land by setting limits on:
A) the concentrations of metals in the sludge to be applied. B) the total accumulative amount of metals that can be applied to a parcel of land, regardless of when the metals are applied. C) the rate of metal application to any parcel of land in any one year. D) all of the above E) none of the above