AIPD SUBCOURSE NUMBER SM0486
MECHANICAL AND ELECTOR-MECHANICAL MEASUREMENT PRINCIPLES
EXERCISES FOR LESSON 2
The major difference between mass and weight is that
the weight of a body is not constant.
mass is measured in dynes and weight in grams or pounds.
gravity affects mass inversely with the square of the distance.
at an acceleration of 32 ft./sec/sec the enertia of a 5-lbs. weight is
twice that of a 10-lbs. weight.
Pressure applied to an enclosed fluid is
exerted in the direction of piston travel.
exerted equally in all directions with a loss.
at right angles to the applied force.
equal in all directions without loss.
You have a hydraulic press which has a hose piston area of 3 in2 and a
movable piston area of 24 in2.
What is the total upward force (pressure)
generated by the movable piston with 20 pounds applied?
Atmospheric pressure at sea level is approximately
760 cm of mercury.
76 in of water.
76 cm of mercury.
30 cm of water.
The barometer at your station indicates 29.3 inches.
The altitude at this
local is approximately