SM0486

AIPD SUBCOURSE NUMBER SM0486

MECHANICAL AND ELECTOR-MECHANICAL MEASUREMENT PRINCIPLES

EXERCISES FOR LESSON 2

1.

The major difference between mass and weight is that

a.

the weight of a body is not constant.

b.

mass is measured in dynes and weight in grams or pounds.

c.

gravity affects mass inversely with the square of the distance.

d.

at an acceleration of 32 ft./sec/sec the enertia of a 5-lbs. weight is

twice that of a 10-lbs. weight.

2.

Pressure applied to an enclosed fluid is

a.

exerted in the direction of piston travel.

b.

exerted equally in all directions with a loss.

c.

at right angles to the applied force.

d.

equal in all directions without loss.

You have a hydraulic press which has a hose piston area of 3 in2 and a

3.

movable piston area of 24 in2.

What is the total upward force (pressure)

generated by the movable piston with 20 pounds applied?

a.

120 pounds

c.

160 pounds

b.

1440 pounds

d.

20 pounds

4.

Atmospheric pressure at sea level is approximately

a.

760 cm of mercury.

c.

76 in of water.

b.

76 cm of mercury.

d.

30 cm of water.

5.

The barometer at your station indicates 29.3 inches.

The altitude at this

local is approximately

a.

90 feet.

c.

500 feet.

b.

630 feet.

d.

5000 feet.

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