Assignment 4
Textbook Assignment:
Measurement and Pressure Control Devices, Chapter 8:
Reservoirs, Strainers, Filters, and Accumulators, chapter 9;
and Actuators, chapter 10.
4-1.
4-2.
Learning Objective:
Recognize
the construction, operational
characteristics, and uses of
different types of fluid pressure
indicators,
thermometers, and
control switches.
The pressure sensing elements of
Bourdon-tube gauges are commonly
made in which of the following
shapes?
1.
The letter C
2.
Helical
3.
Spiral
4.
All of the above
Which, if any, of the following
statements correctly explains the
action of a C-shaped Bourdon
tube?
1.
2.
3.
4.
Centrifugal force of fluid
flowing through the curved
tube causes it to straighten
out
Pressure applied to the tube
causes its cross section to
become more circular, causing
It to straighten out
Pressure applied to the tube
causes its cross section to
become more circular, causing
it to contract
None of the above
4-3.
A duplex Bourdon gauge is
composed of
1.
one indicator dependent upon
both of two separate
mechanisms
2.
two separate and independent
mechanisms and indicators
3.
one mechanism with one
indicator showing current
pressure and a second
indicator showing the maximum
pressure reached
4.
one mechanism with one
indicator showing pressure in
pounds per square inch (psi)
and a second indicator
showing the load on a ram in
tons
4-4.
A Bourdon-tube differential
pressure gauge is composed of
1.
one indicator dependent upon
both of two separate
mechanisms
2.
two separate and independent
mechanisms and indicators
3.
one mechanism with one
indicator showing current
pressure and the second
indicator showing the maximum
pressure reached
4.
one mechanism with one
indicator which can register
pressure either above or
below atmospheric pressure
4-5.
Which of the following gauges can
be used to measure the
differential pressure across a
strainer?
1.
Duplex gauge
2.
Differential pressure gauge
3.
Both 1 and 2 above
4.
Compound gauge
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