Pressure | Sensing

Question 1

Pressure is measured against a ___

Answer 1

reference

Question 2

Aneroid means ____

Answer 2

without fluid

Question 3

Aneroid gauges use ___ pressure sensing elements which flex under pressure.

Answer 3

metallic

Question 4

The least sensitive pressure sensing equipment is a ___, whilst the most is a ___

Answer 4

diaphragm, manometer

Question 5

A diaphragm is a ____ which is corrugated for strength.

Answer 5

circular metal disk

Question 6

A diaphragm will detect ___ pressure

Answer 6

low

Question 7

One side of the diaphragm is exposed to the ___ ___ ___ ___, the other is linked to the indicating mechanism.

Answer 7

pressure to be measured

Question 8

Aneroid capsules are used in gauges for ___ measurements, or ___ pressure

Answer 8

small, absolute

Question 9

The aneroid capsule has a gear train and needle, which may be driven by an ___ and ___ ___. This is the aneroid.

Answer 9

enclosed, sealed chamber

Question 10

The aneroid sealed chamber is used as a reference pressure and the needles are driven by the ___ ___.

Answer 10

external pressure

Question 11

An aneroid capsule consists of two diaphragms placed face to face and joined at their edge to form a chamber that may be completely sealed or left open to a source of ___ ___.

Answer 11

absolute pressure

Question 12

The aneroid capsule can be used for fairly ___ pressures, but are ___ sensitive than diaphragms

Answer 12

low more

Question 13

Bellows are just several ___ joined together

Answer 13

unsealed capsules

Question 14

Bellows are used for ___ pressures than aneroids

Answer 14

higher

Question 15

The Bourdon Tube is an ___ hollow spring tube, sealed at one end, with the other connected to the ___ __ ___.

Answer 15

elliptical, source of pressure

Question 16

The pressure differential ___ the Bourdon tube

Answer 16

straightens

Question 17

The pressure range in the Bourdon tube is governed by tubing wall ___ and the ___ of the curvature.

Answer 17

thickness, radius

Question 18

The material of the Bourdon tube is ___ ___ to make it retain its original shape closely

Answer 18

spring tempered

Question 19

Most Bourdon tube gauges use ___ ___

Answer 19

phosphor bronze

Question 20

The Bourdon tube ___ with increasing pressure.

Answer 20

expands

Question 21

The Manometer refers to ___ ___ ___ instruments

Answer 21

liquid column hydrostatic

Question 22

___ is most commonly used in a Manometer, as a result of its high density and low vapour pressure

Answer 22

Mercury

Question 23

Manometers are used for ___ purposes

Answer 23

calibration

Question 24

In order of increasing sensitivity, pressure measuring equipment is ___

Answer 24

• Aneroid
• Bellows
• Bourdon Tube