Controls- Part B

Question 1

The three primary reasons for sending and measuring variables are to

Answer 1

Indicate record and control

Question 2

The fore main typed of measured variables are

Answer 2

Liquid level temp pressure and flow rate

Question 3

To protect thermometer and other sencing bulbs from high external pressure and possible damage,_______ are installed in pressure vessels and pipe

Answer 3

Thermoweld

Question 4

The_________ ________ ______ produces a longer scale of measurement then other types so a more accurate reading can be take

Answer 4

Inclined tube manometer

Question 5

_______or _______ to be applied to the gauge ID connected to the housing that encloses the diaphragm

Answer 5

Pressure or vacuum

Question 6

As a result, the _______ rises and falls with the liquid level and this movement can be used to operate a control valve

Answer 6

Float

Question 7

An _______ is the most common form of restriction used to measure flow

Answer 7

Orifice plate

Question 8

The term ________ ________ is explained as the point where the area is at a minimum size; therefore the fluid is at its highest Velocity and lowest pressure

Answer 8

Vena contracta

Question 9

______ ______ sense impact and static pressure at the same instant.

Answer 9

Pito tube

Question 10

On a small system, a______ ______ ______ located in the compressor room supplies reduced pressure to the entire control system.

Answer 10

Pressure reducing station

Question 11

The _______ _____ filter is to prevent dust or other airborne contaminants from entering the intake valves of the compressor.

Answer 11

Air filter

Question 12

The compressor oil must be the type recommended by the _______ manufacturer to maintain the life of the compressor and the warranty

Answer 12

Manufacturer

Question 13

Limiting _________ in compressed air piping is of the utmost importance

Answer 13

Moisture

Question 14

Another type of dryer involves the use of ______ or chemical to remove moisture from the control air

Answer 14

Desiccant

Question 15

The______ ______ is located in the piping between the compressor and pressure- reducing valve

Answer 15

Moisture condenser

Question 16

The _______ _______ has been decreased in the system thereby reducing the amount of water deposited throughout the system

Answer 16

Air temperature

Question 17

Precautions should be made when working moving equipment;________ and _____ procedures should be followed

Answer 17

Tag and lock

Question 18

When troubleshooting the sensing and measuring variables, you would be primarily concerned with.

Answer 18

Primary element

Question 19

A thermometer is really designed to measure

Answer 19

Molecular movement

Question 20

When a pressure gauge is located on the process piping, it is classified as

Answer 20

Integral mounted

Question 21

The sending element normally used in a pressure gauge is

Answer 21

Bourbon tube

Question 22

The thermoelectric promoter temperature uses.

Answer 22

DC millivolts

Question 23

Floats can control, indicate, or record events; this liquid level device is based on the laws of

Answer 23

Buoyancy laws

Question 24

The only type of flow measuring device that accurately measures volume is the

Answer 24

Positive displacement type

Question 25

When installing an orifice plate between a pair of orifice flanges, the stamped face is normally installed.

Answer 25

Upstream of flow

Question 26

Which flow sensing device will handle more flow with less pressure drop

Answer 26

Pilot tube

Question 27

The type of water this is mainly used ad an indicating device is the

Answer 27

Rota meter

Question 28

Moisture is introduced into the pneumatic control system from the

Answer 28

Intake filter

Question 29

The air compressor is controlled by a

Answer 29

Pressure switch

Question 30

The aftercooler is located

Answer 30

Before the receiver

Question 31

Lubrication should remain in the

Answer 31

Compressor

Question 32

The type of air drying technique that uses a cooling tower is

Answer 32

Moisture condenser

Question 33

The building type that would require the most ridged HVAC standards is an

Answer 33

Hospital

Question 34

The primary noises transmitted from the compressor are caused by.

Answer 34

Vibration

Question 35

They type of pipe or tubing found on a large pneumatic instrumentation system is

Answer 35

Galvanized pipe

Question 36

Before filling and testing a system that contains float type meters. You should

Answer 36

Install plugs

Question 37

Each control balv4 should have a

Answer 37

ID tag