Question 1 All pressure measurements are made against a refe

Question 1

All pressure measurements are made against a reference pressure. The reference pressure for psig is _____.

a.       a vacuum

b.       atmospheric pressure

c.       0 inches of water column

d.       100 inches of water column

Question 2

If none of the detectors in a level measurement system are in contact with the measurement material, the system is described as _____.

a.       displacing

b.       inferential

c.       noninvasive

d.       resistive

Question 3

A barometer reading can be taken from a liquid column gauge.

a.       True

b.       False

Question 4

A compressor in a refrigerator converts a freon gas into a liquid.

a.       True

b.       False

Question 5

A rotameter can be used to provide a feedback signal for closed-loop control.

a.       True

b.       False

Question 6

Flow rates of solids are determined by measuring the weight on a specified length of a conveyer belt during a given time period.

a.       True

b.       False

Question 7

With an ultrasonic sensor, _____ is developed at its output when it measures the minimum level.

a.       0 mA

b.       4 mA

c.       10 mA

d.       20 mA

Question 8

The unit of measure which represents viscosity is called the _____.

a.       centimeter

b.       poise

c.       density

d.       weight

Question 9

If a liquid is removed from an enclosed container, the pressure on _____.

a.       the inside wall of the container is less than the pressure exerted on the outside wall

b.       the inside wall of the container is more than the pressure exerted on the outside wall

c.       both sides of the container\'s walls will remain the same

Question 10

A _____ is capable of accurately measuring temperatures from a distance.

a.       RTD

b.       thermistor

c.       thermocouple

d.       pyrometer

Question 11

Molecular movement stops when _____ is reached.

a.       0 degrees C

b.       0 degrees F

c.       absolute zero

d.       none of the above

Question 12

In a differential pressure flow meter, the velocity of a fluid leaving the orifice plate is _____ the fluid that approaches it.

a.       less than

b.       greater than

c.       the same as

Question 13

A pyrometer that measures radiant energy at two different wavelengths is the _____ pyrometer.

a.       broadband

b.       optical

c.       ratio

d.       dual color

Question 14

Positive displacement flow meters are physically rotated by the fluid to develop the readings.

a.       True

b.       False

Question 15

When a pressure transducer is connected to the bottom of a vessel for the purpose of measuring level, what is the actual variable being measured?

a.       level, directly

b.       differential pressure

c.       hydrostatic head pressure

d.       volume

Question 16

Pressure is measured as a force per unit of _____.

a.       volume

b.       time

c.       area

d.       mass

Question 17

The method of measuring one variable to determine the value of another is referred to as _____.

a.       the conversion method

b.       an inferred measurement

c.       a translation measurement

Question 18

_____ are classified as fluids.

a.       Liquids

b.       Gasses

c.       Vapors

d.       All of the above

Question 19

The level of a material can be determined by measuring the weight of the contents in a pressurized container.

a.       True

b.       False

Question 20

An increased thermocouple output voltage can be obtained by wiring two or more thermocouples in parallel.

a.       True

b.       False

Question 21

There are _____ resistive pressure elements in the bridge circuit of a semiconductor strain gauge.

a.       1

b.       2

c.       3

d.       4

Question 22

Which of the following terms identify the unit of measurement for flow?

a.       velocity

b.       differential pressure

c.       volumetric flow rate

Question 23

The low atmospheric pressure that exists on a stormy day will have a different effect on an open container hydrostatic pressure reading than when a high atmospheric pressure exists on a clear day.

a.       True

b.       False

Question 24

The term _____ is commonly used to describe the height of a liquid in a container above the measuring point.

a.       specific gravity

b.       head

c.       atmosphere

d.       density

Question 25

The _____ type of flow meter is the most common type of meter to measure the volume of fluid that flows.

a.       differential pressure

b.       positive displacement

c.       velocity

Question 26

Solids that float on liquids are referred to as _____.

a.       foam

b.       buoyants

c.       slurry

d.       contaminants

Question 27

A rodgauge provides an inferred measurement for level.

a.       True

b.       False

Question 28

A gas can be a vapor, steam, or air from the atmosphere.

a.       True

b.       False

Question 29

In thermocouple circuits, cold junction compensation is used to eliminate error due to the effects of _____.

a.       hysteresis

b.       dead band

c.       ambient temperature

d.       open circuits

Question 30

The process by which thermal energy is transferred by a solid is called _____.

a.       convection

b.       conductance

c.       radiation

Solution

1 b

2b

3a

4b

8b

10d

11c

12b

14a

15c

16c

18d

22b

24b

25a

26b

28b

30b

above answers are right but which i have left them because am not sure