Test Your knowledge on Basics of Instrumentation – Online Quiz

Welcome to your Basics of Instrumentation.
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1.

Working Principle of Pressure measurement in gauge involves..........

a. Seebeck effect

b. Coriolis effect

c. Bourdon Gauge

d. Wheatstone bridge

None

2.

Working Principle of Thermocouple ........

a. Seebeck effect

b. Coriolis effect

c. Wheatstone bridge

d. Pareto Effect

None

3.

Which one of the following Flow meter is a Head Type?

a. Ultrasonic

b. Coriolis

c. Turbine Meter

d. Venturi

None

4.

Permanent Head Loss is less in

a. Venturi Meter

b. Orifice Meter

None

5.

Averaging Pitot (Annubar) has

a. Low Accuracy

b. High Accuracy

None

6.

For LPG Mass flow measurement preferred instrument is .........

a. Orifice Meter

b. Coriolis

c. Venturi

d. Magnetic

None

7.

In Which type of Control - Output of one controller goes as set point to the another controller which controls the Control Valve

a. Feedback control

b. Feed Forward Control

c. Cascade Control

d. All of the above

None

8.

What are the Compensations given for any flow meter for liquid flow measurement operating at the process condition different from the design ......

a. Pressure

b. Temperature

c. Specific Gravity

d. Molecular Weight

e. All of the above

None

9.

Bubble Tube Purge for Level Measurement is used for level measurement in ....

a. Ashphalt

b. Diesel

None

10.

Wet Leg measurement is used in ......

a. Condensing Liquid Level Measurement

b. No Condensing Liquid Level Measurement

None

11.

Advantages of External Level Bridle is

a. Can be useful to reduce Weld joints in vessel

b. Can be useful in installing multiple level measurement devices

c. Can be useful in lined or cladded or stress relieved vessels

d. All of the above

e. None of the above

None

12.

Float gauges in Tanks are replaced with ......

a. Magnetic Gauge

b. Radar Tank Gauge

c. Gauge Glass

d. Level Switch

None

13.

Duplex Thermocouple has …………………. Number of Thermowell(s)

a. One

b. Two

None

14.

An Example for Non-contact type temperature measuring device.........

a. Thermocouple

b. RTD

c. Skin Thermocouple

d. Optical Pyrometer

None

15.

Three Elements used in Boiler Steam Drum Level Control are..........

a. Steam Flow, Steam Pressure, Steam Temperature

b. Feed Water Flow, Drum Level, Steam Flow

c. Feed Water Pressure, Drum Level, Feed Water Flow

d. Drum Level, Feed Water Pressure, Steam Pressure

None

16.

The best option for controlling the LP steam Header pressure in a steam header network is ............

a. Split Range Control with Reduced Pressure Control by admitting steam from HP Steam Header and Back Pressure Control be venting excess steam from LP steam header

b. Back Pressure Control be venting excess steam from LP steam header

c. Reduced Pressure Control by admitting steam from HP Steam Header

d. None of the above

None

17.

What type of control is employed in the following scenario?

Fired heater outlet temperature is controlled by varying the flow in the fuel gas line.

a. Feedback control

b. Feed Forward Control

c. Cascade Control

d. All of the above

None

18.

For Air blower suction, the preferred control valve type is

a. Cage Valve

b. Ball Valve

c. Double Seated Valve

d. Butterfly Valve

None

19.

Volume tank in the control valve is used in

a. All the Control Valves

b. In Valves that require a back up in case loss of instrument air supply

None

20.

Which one of the following Control Valve is not suitable for Tight Shut off Application?

a. Gate Valve

b. Ball Valve

c. Diaphragm Valve

d. Butterfly Valve

None

21.

Which one of the following Control Valve Characteristic is preferred in frequent On-Off Service?

a. Linear

b. Equal Percentage

c. Quick Opening

d. Any one of the Above

e. None of the Above

None

22.

Which one of the Control Valve leakage Class has low leakage? .....

a. ANSI Class I

b. ANSI Class II

c. ANSI Class III

d. ANSI Class IV

None

23.

Erosion in control vale is minimised by Hard facing the trim of the control valve with .......

a. Stellite

b. Tungsten carbide

c. Both A & B

d. None of the Above

None

24.

Which one of the following is used in Control Valve where a specific valve/actuator action is required when supply pressure falls below a specific value? ..........

a. Solenoid

b. Trip Valve

c. I/P Transducer

d. Actuator

None

25.

High and Low selector is used in ........

a. Fuel/ Air Ratio Control

b. Boiler Drum Level Control

c. Tower Temperature Control

d. Bottom Level Control

None