# MCQs on Liquid Flow Sensors

1 - Question

What is the flow rate of a liquid flowing through a cylindrical pipe of cross section area 0.5m2 and velocity of the liquid is 0.5m/s?
a) 0.5
b) 0.75
c) 0.25
d) 1
Explanation: Given: Cross section area=0.5 m2 Velocity of the liquid=0.5 m/s Flow rate=Cross section area*Velocity of the liquid Flow rate=0.5*0.5=0.25m3/s

2 - Question

What is the flow rate of a liquid flowing through a cylindrical pipe of radius 0.2 m and velocity of the liquid is 0.6m/s?
a) 0.5
b) 0.07536
c) 0.0157
d) 0.0628
Explanation: Given: Radius(r)=0.1m Cross section area=pi*r2 Cross section area=3.14*(0.2)2 => 0.1256 Velocity of the liquid=0.6m/s Flow rate=Cross section area*Velocity of the liquid Flow rate=0.1256*0.6 => 0.07536m3/s

3 - Question

What is the flow rate of a liquid flowing through a cylindrical pipe of radius 0.1 m and velocity of the liquid is 0.5m/s?
a) 0.5
b) 0.75
c) 0.0157m3/s
d) 1
Explanation: Given: Radius(r)=0.1m Cross section area=pi*r2 Cross section area=3.14*(0.1)2=>0.0314 Velocity of the liquid=0.5 m/s Flow rate= Cross section area*Velocity of the liquid Flow rate=0.0314*0.5 => 0.0157m3/s advertisement

4 - Question

What is the SI unit of volumetric flow rate?
a) m2/s
b) m3/s
c) m/s
d) m3/s2
Explanation: m3/s is the SI unit of volumetric flow rate, where “m” and “s” denotes meter and seconds respectively. Volumetric flow rate represents the rate at which a particular volume of fluid flows through a cross section area in 1 second.

5 - Question

High turbidity is bad for aquatic life.
a) True
b) False
Explanation: High turbidity is bad for aquatic life. Turbidity refers to the amount of sediments present in the water. High turbidity can block the sunlight which is essential for the aquatic plants to live. The turbidity contains several pathogens which may be harmful for the aquatic life.

6 - Question

Ultrasonic flow meter works on Doppler Effect.
a) True
b) False
Explanation: Ultrasonic flow meter works on Doppler Effect. Ultrasonic flow meters are generally used for monitoring dirty water such as sewage waste water. It can detect large suspended particles and bubbles flowing through the channel.

7 - Question

Which is a gas flow meter?
a) MSP430G2ET
b) CMCP793V-500
c) FLUXUS G601
d) FMA-PC16
Explanation: FLUXUS G601 is a gas flow meter. FMA-PC16 is a mass flow meter. MSP430G2ET is a development board manufactured by the “TEXAS INSTRUMENTS” and CMCP793V-500 is a velocity sensor.

8 - Question

What is the flow rate of a liquid flowing through a cylindrical pipe of radius 0.2 m and velocity of the liquid is 0.5 m/s?
a) 0.5
b) 0.75
c) 0.0157
d) 0.0628
Explanation: Given: Radius(r)=0.1m Cross section area=pi*r2 Cross section area=3.14*(0.2)2=>0.1256 Velocity of the liquid=0.5 m/s Flow rate= Cross section area*Velocity of the liquid Flow rate=0.1256*0.5=>0.0628m3/s

9 - Question

What is the flow rate of a liquid flowing through a cylindrical pipe of cross section area 0.2m2 and velocity of the liquid is 0.5 m/s?
a) 0.5
b) 0.75
c) 0.25
d) 0.1
Explanation: Given: Cross section area=0.2m2 Velocity of the liquid=0.5m/s Flow rate=Cross section area*Velocity of the liquid Flow rate=0.2*0.5=0.1m3/s

10 - Question

Which is a mass flow meter?
a) MSP430G2ET
b) CMCP793V-500
c) SLB700A/06VA
d) FMA-PC16
Explanation: FMA-PC16 is a mass flow meter. SLB700A/06VA is an example of force sensor. MSP430G2ET is a development board manufactured by the “TEXAS INSTRUMENTS” and CMCP793V-500 is a velocity sensor.

11 - Question

Which liquid has lowest density?
a) Acetic acid
b) Pure water
c) Olive oil
d) Sea Water
Explanation: Olive oil has lowest density. Its density is 911kg/m3. Pure water has a density of 1000 kg/m3 and Sea Water has a density of 1022 kg/m3. Acetic acid has the highest density among the four, with a density of 1049 kg/m3.

12 - Question

Which liquid will have more mass for same amount of volume?
a) Brine
b) Chloroform
c) Olive oil
d) Sea Water
Explanation: We know density=mass/volume Since volume is constant so, mass is directly proportional to liquid. Therefore the liquid with highest density has the highest mass. Olive oil has density is 911 kg/m3. Sea Water has a density of 1022kg/m3. Brine has a density of 1230kg/m3. Chloroform has the highest density among the four, with a density of 1489 kg/m3. Therefore chloroform will have the highest mass.

13 - Question

Which liquid will have more mass for same amount of volume?
a) Coconut oil
b) Phosgene
c) Castor oil
d) Sea Water
Explanation: We know density=mass/volume Since volume is constant so, mass is directly proportional to liquid. Therefore the liquid with highest density has the highest mass. Castor oil has density is 952 kg/m3. Sea Water has a density of 1022kg/m3. Coconut oil has a density of 930kg/m3. Phosgene has the highest density among the four, with a density of 1378kg/m3. Therefore Phosgene will have the highest mass.

14 - Question

Which is a Liquid flow sensor?
a) SLF3X
b) CMCP793V-500
c) SLB700A/06VA
d) FMA-PC16
Explanation: SLF3X is a Liquid flow sensor. It is durable, stable and provides long time durability for various applications. FMA-PC16 is a mass flow meter. SLB700A/06VA is an example of force sensor. CMCP793V-500 is a velocity sensor.

15 - Question

What is the SI unit of flow rate of a Liquid or fluid?
a) m3/s
b) m2/s
c) m/s
d) m3/s2