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WorksheetsQuiz 3 Set 1
Total questions: 15
Worksheet time: 19mins
Name
Class
Date
1.
1.Which of the following describes a laminar flow in a pipe?
a)
Fluid layers cross each other and do not move parallel to each other.
b)
Fluid flow generally occurs at high velocity.
c)
Fluid layers move parallel to each other and do not cross each other.
d)
Fluid motion is random and chaotic.
2.
2.The Bernoulli's Principle explains the reduction in pressure when a fluid's speed increases. Which pair of flow measurement instruments directly applies this principle to measure flow rate?
a)
Piston Meter and Turbine Meter.
b)
Pitot Tube and Rotameter.
c)
Venturi Meter and Orifice Meter.
d)
Magnetic Flow Meter and Ultrasonic Flow Meter.
3.
3.Water flows through a pipe with a cross-sectional area of 0.04 m2 at an average velocity of 5.0 m/s. Calculate the volumetric flow rate (Q) in m3/s.
a)
0.80 m3/s
b)
0.20 m3/s
c)
2.50 m3/s
d)
0.02 m3/s
4.
4.A pipe with an initial diameter (D1) of 20 cm carries water at an average velocity (V1) of 3.0 m/s. If the pipe narrows to a diameter (D2) of 10 cm, what is the new average velocity (V2) of the water?
a)
6.0 m/s
b)
1.5 m/s
c)
12.0 m/s
d)
4.5 m/s
5.
5.A pump delivers a volumetric flow rate (Q) of 0.5 m3/s of oil. If the oil has a density (ρ) of 850 kg/m3, calculate the mass flow rate (m˙) in kg/s.
a)
1700 kg/s
b)
425 kg/s
c)
850.5 kg/s
d)
0.000588 kg/s
6.
6.How is mass flow rate (m˙) related to volumetric flow rate (Q)?
a)
m˙=Q/Density
b)
m˙=Q×Velocity
c)
m˙=Q×Area
d)
m˙=Q×Density
7.
7.In a horizontal Venturi meter, a constant density fluid flows from a wide pipe to a narrow throat. If a pressure sensor measures a negative differential pressure (Pthroat−Ppipe<0), what must happen to the fluid's velocity to satisfy the Continuity and Bernoulli's Principles?
a)
The fluid is decelerating, and the pressure Pthroat is greater than Ppipe.
b)
The total energy of the fluid is increasing due to the narrowing.
c)
The fluid is accelerating (vthroat>vpipe), and the resulting increase in kinetic energy causes a drop in static pressure (Pthroat<Ppipe).
d)
The volumetric flow rate must decrease, as the pressure is dropping.
8.
8.A fluid passes through a pipe restriction (like an Orifice Plate). According to Bernoulli's principle, the Kinetic Energy term (21ρv2) must increase at the restriction. Assuming a horizontal pipe and negligible friction, what must happen to the Pressure Energy term (P) to ensure the total energy sum is conserved?
a)
The pressure energy term (P) must increase to maintain a constant total sum.
b)
The pressure energy term (P) must remain the same since the fluid is the same.
c)
The pressure energy term (P) must decrease to compensate for the increase in kinetic energy.
d)
The gravitational potential energy term (ρgh) must increase.
9.
9.Which of the following is the standard SI unit for pressure?
a)
Pounds per square inch (psi)
b)
Bar
c)
Torr
d)
Pascal (Pa)
10.
10.Absolute pressure is defined as the pressure measured with respect to what reference point?
a)
Atmospheric pressure.
b)
Gauge pressure.
c)
Total vacuum (absolute zero pressure).
d)
Standard sea level pressure (1 atm).
11.
11.In the formula for differential pressure measurement using a U-tube manometer, ΔP=ρgh, what does the variable ρ represent?
a)
The fluid's kinematic viscosity.
b)
The density of the fluid being measured.
c)
The density of the manometric (indicating) fluid.
d)
The acceleration due to gravity.
12.
12.What type of pressure measurement is often referred to as 'negative gauge' and is indicated by an amount below atmospheric pressure?
a)
Absolute Pressure
b)
Positive Gauge Pressure
c)
Vacuum Pressure
d)
Hydrostatic Pressure
13.
13.A pressure sensor reads a Gauge Pressure (Pgauge) of 350 kPa. Given that the Atmospheric Pressure (Patm) is 101 kPa, calculate the Absolute Pressure (Pabs) of the system.
a)
249 kPa
b)
350 kPa
c)
451 kPa
d)
101 kPa
14.
14.A U-tube manometer filled with a fluid of density (ρ) of 13600 kg/m3 shows a height difference (h) of 5 cm when measuring a pressure difference (ΔP). Calculate the pressure difference in Pascals (Pa). (Use g=9.81 m/s2).
a)
6800 Pa
b)
6671 Pa
c)
13600 Pa
d)
680 Pa
15.
15.In a Well-type Manometer, the standard operational approximation for pressure difference is ΔP≈ρgh. Why is this approximation valid when the ratio of the well area (A1) to the tube area (A2) is very large (i.e., A2/A1 is negligible)?
a)
The principle of fluid statics mandates that only the height of the column (h) matters.
b)
A large A2/A1 ratio means the fluid level change in the well (x) is equal to the change in the tube (h).
c)
The large area of the well ensures the fluid level change in the well (x) is insignificantly small and can be effectively ignored, simplifying the calculation to ΔP≈ρgh.
d)
The manometric fluid's density (ρ) is always much higher than the measured fluid's density, which is the only requirement for the simplified formula.
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