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Mechanical Engineering Exam  >  Mechanical Engineering Tests  >  GATE Mechanical (ME) Mock Test Series 2025  >  Test: Pressure & Its Measurements, Reciprocating Pumps, Flow Around Submerged Bodies - Drag & Lift - 1 - Mechanical Engineering MCQ

Test: Pressure & Its Measurements, Reciprocating Pumps, Flow Around Submerged Bodies - Drag & Lift - 1 - Mechanical Engineering MCQ


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15 Questions MCQ Test GATE Mechanical (ME) Mock Test Series 2025 - Test: Pressure & Its Measurements, Reciprocating Pumps, Flow Around Submerged Bodies - Drag & Lift - 1

Test: Pressure & Its Measurements, Reciprocating Pumps, Flow Around Submerged Bodies - Drag & Lift - 1 for Mechanical Engineering 2024 is part of GATE Mechanical (ME) Mock Test Series 2025 preparation. The Test: Pressure & Its Measurements, Reciprocating Pumps, Flow Around Submerged Bodies - Drag & Lift - 1 questions and answers have been prepared according to the Mechanical Engineering exam syllabus.The Test: Pressure & Its Measurements, Reciprocating Pumps, Flow Around Submerged Bodies - Drag & Lift - 1 MCQs are made for Mechanical Engineering 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Pressure & Its Measurements, Reciprocating Pumps, Flow Around Submerged Bodies - Drag & Lift - 1 below.
Solutions of Test: Pressure & Its Measurements, Reciprocating Pumps, Flow Around Submerged Bodies - Drag & Lift - 1 questions in English are available as part of our GATE Mechanical (ME) Mock Test Series 2025 for Mechanical Engineering & Test: Pressure & Its Measurements, Reciprocating Pumps, Flow Around Submerged Bodies - Drag & Lift - 1 solutions in Hindi for GATE Mechanical (ME) Mock Test Series 2025 course. Download more important topics, notes, lectures and mock test series for Mechanical Engineering Exam by signing up for free. Attempt Test: Pressure & Its Measurements, Reciprocating Pumps, Flow Around Submerged Bodies - Drag & Lift - 1 | 15 questions in 60 minutes | Mock test for Mechanical Engineering preparation | Free important questions MCQ to study GATE Mechanical (ME) Mock Test Series 2025 for Mechanical Engineering Exam | Download free PDF with solutions
Test: Pressure & Its Measurements, Reciprocating Pumps, Flow Around Submerged Bodies - Drag & Lift - 1 - Question 1
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Which one of the following pairs is not correctly matched? 

Detailed Solution for Test: Pressure & Its Measurements, Reciprocating Pumps, Flow Around Submerged Bodies - Drag & Lift - 1 - Question 1

Ans. (d) External diffuser is creating centrifugal head.

Test: Pressure & Its Measurements, Reciprocating Pumps, Flow Around Submerged Bodies - Drag & Lift - 1 - Question 2
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If a reciprocating pump having a mechanical efficiency of 80% delivers water at the rate of 80 kg/s with a head of 30 m, the brake power of thepump is: 

Detailed Solution for Test: Pressure & Its Measurements, Reciprocating Pumps, Flow Around Submerged Bodies - Drag & Lift - 1 - Question 2

Ans. (a)

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Test: Pressure & Its Measurements, Reciprocating Pumps, Flow Around Submerged Bodies - Drag & Lift - 1 - Question 3
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A ping-pong ball, having a diameter of 3.6 cm and weighing 2.4 g is served with a horizontal velocity of 10 m/sec and a spin that gives rise to a coefficient of lift of 0.2. Assuming the density of air to be 0.00129 gf/cc, the lift experienced by the ball is nearly

*Answer can only contain numeric values
Test: Pressure & Its Measurements, Reciprocating Pumps, Flow Around Submerged Bodies - Drag & Lift - 1 - Question 4
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An inverted U-tube manometer is used to measure the pressure difference between two pipes A and B, as shown in the figure. Pipe A is carrying oil(specific gravity=0.8) and pipe B is carrying water. The densities of air and water are 1.16 kg/m3 and 1000 kg/m3, respectively. The pressure difference between pipes A and B is _____kPa.
Acceleration due to gravity:g = 10 m/s2 

Detailed Solution for Test: Pressure & Its Measurements, Reciprocating Pumps, Flow Around Submerged Bodies - Drag & Lift - 1 - Question 4

Given data:
specific gravity of oil
Soil=0.8
∴ ρoil=0.8×1000=800kg/ m3
density of air : ρair=1.16kg/ m3
Density of water ,
ρw=1000kg/ m3
Acceleration due to gravity.
g=10m/ s2
h1=80mm=0.08m
h2=200mm=0.2m
h3=100mm=0.1m
pressure at section 1 on left limb =Pressure at section 1 on right limb
PA−ρoilgh2−ρairgh1=PB−ρw(h1+h2+h3)
PA−800×10×0.2−1.16×10×0.08=PB−1000×10(0.08+0.2+0.1)
PA−1600−0.928=PB−3800
or PA−PB=−2199.07Pa
= -2.199 kPa

Test: Pressure & Its Measurements, Reciprocating Pumps, Flow Around Submerged Bodies - Drag & Lift - 1 - Question 5
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What will be the discharge of a single-acting pump if it has one cylinder of area 0.5 m2 and stroke of length 20 cm and if the pump has 180 rpm of speed?
Test: Pressure & Its Measurements, Reciprocating Pumps, Flow Around Submerged Bodies - Drag & Lift - 1 - Question 6
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A single-acting reciprocating pump has a 15 cm piston with a crank radius of 15cm. The delivery pipe is 10 cm in diameter. At a speed of 60 rpm, 310 litres/minute of water is lifted to a height of 15 cm. Find the coefficient of discharge.
Test: Pressure & Its Measurements, Reciprocating Pumps, Flow Around Submerged Bodies - Drag & Lift - 1 - Question 7
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Consider the following coefficients: (Re = Reynolds number)
1. 1.328 Re_ (0.5) for laminar flow
2. 2.072 Re_ (0.2) for turbulent flow
3. 0.072 Re _ (0.2) for turbulent flow
4. 1.028 Re _ (0.5) for laminar flow
The coefficient of drag for a flat would include
Detailed Solution for Test: Pressure & Its Measurements, Reciprocating Pumps, Flow Around Submerged Bodies - Drag & Lift - 1 - Question 7

Ans. (c)

Test: Pressure & Its Measurements, Reciprocating Pumps, Flow Around Submerged Bodies - Drag & Lift - 1 - Question 8
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An automobile moving at a velocity of 40 km/hr is experiencing a wind resistance of 2 kN. If the automobile is moving at a velocity of 50 km/hr,the power required to overcome the wind resistance is:  
Detailed Solution for Test: Pressure & Its Measurements, Reciprocating Pumps, Flow Around Submerged Bodies - Drag & Lift - 1 - Question 8

Ans. (a) Power,




= 43.4 kw

Test: Pressure & Its Measurements, Reciprocating Pumps, Flow Around Submerged Bodies - Drag & Lift - 1 - Question 9
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Improved streaming produces 25% reduction in the drag coefficient of a torpedo. When it is travelling fully submerged and assuming the driving power to remain the same, the crease in speed will be:
Detailed Solution for Test: Pressure & Its Measurements, Reciprocating Pumps, Flow Around Submerged Bodies - Drag & Lift - 1 - Question 9

Ans. (a)

Test: Pressure & Its Measurements, Reciprocating Pumps, Flow Around Submerged Bodies - Drag & Lift - 1 - Question 10
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A parachutist has a mass of 90 kg and a projected frontal area of 0.30m2 in free fall. The drag coefficient based on frontal area is found to be 0.75. If the air density is 1.28 kg/m3, the terminal velocity of the parachutist will be:  
Detailed Solution for Test: Pressure & Its Measurements, Reciprocating Pumps, Flow Around Submerged Bodies - Drag & Lift - 1 - Question 10

Ans. (b)
Total Drag (FD) = Weight (W)
or 

Test: Pressure & Its Measurements, Reciprocating Pumps, Flow Around Submerged Bodies - Drag & Lift - 1 - Question 11
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A cube of edge length 0.5 m is floating in water with 40% of its volume submerged. The density of the cube is:
Detailed Solution for Test: Pressure & Its Measurements, Reciprocating Pumps, Flow Around Submerged Bodies - Drag & Lift - 1 - Question 11
Fraction submerged = Density of cube / Density of water. Hence, density of cube = 0.4 × 1000 = 400 kg/m³.
Test: Pressure & Its Measurements, Reciprocating Pumps, Flow Around Submerged Bodies - Drag & Lift - 1 - Question 12
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A submarine is submerged at a depth H below the surface of the ocean where the absolute pressure is measured to be 5.5 MPa. The density of seawater is 1025 kg/m³, atmospheric pressure is 101 kPa, and g = 9.81 m/s². What is the depth H? (Round off to the nearest integer)
Detailed Solution for Test: Pressure & Its Measurements, Reciprocating Pumps, Flow Around Submerged Bodies - Drag & Lift - 1 - Question 12
Absolute pressure = Atmospheric pressure + ρgh5.5 × 10⁶ = 101 × 10³ + 1025 × 9.81 × HH = (5.5 × 10⁶ − 101 × 10³) / (1025 × 9.81) ≈ 520 m.
Test: Pressure & Its Measurements, Reciprocating Pumps, Flow Around Submerged Bodies - Drag & Lift - 1 - Question 13
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A cylindrical tank of radius 1 m and height 2 m is filled with oil of density 850 kg/m³. The hydrostatic force on the bottom surface is:
Detailed Solution for Test: Pressure & Its Measurements, Reciprocating Pumps, Flow Around Submerged Bodies - Drag & Lift - 1 - Question 13
Force = Pressure × Area = (ρgh) × (πr²)= (850 × 9.81 × 2) × (π × 1²) ≈ 16.7 kN.
Test: Pressure & Its Measurements, Reciprocating Pumps, Flow Around Submerged Bodies - Drag & Lift - 1 - Question 14
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A mercury barometer reads 760 mm Hg. If the local gravity increases by 1%, what will be the new height of the mercury column? (Assume the density of mercury and atmospheric pressure remain constant)
Detailed Solution for Test: Pressure & Its Measurements, Reciprocating Pumps, Flow Around Submerged Bodies - Drag & Lift - 1 - Question 14
Height ∝ 1/g. If g increases by 1%, height decreases by 1%.New height = 760 × (1 − 0.01) = 752 mm.
Test: Pressure & Its Measurements, Reciprocating Pumps, Flow Around Submerged Bodies - Drag & Lift - 1 - Question 15
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A square gate of 3 m × 3 m is submerged vertically in water. The top edge is at 2 m below the surface. The hydrostatic force on the gate is:
Detailed Solution for Test: Pressure & Its Measurements, Reciprocating Pumps, Flow Around Submerged Bodies - Drag & Lift - 1 - Question 15
Force = ρgA(h₁ + h₂)/2 = (1000 × 9.81 × 3 × 3) × (2 + 5.5)/2 ≈ 176.6 kN.
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