6 : Substances undergoing plastic deformation until break are:
1 : Brittle Substance
2 : Ductile Substance
3 : Non-Magnetic Substance
4 : Magnetic Substance
7 : Product of cross-section area, velocity and time gives:
1 : Volume
2 : Density
3 : Mass
4 : Weight
8 : Glass and High Carbon Steel are examples of:
1 : Brittle substances
2 : Ductile Substance
3 : Soft Substances
4 : Hard Substances
9 : Terminal velocity of a particle in a fluid depends on:
1 : Nature of fluid
2 : Acceleration of particle
3 : Force on particle
4 : Angular velocity of particle
10 : Law of conservation of energy is basis of:
1 : Bernoulli's equation
2 : Streamline flow
3 : Equation of continuity
4 : Venturi relation
11 : A wire stretched by force F producing extension l stores energy:
1 : Fl
2 : 1/2Fl
3 : 2Fl
4 : Fl³
12 : The pressure will be low when the speed of a fluid is:
1 : Zero
2 : High
3 : Low
4 : Constant
13 : An ideal flow of any fluid must satisfy:
1 : Pascal law
2 : Bernoulli's equation
3 : Continuity equation only
4 : Both Bernoulli's equation and Continuity equation
14 : As per the law of fluid friction for steady streamline flow, the friction:
1 : Varies proportionally to velocity of fluid
2 : Varies inversely proportional to pressure
3 : Does not depend on pressure
4 : First increases then decreases
15 : If a stone is submerged in water and it weighs less in water than in air, this phenomenon is due to:
1 : The reduction of mass in water
2 : Increase of density in water
3 : Buoyant force acting upwards
4 : The gravitational force acting upward
16 : The principle of floatation is a direct application of:
1 : Pascal's law
2 : Bernoulli's principle
3 : Archimedes' principle
4 : Newton's third law
17 : Ratio of water velocities 1:4 in horizontal pipe. Ratio of diameters is:
1 : 2:1
2 : 1:2
3 : 1:4
4 : 4:1
18 : The lift force experienced by an aeroplane wings is primarily due to:
1 : Viscosity of air
2 : Density of air
3 : Pressure difference above and below the wing
4 : Gravitational force
19 : The maximum drag force on a falling sphere is 9.8 N. Its weight is:
1 : 1 N
2 : 9.8 N
3 : 19.8 N
4 : 4.9 N
20 : Venturi meter measures:
1 : Speed of fluid
2 : Density of fluid
3 : Pressure of fluid
4 : Viscosity of fluid
21 : Drag force on sphere moving slowly through fluid:
1 : 6πηrv
2 : 6πηv²
3 : 6πηr
4 : None
22 : If a wire is stretched to double its length, then the strain will be:
1 : 1
2 : 2
3 : Zero
4 : 0.5
23 : The region of stress-strain curve which obeys Hooke's law is:
1 : Proportional limit
2 : Elastic limit
3 : Plastic region
4 : Yield limit
24 : Carburetor works best due to:
1 : Bernoulli's theorem
2 : Equation of continuity
3 : Gravitational law
4 : Stokes law
25 : Formula One racing cars have:
1 : Streamlined design
2 : Turbulent design
3 : Rectangular design
4 : Elliptical design
26 : Which of the following is more elastic?
1 : Rubber
2 : Wood
3 : Sponge
4 : Steel
27 : SI unit of viscosity is:
1 : kg·m⁻¹·s⁻¹
2 : kg⁻¹·m·s⁻²
3 : kg·m²·s⁻¹
4 : kg⁻¹·m⁻²·s
28 : In the medical field, a Venturi mask used to deliver a known oxygen concentration to patients operates based on:
1 : Newton's third law
2 : Archimedes' principle
3 : Pascal's law
4 : Bernoulli's principle
29 : Stoke's Law holds for bodies with:
1 : Spherical shape
2 : Curved shape
3 : Rectangular shape
4 : Oblong shape
30 : If the radius of a droplet becomes half, then terminal velocity will become:
1 : Half
2 : Four times
3 : One third
4 : One fourth
31 : Which has maximum viscosity?
1 : Honey
2 : Water
3 : Air
4 : Acetone
32 : Which of the following is a defining characteristic of a superfluid?
1 : Zero viscosity
2 : Infinite density
3 : Zero temperature
4 : Infinite thermal conductivity
33 : The relation between N/m² and torr is:
1 : 1 torr = 133.3 N/m²
2 : 1 torr = 13.33 N/m²
3 : 1 torr = 1333.0 N/m²
4 : 1 torr = 1.333 N/m²
34 : Two fog-droplets are in freely falling condition. The ratio of their radii is 2:3. The ratio of their terminal velocity will be:
1 : 2:3
2 : 4:6
3 : 4:9
4 : 9:4
35 : The term ½ρv² in Bernoulli's equation has same unit as:
1 : Pressure
2 : Work
3 : Volume
4 : Force
36 : Which pair has same dimensions?
1 : Pressure, bulk modulus
2 : Stress, power
3 : Stress, strain
4 : Strain, strain energy
37 : The effect of decrease of pressure with the increase in speed of a fluid in a horizontal pipe is:
1 : Torricelli's effect
2 : Bernoulli's effect
3 : Venturi's effect
4 : Doppler's effect
38 : 20m high tank, hole at middle. Speed of efflux:
1 : 14 m/s
2 : 10 m/s
3 : 11.5 m/s
4 : 9.8 m/s
39 : Which of the following substances possesses the highest elasticity?
1 : Rubber
2 : Steel
3 : Copper
4 : Aluminum
40 : Terminal velocity vₜ is related to radius 'r' of a spherical object as:
1 : vₜ ∝ r²
2 : vₜ ∝ r
3 : vₜ ∝ constant
4 : vₜ ∝ 1/r²
41 : 6.0m high tank, hole at middle. Speed of efflux:
1 : 7.66 m/s
2 : 5.66 m/s
3 : 7.67 m/s
4 : 8.66 m/s
42 : Dynamic lift is related to:
1 : Bernoulli's theorem
2 : Archimedes' principle
3 : Equation of continuity
4 : Pascal's law
43 : Which of the following is a polymer solid?
1 : Wool
2 : Glass
3 : Sodium chloride
4 : Copper
44 : Rate of flow is constant according to:
1 : Bernoulli's theorem
2 : Equation of continuity
3 : Torricelli's theorem
4 : Venturi relation
45 : If the streamlines of a fluid are forced closer together, then:
1 : Speed of the fluid increases
2 : Speed of the fluid decreases
3 : Pressure of the fluid increases
4 : Speed of the fluid remains the same
46 : If the radius of a droplet becomes half, then its terminal velocity will be:
1 : Double
2 : Half
3 : Four times
4 : One fourth
47 : A wire, suspended vertically from one end, is stretched by attaching a weight of 20 N to the lower end. The weight stretches the wire by 1 mm. The strain energy will be:
1 : 0.01 J
2 : 0.02 J
3 : 0.04 J
4 : 0.1 J
48 : A wire of length L is stretched by a length I when a force F is applied at one end. If the elastic limit is not exceeded, the amount of energy stored in the wire is:
