Description : For spheres, volume shape factor is given by (A) π = (A/D2 ) (B) 2π = (2A/D2 ) (C) π/6 = (V/D3 ) (D) AD/V
Last Answer : (C) π/6 = (V/D3 )
Description : The torque transmitted by a hollow shaft of outer diameter (D) and inner diameter (d) (a)π/4fs(D2-d2)/D (b) π/4fs(D3-d3)/D (c) π/4fs(D4-d4)/D (d) π/4fs(D4-d4)/D
Last Answer : (c) π/4fs(D4-d4)/D
Description : For spheres, the specific surface shape factor is given by (A) AD/V (B) D/V (C) A/V (D) √(AD/V)
Last Answer : (A) AD/V
Description : A compound pipe of diameter d1, d2 and d3 having lengths l1, l2 and l3 is to be replaced by an equivalent pipe of uniform diameter d and of the same length (l) as that of the compound pipe. The size of the equivalent pipe is given by (A) l/d² = + + (B) l/d³ = + ) + (C) = + + (D)
Last Answer : Answer: Option D
Description : The polar moment of inertia of a hollow shaft of outer diameter (D) and inner diameter (d) is given by. (a)π/16(D3-d3) (b) π/16(D4-d4) (c) π/16(D4-d4) (d) π/16(D4-d4/d)
Last Answer : (b) π/16(D4-d4)
Description : Mass flow of granular solid (M) through a circular opening of dia, D follows (A) M ∝ √D (B) M ∝ D2 (C) M ∝ D3 (D) M ∝ D
Last Answer : (C) M ∝ D
Description : What is wrong here? =SUMIFS(D2:D3,">(TODAY()-14)",(N2:N3))
Last Answer : answer:Your parameters are in the wrong order. The last parameter should be a criterion condition, according to microsoft Office SUMIF documentation. So the N column part should be first. From the ... copying and editing these similar functions, make sure you put the arguments in the correct order.
Description : hydraulically equivalent, the relationship which holds good, is A. D8/3 = 4 b8/3 B. D3/8 = 4 b3/8 C. D2/3 = 4 b2/3 D. D3/2 = 4 b3/2
Last Answer : ANS: A
Description : Shear stress in a close coiled helical spring is (a) 16WD/π d3 (b) 32WD/π d3 (c) 8WD/π d3 (d) None
Last Answer : (c) 8WD/π d3
Description : Sphericity for a non-spherical particle is given by (where, V and S are volume and surface area respectively of one particle. and, D = equivalent diameter of particle). (A) 6.V/D.S (B) V/6D.S (C) D.S/V (D) V/D.S
Last Answer : (B) V/6D.S (C) D.S/V (D) V/D.S
Description : The curved surface area of a right circular cylinder of height 14 cm is 88 cm2. Find the diameter of the base of the cylinder. (Assume π =22/7 ) -Maths 9th
Last Answer : Height of cylinder, h = 14cm Let the diameter of the cylinder be d Curved surface area of cylinder = 88 cm2 We know that, formula to find Curved surface area of cylinder is 2πrh. So 2πrh =88 cm2 (r is the ... 88 cm2 2r = 2 cm d =2 cm Therefore, the diameter of the base of the cylinder is 2 cm.
Description : Reciprocal of sphericity is termed as the (A) Specific surface ratio (B) Shape factor (C) Sauter diameter (D) Surface area per unit mass
Last Answer : (B) Shape factor
Description : The specific surface of spherical particles is proportional to (where, Dp = diameter of particle). (A) D2 p (B) Dp (C) 1/Dp (D) 1/D2p
Last Answer : (C) 1/Dp
Description : rpm of a trommel at critical speed is given by (where, D = Diameter of trommel in ft) (A) 76.65/D (B) 76.65/√D (C) 76.65/D2 (D) 76.75 √D
Last Answer : (B) 76.65/√D
Description : Pick out the wrong statement. (A) The equivalent stiffness of two springs (of equal stiffness 'S') in series is S/2 while in parallel is 2S (B) For a helical spring, deflection is ... is less than the buckling load (D) Modulus of resilience is proportional to (stress at elastic limit)2
Last Answer : (C) Crushing load or columns is less than the buckling load
Description : The sphericity of a solid particle of cubical shape is (A) π (B) (π/6) 1/3 (C) (π/6) 1/2 (D) π/3
Last Answer : (B) (π/6) 1/3 (C) (π/6) 1/2
Description : For laminar flow of a fluid through a packed bed of spheres of diameter d, the pressure drop per unit length of bed depends upon the sphere diameter as (A) d (B) d 2 (C) d 4 (D) d
Last Answer : (D) d
Description : In the given figure, AB is the diameter where AP = 12 cm and PB = 16 cm. If the value of π is taken 3, what is the perimeter of the shaded region? (a) 58 cm (b) 116 cm (c) 29 cm (d) 156 cm
Last Answer : (a) 58 cm
Description : Power required to drive a ball mill with a particular ball load is proportional to (where, D = diameter of ball mill.) (A) D (B) 1/D (C) D2.5 (D) 1/D2.5
Last Answer : (C) D2.5 (D) 1/D2
Description : At low Reynold's number, the power (P) required for agitating a fluid in a stirred tank becomes independent of inertial forces. In this limit, indicate which of the following relations is satisfied: Po = ρ/ρN3 D5 : Power number Re = ρ N D2 ... Re -1.0 (B) Po ∝ Re 0.0 (C) Po ∝ Re 0.5 (D) Po ∝ Re 1.0
Last Answer : (B) Po ∝ Re 0.0 (C) Po ∝ Re 0.5
Description : In a fully turbulent flow (Re > 10 5 ) in a pipe of diameter 'd', for a constant pressure gradient, the dependence of volumetric flow rate of an incompressible fluid is (A) d (B) d 2 (C) d 2.5 (D) d
Last Answer : (C) d 2.5
Description : For pipe flows, head is proportional to __________ at constant capacity(where, D = pipe diameter). (A) 1/D (B) 1/D2 (C) 1/D5 (D) D
Last Answer : (C) 1/D5
Description : If dp is the equivalent diameter of a non-spherical particle, Vp its volume and sp its surface area, then its sphericity is φs is defined by (A) φs = 6 Vp /dpsp (B) φs = Vp /dpsp (C) φs = 6 dpSp /Vp (D) φs = dpSp /Vp
Last Answer : (A) φs = 6 Vp /dpsp
Description : If the potential is given by, V = 10sin θ cosφ/r, find the density at the point P(2, π/2, 0) (in 10 -12 units) a) 13.25 b) 22.13 c) 26.31 d) 31.52
Last Answer : b) 22.13
Description : .In case of a hollow shaft the average torsional energy/unit volume is given by a. (τ2/4C) x (D2+d2/D2) b. (τ2/C) x (D2+d2/D2) c. (τ2/4C) x (D+d/D2) d. (τ/C) x (D2+d2/D2)
Last Answer : a. (τ2/4C) x (D2+d2/D2)
Description : Are spheres natures goto storage shape?
Last Answer : answer:Of all the solids having a given volume, the sphere is the one with the smallest surface area; of all solids having a given surface area, the sphere is the one having the greatest volume. ... prisms and there would be wasted storage space if we tried to fit square boxes into round cars.
Description : A spherical metal of radius 10 cm is melted and made into 1000 smaller spheres of equal sizes. In this process the surface area of the -Maths 9th
Last Answer : Option (C) is correct. Solution: Let the radius of the small spheres be r' cm. Volume of metal remains the same in both cases. So, vol of the spherical metal of radius 10 cm = total ... Total Surface area of 1000 smaller spheres: 1000*4π12 = 4000π Hence, the surface area increased by 10 times.
Description : A drop of liquid assumes spherical shape because: (1) Intermolecular forces are strong in liquids (2) A sphere has the least surface area for a given volume (3) A sphere has the largest surface area for a given volume (4) Inter molecular forces are weak in liquids
Last Answer : (2) A sphere has the least surface area for a given volume Explanation: A drop of liquid assumes spherical shape because a sphere has the least surface area for a given volume.
Last Answer : A sphere has the least surface area for a given volume
Description : An iron sphere of mass 10 kg has the same diameter as an aluminium sphere of mass is 3.5 kg. Both spheres are dropped simultaneously from a tower. When they are l0 m above the ground, they have the same. -Physics
Last Answer : (a) acceleration
Description : What is The surface area of a sphere can be approximated as follows Surface area 4πr2 where r is the radius of the sphere π is a constant that is roughly equal to 3. Using the simple approximat?
Last Answer : 300 m^2
Description : Insulation of liquid surface can be achieved by __________ on top of its surface. (A) Floating hollow polypropylene spheres (B) Spraying alumina powder (C) Putting cement (D) None of these
Last Answer : (A) Floating hollow polypropylene spheres
Description : The volume of two spheres are in the -Maths 9th
Last Answer : Let r1 and r2 be the radii of two spheres . Then, the ratio of their volumes is given by 4/3πr13/4/3πr23 = 64/27 (r1/r2)3 = (4/3)3 ⇒ r1/r2 = 4/3 Now, ratios of surface areas of two spheres = 4/3πr12/4/3πr22 = (r1/r2)2 = (4/3)2 = 16/9 ∴ Required ratio = 16 : 9
Description : What are the assumptions of the kinetic gas theory? A. Gas molecules do not attract each other B. The volume of the gas molecules is negligible compared to the volume of the gas C. The molecules behave like hard spheres D. All of the above
Last Answer : All of the above
Description : __________ mean diameter of particles is given by Σ (xi /Dpi ⃗) (A) Mass (B) Volume (C) Arithmetic (D) Volume surface
Last Answer : (B) Volume
Description : The capacity of a classifier in 'tons of solid/hr' is given by (where, A = cross-sectional area in m2 , V = rising velocity of fluid in m/sec, S = percentage of solids in the suspension by volume, ρ = density of solids in kg/m3 ) (A) 3.6 AVS.ρ (B) 3.6 A.V.ρ (C) 3.6 A.S. ρ (D) 3.6 AVS/ρ
Last Answer : (A) 3.6 AVS.ρ
Description : Shape factor for a cylinder whose length equals its diameter is (A) 1.5 (B) 0.5 (C) 1.0 (D) 2.0
Last Answer : (A) 1.5
Description : Water is flowing through a 1 foot diameter pipe at the rate of 10ft/sec. What is the volume flow rate of water in ft³/sec? a. 7.85 b. 6.85 c. 8.85 d. 5.85 V = Aν
Last Answer : 7.85
Description : Solidification time of a molten metal in a casting is proportional to (where, V = volume of metal & A = its surface area; in the casting) (A) V/A (B) V/A2 (C) V2/A (D) V2/A2
Last Answer : (D) V2/A2
Description : Compute the Gauss law for D = 10ρ 3 /4 i, in cylindrical coordinates with ρ = 4m, z = 0 and z = 5, hence find charge using volume integral. a) 6100 π b) 6200 π c) 6300 π d) 6400 π View Answe
Last Answer : d) 6400 π
Description : Compute divergence theorem for D = 5r 2 /4 i in spherical coordinates between r = 1 and r = 2 in volume integral. a) 80 π b) 5 π c) 75 π d) 85 π
Last Answer : c) 75 π
Description : Evaluate Gauss law for D = 5r 2 /4 i in spherical coordinates with r = 4m and θ = π/2 as volume integral. a) 600 b) 588.9 c) 577.8 d) 599.7
Last Answer : b) 588.9
Description : The volumes of two spheres are in the ratio 64 : 27. Find the difference of their surface areas, if the sum of their radii is 7 cm. -Maths 9th
Last Answer : answer:
Description : Falling drops of water become spheres due to the property of (A) Surface tension of water (B) Compressibility of water (C) Capillarity of water (D) Viscosity of water
Last Answer : Answer: Option A
Description : Falling drops of water become spheres due to the property of (A) Adhesion (B) Cohesion (C) Surface tension (D) Viscosity
Last Answer : Answer: Option C
Description : A pollutant P degrades according to first order kinetics. An aqueous stream containing P at 2 kmole/m3 and volumetric flow rate 1m3 /h requires a mixed flow reactor of volume V to bring down the pollutant level to 0.5 kmole/ ... reactor should be increased by a factor of: (A) 7 (B) 6 (C) 3 (D) 7/3
Last Answer : (A) 7
Description : The time and space complexity of BFS is (For time and space complexity problems consider b as branching factor and d as depth of the search tree.) a) O(bd+1) and O(bd+1) b) O(b2) and O(d2) c) O(d2) and O(b2) d) O(d2) and O(d2)
Last Answer : a) O(bd+1) and O(bd+1)
Description : The area of the circle that can be inscribed in a square of side 6 cm is (a) 36 π cm 2 (b) 18 π cm 2 (c) 12 π cm 2 (d) 9 π cm 2
Last Answer : (d) 9 π cm 2
Description : The interfacial area per unit volume of dispersion, in a gas-liquid contactor, for fractional hold up of gas = 0.1 and gas bubble diameter = 0.5 mm is given by (in m2 /m3 ) (A) 500 (B) 1200 (C) 900 (D) 800
Last Answer : (A) 500
Description : If the volume of a sphere is numerically equal to its surface area, then find the diameter of the sphere. -Maths 9th
Last Answer : Let r be the radius of the sphere. and Volume of a sphere = surface area of the sphere ⇒ 4 / 3πr3 = 4πr2 ⇒ r = 3 cm ∴ Diameter of the sphere = 2r = 2 × 3 = 6 cm