Description : (4) water and petrol are immiscible with each other and petrol which forms the upper layer continues to burn Explanation: Water is not effective in extinguishing a fire caused by petrol because water and ... . Water cannot generally be used to extinguish a gasoline fire, unless used in a fine mist.
Last Answer : "All the four quantum numbers of two electrons in an atom are not the same." It is the law of (1) Hund’s (2) Exclusion Principle of Pauli (3) Uncertainty Principle of Giesenberg (4) Avogadro’s law
Description : An odd shaped body weighing 7.5 kg and occupying 0.01 m3 volume will be completely submerged in a fluid having specific gravity of (A) 1 (B) 1.2 (C) 0.8 (D) 0.75
Last Answer : Answer: Option D
Description : If 850 kg liquid occupies volume of one cubic meter, men 0.85 represents its (A) Specific weight (B) Specific mass (C) Specific gravity (D) Specific density
Last Answer : Answer: Option C
Description : The mass of 2.5 m3 of a certain liquid is 2 tonnes. Its mass density is (A) 200 kg/m3 (B) 400 kg/m3 (C) 600 kg/m3 (D) 800 kg/m
Description : Hot water (0.01 m3 /min) enters the tube side of a counter current shell and tube heat exchanger at 80°C and leaves at 50°C. Cold oil (0.05 m3 /min) of density 800 kg/m3 and specific heat of ... mean temperature difference in °C is approximately (A) 32 (B) 37 (C) 45 (D) 50
Last Answer : (A) 32
Description : . An irreversible aqueous phase reaction, A + B → P, is carried out in an adiabatic mixed flow reactor. A feed containing 4kmole/m3 of each A and B enters the reactor at 8m3 /hr. If the temperature of ... be assumed to be independent of temperature and composition. (A) 190 (B) 290 (C) 390 (D) 490
Last Answer : (B) 290
Description : Calculate the recoverable waste heat (Q, in kCal/hour) from flue gases using the followingparameters: V (flow rate of the substance) 2000 m3/hr r (density of the flue gas): 0.9 kg/m3 Cp (specific heat ... (temperature difference): 120 oC h (recovery factor): 50% a. 21600 b. 43200 c. 25600 d. 34000
Last Answer : 21600
Description : Utilizing the answer to the previous problem, estimate the overall or average increase in temperature ( ΔT) of the concrete roof from the energy absorbed from the sun during a12hour day. Assume that all of the radiation absorbed goes into ... °C b. 8.9°C c. 9.9°C d. 10.9°C formula: ΔQ = m c ΔT
Last Answer : 7.9 °C
Description : The specific gravity of an oil whose specific weight is 7.85 kN/m3 , is (A) 0.8 (B) 1 (C) 1.2 (D) 1.6
Last Answer : Answer: Option A
Description : A piece of wood having weight 5 kg floats in water with 60% of its volume under the liquid. The specific gravity of wood is (A) 0.83 (B) 0.6 (C) 0.4 (D) 0.3
Last Answer : Answer: Option B
Description : The density of water is 1000 kg/m3 at (A) 0° C (B) 0° K (C) 4° C (D) 20° C
Description : The bulk density of aggregates , is (a) kN/m3 (b) Kg/1tr (c) g/cm3 (d) All the above.
Last Answer : (b) Kg/1tr
Description : A rectangular tank 10 m x 5 m in plan and 3 m deep is divided by a partition wall parallel to the shorter wall of the tank. One of the compartments contains water to a depth of 3 m, and the other a lighter ... pressure thrust on the partition wall is (a) 1000 kg (b) 1500 kg (c) 2000 kg (d) 2500 kg
Last Answer : Correct Answer is 15000 kg
Description : A liquid compressed in cylinder has a volume of 0.04 m3 at 50 kg/cm² and a volume of 0.039 m3 at 150 kg/cm². The bulk modulus of elasticity of liquid is (A) 400 kg/cm² (B) 4000 kg/cm² (C) (D)
Description : The weight per unit volume of a liquid at a standard temperature and pressure is called (A) Specific weight (B) Mass density (C) Specific gravity (D) None of these
Description : The mass per unit volume of a liquid at a standard temperature and pressure is called (A) Specific weight (B) Mass density (C) Specific gravity (D) None of these
Description : The ratio of specific weight of a liquid to the specific weight of pure water at a standard temperature is called (A) Density of liquid (B) Specific gravity of liquid (C) Compressibility of liquid (D) Surface tension of liquid
Description : A bed consists of particles of density 2000 kg/m3 . If the height of the bed is 1.5 metres and its porosity 0.6, the pressure drop required to fluidise the bed by air is (A) 25.61 kPa (B) 11.77 kPa (C) 14.86 kPa (D) 21.13 kPa
Last Answer : (B) 11.77 kPa
Description : Capacity of flight conveyor in tons/hr is given by (where, W & D = width and depth of flight respectively in metre V = speed of the conveyor, metre/second ρ = bulk density of material, kg/m3 ) (A) 3.6 W.D.V.ρ (B) 3.6 W.D.V (C) 3.6 W.V.ρ (D) 3.6 D.V.ρ
Last Answer : (A) 3.6 W.D.V.ρ
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 : Theoretical capacity of crushing rolls in tons/hr is given by (where, V = peripheral velocity, m/sec. W = width of rolls, m Dr = distance between rolls ρ = density of material to be crushed, kg/m3 here, V =πND where, N = speed of the rolls ... V.W.Dr.ρ (B) 3.6 V.W. ρ (C) 3.6 W.Dr.ρ (D) 3.6 V.W.Dr/ρ
Last Answer : (A) 3.6 V.W.Dr.ρ
Description : Density of Water is-----? A. 897 kg/m3 B. 997 kg/m3 (Answer) C. 1000 kg/m3 D. 1025 kg/m3
Last Answer : B. 997 kg/m3 (Answer)
Description : The density of Air is-------? A. 0.225 kg/m3 B. 1.025 kg/m3 C. 1.225 kg/m3 (Answer) D. 1.425 kg/m3
Last Answer : C. 1.225 kg/m3 (Answer)
Description : Bulk density of pulverised coal may be about __________ kg/m3 . (A) 100 (B) 500 (C) 1000 (D) 1500
Last Answer : (B) 500
Description : A gas (density = 1.5 kg/m3 , viscosity = 2 10 -5 kg/m.s) flowing through a packed bed (particle size = 0.5 cm, porosity = 0.5) at a superficial velocity of 2 m/s causes a pressure drop of 8400 Pa/m. The ... flowing at 3 m/s will be (A) 8400 Pa/m (B) 12600 Pa/m (C) 18900 Pa/m (D) 16800 Pa/m
Last Answer : (B) 12600 Pa/m
Description : . A 0.5 m high bed made up of a 1 mm dia glass sphere (density 2500 kg/m3 ) is to be fluidised by water (density 1000 kg/m3 ). If at the point of incipient fluidisation, the bed voidage is 40%, the pressure drop across the bed is (A) 4.4 KPa (B) 2.94 KPa (C) 3.7 KPa (D) None of these
Last Answer : (A) 4.4 KPa
Description : A 30-m vertical column of fluid (density 1878 kg/m3 ) is located where g= 9.65 mps2 . Find the pressure at the base of the column. (Formula: pg= gρhg/k ) a. 543680 N/m2 b. 543.68 kPa (gauge) c. Both a & b d. None of the above
Last Answer : Both a & b
Description : What is the unit of relative density? (1) kg/m (2) kg/m2 (3) kg/m3 (4) It has no unit
Last Answer : It has no unit
Description : Surface energy per unit area of a surface is numerically equal to (A) Atmospheric pressure (B) Surface tension (C) Force of adhesion (D) Force of cohesion
Description : The specific volume of air is expressed as the volume of: a. 1 kg of air at 101.325 kPa in cm3 b. 0.833 kg of air at standard pressure and temperature in m3 c. 1 kg of air at 101.325 ... d. 1 g of air occupied at any temperature and pressure e. 1 kg of air, regardless of temperature and pressure
Last Answer : Answer: C
Description : 04. A body floating in a liquid is said to be in a stable equilibrium, if its metacentre coincides with its centre of gravity. A) True B) False
Last Answer : B
Description : 07. The line of action of the force of buoyancy acts through the centre of gravity of the volume of the liquid displaced. A) True B) False
Last Answer : A
Description : A hydrometer indicates specific gravity by comparing the _____________. A. density of a substance in water with the density of the same substance in air B. differences in weight between water and the ... of an object in water with the buoyancy of the same object in the liquid being measured
Last Answer : Answer: D
Description : A piece weighing 3 kg in air was found to weigh 2.5 kg when submerged in water. Its specific gravity is (A) 1 (B) 5 (C) 7 (D) 6
Description : Pick out the wrong statement. (A) Aromatics have higher specific gravity than paraffins (B) Gross calorific value (GCV) of petrofuels is equal to (12400 - 2100 ρ 2 ) where, ρ is the specific gravity ... volume basis (i.e., Kcal/litre) (D) Higher specific gravity of petrofuels means higher C/H ratio
Last Answer : (C) Heavier petrofuels have higher GCV on weight basis (i.e., Kcal/kg) but lower GCV on volume basis (i.e., Kcal/litre)
Description : The weight of reinforced concrete, is generally taken as (A) 2200 kg/m3 (B) 2300 kg/m3 (C) 2400 kg/m3 (D) 2500 kg/m
Description : The live load to be considered for an accessible roof, is (A) Nil (B) 75 kg/m3 (C) 150 kg/m2 (D) 200 kg/cm
Description : For melting one tonne of cast iron (A) 700 m3 air is required (B) 20 kg limestone is required (C) One quintal coke is required (D) All the above
Description : The weight of 1 m3 of brick earth, is about (A) 1200 kg (B) 1500 kg (C) 1800 kg (D) 2000 kg
Description : If is the angle of repose of soil of weight w kg/m3 , the horizontal pressure p at a depth of h metres per metre length of wall, is (A) wh × [(1 - sin )/(1 + )] (B) (wh/2) × [(1 - sin )/(1 + )] (C) wh - sin )/(1 + )] (D) wh )/(1 - )
Description : The weight of reinforced concrete is generally take as (a) 2300 kg/m3 (b) 2400 kg/m3 (c) 2500kg/m3 (d) 2800kg/m3
Last Answer : (d) 2800kg/m3
Description : According to IS:456-2000, the total acid soluble chlorides in concrete is restricted to________ of concrete [ A ] 0.2 kg/m3 [ B ] 0.4 kg/m3 [ C ] 2 kg/m3 [ D ] 4 kg/m3
Last Answer : [ B ] 0.4 kg/m3
Description : According to IS: 456-2000, the maximum cement content exclusive of admixtures is [ A ] 200 kg/m3 [ B ] 300 kg/m3 [ C ] 450 kg/m3 [ D ] 550 kg/m3
Last Answer : [ C ] 450 kg/m3
Description : According to IS:456 minimum cement content inclusive of admixtures is [ A ] 200 kg/m3 [ B ] 300 kg/m3 [ C ] 450 kg/m3 [ D ] 550 kg/m3
Last Answer : [ B ] 300 kg/m3
Description : If dry density, water density and specific gravity of solids of a given soil sample are 1.6 g/cc, 1.84 g/cc and 2.56 respectively, the porosity of the soil sample, is (A) 0.375 (B) 0.370 (C) 0.380 (D) 0.390
Last Answer : (A) 0.375
Description : The general relationship between specific gravity (G), weight of water ( ), degree of saturation (Sr ), void ratio (e) and bulk density ( ), is (A) = (S - eSr ) /(1 + e) (B) = (G + eSr ) /(1 + e) (C) = (1 + e) /(G + Sr ) (D) = (1 - Sr ) e/(G + Sr )
Last Answer : (B) = (G + eSr ) /(1 + e)
Description : A sample of saturated soil has 30% water content and the specific gravity of soil grains is 2.6. The dry density of the soil mass in g/cm3 , is (A) 1.47 (B) 1.82 (C) 1.91 (D) None of these
Last Answer : (D) None of these