What is the unit of relative density? (1) kg/m (2) kg/m2 (3) kg/m3 (4) It has no unit

What is the unit of relative density? (1) kg/m (2) kg/m2 (3) kg/m3 (4) It has no unit

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It has no unit
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SI unit for the surface tension is ____. (1) kg/m2 (2) kg/m3 (3) N/m (4) kg/m

Description : SI unit for the surface tension is ____. (1) kg/m2 (2) kg/m3 (3) N/m (4) kg/m

Last Answer : (3) N/m Explanation: Surface tension is measured in force per unit length. Its SI unit is Newton per meter.

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

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

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

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

Unit of mass velocity is (A) kg/hr (B) kg/m2 . hr (C) kg/m2 (D) kg/m3 . hr

Description : Unit of mass velocity is (A) kg/hr (B) kg/m2 . hr (C) kg/m2 (D) kg/m3 . hr

Last Answer : (B) kg/m2 . hr

For an incompressible fluid, the bulk modulus of elasticity is (A) 5 kg/m3 (B) ∞ N/m2 (C) 1 N (D) 0 N/m

Description : For an incompressible fluid, the bulk modulus of elasticity is (A) 5 kg/m3 (B) ∞ N/m2 (C) 1 N (D) 0 N/m

Last Answer : (B) ∞ N/m2

What is the unit of relative density? (1) kg/m (2) kg/m² (3) kg/m³ (4) It has no unit

Description : What is the unit of relative density? (1) kg/m (2) kg/m² (3) kg/m³ (4) It has no unit

Last Answer : (4) It has no unit Explanation: Relative density is the ratio of the density (mass of a unit volume) of a substance to the density of a given reference material. So, it is a dimensionless quantity and has no unit.

Mean drift velocity of electron in a copper wire having cross-sectional area 5.0 × 10-6 m2 carrying current of 1 A and having number density 8.5 × 1028 m3 is A. 0.015 mm s-1 B. 0.1 mm s-1 C. 0.5 mm s-1 D. 0.25 mm s-1

Description : Mean drift velocity of electron in a copper wire having cross-sectional area 5.0 × 10-6 m2 carrying current of 1 A and having number density 8.5 × 1028 m3 is A. 0.015 mm s-1 B. 0.1 mm s-1 C. 0.5 mm s-1 D. 0.25 mm s-1

Last Answer : 0.015 mm s-1

A masonry dam (density = 20,000 N/m3 ) 6 m high, one metre wide at the top and 4 m wide at the base, has vertical water face. The minimum stress at the base of the dam when the reservoir is full, will be (A) 75 N/m2 (B) 750 N/m2 (C) 7500 N/m2 (D) 75000 N/m

Description : A masonry dam (density = 20,000 N/m3 ) 6 m high, one metre wide at the top and 4 m wide at the  base, has vertical water face. The minimum stress at the base of the dam when the reservoir is  full, will be  (A) 75 N/m2 (B) 750 N/m2 (C) 7500 N/m2 (D) 75000 N/m

Last Answer : (C) 7500 N/m

(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 petrol are immiscible with each other and petrol which forms the upper layer continues to burn. The specific gravity (or relative density) of gasoline ranges from 0.71-0.77 kg/l (719.7 kg/m3) while the specific gravity of water is 1000 kg/m3 and that is why gasoline or petrol floats on the upper surface of the water. Water cannot generally be used to extinguish a gasoline fire, unless used in a fine mist.

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

The unit of bulk modulus of elasticity for a liquid in S.I. unit is (A) N (B) N/m (C) N/m2 (D) N/m3

Description : The unit of bulk modulus of elasticity for a liquid in S.I. unit is (A) N (B) N/m (C) N/m2 (D) N/m3

Last Answer : (C) N/m2

The unit of surface tension is (A) N/m (B) N/m2 (C) N/m3 (D) N-m

Description : The unit of surface tension is (A) N/m (B) N/m2 (C) N/m3 (D) N-m

Last Answer : Answer: Option A

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 : 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

Last Answer : Answer: Option C

Molecular volume of any perfect gas at 600 x 103 N/m2 and 27°C will be  (a) 4.17m3/kgmol  (b) 400 m3/kg mol  (c) 0.15 m3/kg mol  (d) 41.7 m3/kg mol  (e) 417m3/kgmol.

Description : Molecular volume of any perfect gas at 600 x 103 N/m2 and 27°C will be  (a) 4.17m3/kgmol  (b) 400 m3/kg mol  (c) 0.15 m3/kg mol  (d) 41.7 m3/kg mol  (e) 417m3/kgmol.

Last Answer : Answer : a

If the cohesive force (c), is 1.5 t/m2 , the density ) of the soil is 2.0 t/m3 , factor of safety (F) is 1.5 and stability factor (Sn) is 0.05, the safe height of a slope, is (A) 5 metres (B) 8 metres (C) 10 metres (D) 12 metres

Description : If the cohesive force (c), is 1.5 t/m2 , the density ) of the soil is 2.0 t/m3 , factor of safety (F) is 1.5 and stability factor (Sn) is 0.05, the safe height of a slope, is (A) 5 metres (B) 8 metres (C) 10 metres (D) 12 metres

Last Answer : (C) 10 metres

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 in rotation per second (rps) D = diameter of rolls, m). (A) 3.6 V.W.Dr.ρ (B) 3.6 V.W. ρ (C) 3.6 W.Dr.ρ (D) 3.6 V.W.Dr/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

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 pressure drop for another gas, with density of 1.5 kg/m3and viscosity of 3 × 10 ‒5kg/m.s flowing at 3 m/s will be (A) 8400 Pa/m (B) 12600 Pa/m (C) 18900 Pa/m (D) 16800 Pa/m

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

. 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

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

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 : 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

Last Answer : Answer: Option D

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 heating the roof. The specific heat of concrete is about 900 J/kg, and the density is about 2,300 kg/m3 .  a. 7.9 °C  b. 8.9°C  c. 9.9°C  d. 10.9°C formula: ΔQ = m c ΔT

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

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

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

For a clay slope of height of 10 m, the stability number is 0.05, = 2.0 t/m3 , C = 2.5 t/m2 , the critical height of the slope of the soil, is (A) 4.0 m (B) 12.5 m (C) 25.0 m (D) 15.0 m

Description : For a clay slope of height of 10 m, the stability number is 0.05, = 2.0 t/m3 , C = 2.5 t/m2 , the critical height of the slope of the soil, is (A) 4.0 m (B) 12.5 m (C) 25.0 m (D) 15.0 m

Last Answer : (C) 25.0 m

In a non-flow reversible process for which p = (- 3V+ 15) x 105N/m2,V changes from 1 m to 2 m3. The work done will be about  (a) 100 xlOO5 joules  (b) lxlO5 joules  (c) 10 xlO5 joules  (d) 10 xlO5 kilo joules  (e) 10xl04ki\ojoules.

Description : In a non-flow reversible process for which p = (- 3V+ 15) x 105N/m2,V changes from 1 m to 2 m3. The work done will be about  (a) 100 xlOO5 joules  (b) lxlO5 joules  (c) 10 xlO5 joules  (d) 10 xlO5 kilo joules  (e) 10xl04ki\ojoules.

Last Answer : Answer : c

Relative humidity is express in — a. g/m3 b. g/kg c. Percentage d. None of these

Description : Relative humidity is express in — a. g/m3 b. g/kg c. Percentage d. None of these

Last Answer : c. Percentage

. One stoke (unit of kinematic viscosity) is equivalent to (A) 1 cm2 /second (B) 1 m2 /second (C) 1 gm/cm. second (D) 1 kg. m/second

Description : . One stoke (unit of kinematic viscosity) is equivalent to (A) 1 cm2 /second (B) 1 m2 /second (C) 1 gm/cm. second (D) 1 kg. m/second

Last Answer : (A) 1 cm2 /second

The unit of dynamic viscosity in SI unit is (A) kg/m. sec (B) N/m2 (C) m2 /sec (D) m/N. sec

Description : The unit of dynamic viscosity in SI unit is (A) kg/m. sec (B) N/m2 (C) m2 /sec (D) m/N. sec

Last Answer : (A) kg/m. sec

The unit of Torque in SI units (a) kg-m (b) kg-cm (c) N-m (d) N/m2

Description : The unit of Torque in SI units (a) kg-m (b) kg-cm (c) N-m (d) N/m2

Last Answer : (c) N-m

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

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

Density of Water is-----? A. 897 kg/m3 B. 997 kg/m3 (Answer) C. 1000 kg/m3 D. 1025 kg/m3

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)

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

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)

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 2 kJ/kg.K enters at 20°C. The log mean temperature difference in °C is approximately (A) 32 (B) 37 (C) 45 (D) 50

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

Bulk density of pulverised coal may be about __________ kg/m3 . (A) 100 (B) 500 (C) 1000 (D) 1500

Description : Bulk density of pulverised coal may be about __________ kg/m3 . (A) 100 (B) 500 (C) 1000 (D) 1500

Last Answer : (B) 500

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

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

19. The density of a liquid in kg/m3 is numerically equal to its specific gravity. A) True B) False

Description : 19. The density of a liquid in kg/m3 is numerically equal to its specific gravity. A) True B) False

Last Answer : A

The density of water is 1000 kg/m3 at (A) 0° C (B) 0° K (C) 4° C (D) 20° C

Description : The density of water is 1000 kg/m3 at (A) 0° C (B) 0° K (C) 4° C (D) 20° C

Last Answer : Answer: Option C

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 of the substance): 0.20 kCal/kg oC DT (temperature difference): 120 oC h (recovery factor): 50% a. 21600 b. 43200 c. 25600 d. 34000

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

The bulk density of aggregates , is (a) kN/m3 (b) Kg/1tr (c) g/cm3 (d) All the above.

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

Oxytremorine is a selective agonist of muscarinic _______ receptors (a) M1 (b) M2 (c) M3 (d) M4

Description : Oxytremorine is a selective agonist of muscarinic _______ receptors (a) M1 (b) M2 (c) M3 (d) M4

Last Answer : Ans: A

Which of the following is the most liquid money? A. M1 B. M2 C. Securities D. M3 E. Call Money

Description : Which of the following is the most liquid money? A. M1 B. M2 C. Securities D. M3 E. Call Money

Last Answer : A. M1 Explanation: The most liquid portions of the money supply are measured by M1 because it contains currency and assets that can be converted to cash quickly. ―Near money‖ and ―near, near money,‖ which fall under M2 and M3, cannot be converted to currency as quickly.

Consider different activities related to email: m1: Send an email from a mail client to a mail server m2: Download an email from mailbox server to a mail client m3: Checking email in a web browser Which is the application level protocol used in each activity? a. m1: HTTP m2: SMTP m3: POP b. m1: SMTP m2: FTP m3: HTTP c. m1: SMTP m2: POP m3: HTTP d. m1: POP m2: SMTP m3: IMAP

Description : Consider different activities related to email: m1: Send an email from a mail client to a mail server m2: Download an email from mailbox server to a mail client m3: Checking email in a web browser Which is the application ... FTP m3: HTTP c. m1: SMTP m2: POP m3: HTTP d. m1: POP m2: SMTP m3: IMAP

Last Answer : c. m1: SMTP m2: POP m3: HTTP

The intensity of active earth pressure at a depth of 10 metres in dry cohesionless sand with an angle of internal friction of 30° and with a weight of 1.8 t/m3 , is (A) 4 t/m2 (B) 5 t/m2 (C) 6 t/m2 (D) 7 t/m2

Description : The intensity of active earth pressure at a depth of 10 metres in dry cohesionless sand with an angle of internal friction of 30° and with a weight of 1.8 t/m3 , is (A) 4 t/m2 (B) 5 t/m2 (C) 6 t/m2 (D) 7 t/m2

Last Answer : Answer: Option C

The expected out turn of half brick partition wall per mason per day is (A) 1.5 m3 (B) 2.0 m3 (C) 4.0 m2 (D) 5.0 m2

Description : The expected out turn of half brick partition wall per mason per day is (A) 1.5 m3 (B) 2.0 m3 (C) 4.0 m2 (D) 5.0 m2

Last Answer : (B) 2.0 m3

S.I. unit of Magnetic flux is (1) weber (2) weber/m (3) weber/m4 (4) weber–m2

Description : S.I. unit of Magnetic flux is (1) weber (2) weber/m (3) weber/m4 (4) weber–m2 

Last Answer : weber

The units of moment of inertia of an area are a.kg - m b.m4 c.kg - m4 d.kg - m3 e.(kg - m)2

Description : The units of moment of inertia of an area are a.kg - m b.m4 c.kg - m4 d.kg - m3 e.(kg - m)2

Last Answer : b. m4

At equilibrium the concentration of water in vapour phase (C* ) in kg/m3 of air space and the amount of water (m) adsorbed per kg of dry silica gel are related by, C* = 0.0667m. To maintain dry conditions in a room of air space 100m3 containing 2.2 kg of water vapour initially, 10 kg of dry silica gel is kept in the room. The fraction of initial water remaining in the air space after a long time (during which the temperature is maintained constant) is (A) 0.0 (B) 0.2 (C) 0.4 (D) 1.0

Description : At equilibrium the concentration of water in vapour phase (C* ) in kg/m3 of air space and the amount of water (m) adsorbed per kg of dry silica gel are related by, C* = 0.0667m. To maintain dry conditions in a room ... which the temperature is maintained constant) is (A) 0.0 (B) 0.2 (C) 0.4 (D) 1.0

Last Answer : (C) 0.4

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 weight of reinforced concrete, is generally taken as (A) 2200 kg/m3 (B) 2300 kg/m3 (C) 2400 kg/m3 (D) 2500 kg/m

Last Answer : Answer: Option C

The units of moment of inertia are a.kgm4 b.kg-m2 c.kg/m2 d.kg/m e.m4

Description : The units of moment of inertia are a.kgm4 b.kg-m2 c.kg/m2 d.kg/m e.m4

Last Answer : c. kg/m2

A 100 kg flywheel having a radius of gyration of 1 m is rotating at 1000 rpm. The angular momentum of the flywheel about its axis of rotation, in kg m2/s is a.1000 b.107 dynes c.10000 d.10470 e.5235

Description : A 100 kg flywheel having a radius of gyration of 1 m is rotating at 1000 rpm. The angular momentum of the flywheel about its axis of rotation, in kg m2/s is a.1000 b.107 dynes c.10000 d.10470 e.5235

Last Answer : d. 10470

The live load to be considered for an inaccessible roof, is (A) Nil (B) 75 kg/m2 (C) 150 kg/cm2 (D) 200 kg/m

Description : The live load to be considered for an inaccessible roof, is (A) Nil (B) 75 kg/m2 (C) 150 kg/cm2 (D) 200 kg/m

Last Answer : Answer: Option B

Mass of steel sphere having density 7850 kg m-3 and radius 0.15 m is A. 112 kg B. 290 kg C. 110.9 kg D. 300 kg

Description : Mass of steel sphere having density 7850 kg m-3 and radius 0.15 m is A. 112 kg B. 290 kg C. 110.9 kg D. 300 kg

Last Answer : 110.9 kg