The unit of conductance in SI unit is (A) W/m (B) W/m2 (C) W/°K (D) W/m°K

The unit of conductance in SI unit is
(A) W/m
(B) W/m2
(C) W/°K
(D) W/m°K
by

1 Answer

Answer :

(C) W/°K
by

Related questions

In SI units, thermal conductivity is expressed in (A) Watt/m.°K (B) Watt/m2 . °K (C) Watt/m2 . °K (D) Watt/m4 . °K

Description : In SI units, thermal conductivity is expressed in (A) Watt/m.°K (B) Watt/m2 . °K (C) Watt/m2 . °K (D) Watt/m4 . °K

Last Answer : (A) Watt/m.°K

The unit of heat transfer co-efficient in SI unit is (A) J/M2°K (B) W/m2°K (C) W/m°K (D) J/m°K

Description : The unit of heat transfer co-efficient in SI unit is (A) J/M2°K (B) W/m2°K (C) W/m°K (D) J/m°K

Last Answer : (B) W/m2°K

Pick out the wrong statement. (A) Reciprocal of the resistance to heat flow is called thermal conductance (B) Unit of thermal conductance is W/°K (C) Thermal conductance of a wall of thickness 'L', thermal conductivity 'k' and heat flow area 'A' is kL/A (D) None of these

Description : Pick out the wrong statement. (A) Reciprocal of the resistance to heat flow is called thermal conductance (B) Unit of thermal conductance is W/°K (C) Thermal conductance of a wall of thickness 'L', thermal conductivity 'k' and heat flow area 'A' is kL/A (D) None of these

Last Answer : (C) Thermal conductance of a wall of thickness 'L', thermal conductivity 'k' and heat flow area 'A' is kL/A

In SI units, fouling factor is expressed in (A) m2°K/W (B) W/m2°K (C) m2°K (D) m°K/W

Description : In SI units, fouling factor is expressed in (A) m2°K/W (B) W/m2°K (C) m2°K (D) m°K/W

Last Answer : (A) m2°K/W

The heat flux (from outside to inside) across an insulating wall with thermal conductivity, K = 0.04 W/m.°K and thickness 0.16m is 10 W/m2 . The temperature of the inside wall is - 5°C. The outside wall temperature is (A) 25°C (B) 30°C (C) 35°C (D) 40°C

Description : The heat flux (from outside to inside) across an insulating wall with thermal conductivity, K = 0.04 W/m.°K and thickness 0.16m is 10 W/m2 . The temperature of the inside wall is - 5°C. The outside wall temperature is (A) 25°C (B) 30°C (C) 35°C (D) 40°C

Last Answer : (C) 35°C

What is the critical radius of insulation (cms) for a metallic cylinder, if the convective heat transfer co-efficient with the ambient atmosphere is 5 W/m2. °K? Thermal conductivity of metal and insulation material are 40 and 0.1 W/m.°K respectively. (A) 2 (B) 8 (C) 10 (D) 40

Description : What is the critical radius of insulation (cms) for a metallic cylinder, if the convective heat transfer co-efficient with the ambient atmosphere is 5 W/m2. °K? Thermal conductivity of metal and insulation material are 40 and 0.1 W/m.°K respectively. (A) 2 (B) 8 (C) 10 (D) 40

Last Answer : (A) 2

The variation of thermal conductivity of a metal with temperature is often correlated using an expression of the form K = K0 + at, where, K is the thermal conductivity and T is the temperature (in °K). The units of 'a' in SI system will be (A) W/m.k (B) W/m (C) W/m.k

Description : The variation of thermal conductivity of a metal with temperature is often correlated using an expression of the form K = K0 + at, where, K is the thermal conductivity and T is the temperature (in °K). The units of 'a' in SI system will be (A) W/m.k (B) W/m (C) W/m.k

Last Answer : (C) W/m.k

Pick out the wrong statement. (A) Superheated steam is preferably not used for process heating because of its low heat transfer film co-efficient (B) In a shell and tube heat exchanger, the shell pressure drop is maximum for orifice baffles (C) S.I. unit of fouling factor is Watt/m2 .°K (D) Longitudinal fins are used in extended surface heat exchangers, when the direction of fluid flow is parallel to the axis of the tube

Description : Pick out the wrong statement. (A) Superheated steam is preferably not used for process heating because of its low heat transfer film co-efficient (B) In a shell and tube heat exchanger ... surface heat exchangers, when the direction of fluid flow is parallel to the axis of the tube

Last Answer : (C) S.I. unit of fouling factor is Watt/m2 .°K

Overall heat transfer co-efficient for cooling of hydrocarbons by water is about (A) 50 -100 Kcal/hr.m2 .°C (B) 50 -100 W/m2 .°K (C) 50 -100 BTU/hr. ft. 2°F (D) 1000 - 1500 BTU/hr. ft. 2°F

Description : Overall heat transfer co-efficient for cooling of hydrocarbons by water is about (A) 50 -100 Kcal/hr.m2 .°C (B) 50 -100 W/m2 .°K (C) 50 -100 BTU/hr. ft. 2°F (D) 1000 - 1500 BTU/hr. ft. 2°F

Last Answer : (C) 50 -100 BTU/hr. ft. 2°F

A BTU/hr.ft. 2 °F is equal to (A) 1 kcal/hr. m2°C (B) 4.88 kcal/hr. m. 2°C (C) 1 kcal/hr. m2 .°K (D) None of these

Description : A BTU/hr.ft. 2 °F is equal to (A) 1 kcal/hr. m2°C (B) 4.88 kcal/hr. m. 2°C (C) 1 kcal/hr. m2 .°K (D) None of these

Last Answer : (B) 4.88 kcal/hr. m. 2°C

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

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.

SI unit of resistivity is a. ohm b. Ohm×m c. Ohm×m-1 d. Ohm×m2

Description : SI unit of resistivity is a. ohm b. Ohm×m c. Ohm×m-1 d. Ohm×m2

Last Answer : c. Ohm×m-1

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

The value of Stefan-Boltzmann constant in SI unit is (A) 5.6697 × 10 -8W/m2 .°K4 (B) 0.1714 × 10 -8W/m2 .°K4 (C) 5.6697 × 10 -8kcal/m2 . °K4 (D) 0.1714 × 10 -8kcal/m2 . °K4

Description : The value of Stefan-Boltzmann constant in SI unit is (A) 5.6697 × 10 -8W/m2 .°K4 (B) 0.1714 × 10 -8W/m2 .°K4 (C) 5.6697 × 10 -8kcal/m2 . °K4 (D) 0.1714 × 10 -8kcal/m2 . °K4

Last Answer : (A) 5.6697 × 10 -8W/m2 .°K4

A furnace is made of a refractory brick wall of thickness 0.5 metre and thermal conductivity 0.7 W/m.°K For the same temperature drop and heat loss, this refractory wall can be replaced by a layer of diatomaceous earth of thermal conductivity 0.14 W/m.K and thickness __________ metre. (A) 0.01 (B) 0.1 (C) 0.25 (D) 0.5

Description : A furnace is made of a refractory brick wall of thickness 0.5 metre and thermal conductivity 0.7 W/m.°K For the same temperature drop and heat loss, this refractory wall can be replaced by a layer of diatomaceous earth of ... and thickness __________ metre. (A) 0.01 (B) 0.1 (C) 0.25 (D) 0.5

Last Answer : (B) 0.1

The SI units of permitivity are: (a) N.m/C2(b) C2/N.m2 (c) N.m2/C2(d) N.m/C

Description : The SI units of permitivity are: (a) N.m/C2(b) C2/N.m2 (c) N.m2/C2(d) N.m/C

Last Answer : (b) C2/N.m2

From Arrhenius law, a plot of loge K versus 1/T gives a straight line with a slope of (-E/R). The unit of E/R is (A) k cal (B) k cal/°K (C) °K (D) k cal. °K

Description : From Arrhenius law, a plot of loge K versus 1/T gives a straight line with a slope of (-E/R). The unit of E/R is (A) k cal (B) k cal/°K (C) °K (D) k cal. °K

Last Answer : (C) °K

What is the unit of thermal conductivity? (A) Kcal/hr. m2 °C (B) Kcal/hr.m.°C (C) Kcal/hr.m (D) Kcal/hr. °C

Description : What is the unit of thermal conductivity? (A) Kcal/hr. m2 °C (B) Kcal/hr.m.°C (C) Kcal/hr.m (D) Kcal/hr. °C

Last Answer : (B) Kcal/hr.m.°C

. 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 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

5. Unit of surface tension in S.I. unit is (A) Watt/m (B) Joule/m2 (C) Newton/m2 (D) Joule/m

Description : 5. Unit of surface tension in S.I. unit is (A) Watt/m (B) Joule/m2 (C) Newton/m2 (D) Joule/m

Last Answer : Option B

In fluid flow, and heat and mass transfer, one encounters (i) kinematic velocity (μ), (ii) molecular diffusivity (θ) and thermal diffusivity (α). The units of these quantities are. (A) μ , α and θ all have units of m/s (B) μ , α and θ all have units of m2/s (C) α and θ have units of m2/s, while μ has unit of m/s (D) α and θ have units of m/s, while μ has unit of m2/s

Description : In fluid flow, and heat and mass transfer, one encounters (i) kinematic velocity (μ), (ii) molecular diffusivity (θ) and thermal diffusivity (α). The units of these quantities are. (A) μ , α and θ all have units of m/ ... μ has unit of m/s (D) α and θ have units of m/s, while μ has unit of m2/s

Last Answer : Option C

A metal wire of 0.01 m dia and thermal conductivity 200 W/m.K is exposed to a fluid stream with a convective heat transfer coefficient of 100 W/m2 .K. The Biot number is (A) 5.6 (B) 0.025 (C) 3.5 (D) 0.0035

Description : A metal wire of 0.01 m dia and thermal conductivity 200 W/m.K is exposed to a fluid stream with a convective heat transfer coefficient of 100 W/m2 .K. The Biot number is (A) 5.6 (B) 0.025 (C) 3.5 (D) 0.0035

Last Answer : (B) 0.025

The left face of a one dimensional slab of thickness 0.2 m is maintained at 80°C and the right face is exposed to air at 30°C. The thermal conductivity of the slab is 1.2 W/m.K and the heat transfer co-efficient from the right face is 10 W/m2 .K. At steady state, the temperature of the right face in °C is (A) 77.2 (B) 71.2 (C) 63.8 (D) 48.7

Description : The left face of a one dimensional slab of thickness 0.2 m is maintained at 80°C and the right face is exposed to air at 30°C. The thermal conductivity of the slab is 1.2 W/m.K and the heat transfer co-efficient from the ... temperature of the right face in °C is (A) 77.2 (B) 71.2 (C) 63.8 (D) 48.7

Last Answer : (D) 48.7

Maximum heat dissipation occurs from a steel wire (k = 0.5 W/m. k) of 15 mm diameter exposed to air (h = 20W/m2.k), when the insulation thickness is __________ mm. (A) 15 (B) 25 (C) 10 (D) 30

Description : Maximum heat dissipation occurs from a steel wire (k = 0.5 W/m. k) of 15 mm diameter exposed to air (h = 20W/m2.k), when the insulation thickness is __________ mm. (A) 15 (B) 25 (C) 10 (D) 30

Last Answer : (B) 25

A thin, flat & square plate measuring 2 m × 2 m is freely hanging in ambient air at 25°C. It is exposed to the solar radiation falling on one side of the plate at the rate of 500 W/m2. The plate temperature will remain constant at 30°C, if the convective heat transfer co-efficient is __________ W/m2 °C. (A) 50 (B) 100 (C) 150 (D) 200

Description : A thin, flat & square plate measuring 2 m 2 m is freely hanging in ambient air at 25°C. It is exposed to the solar radiation falling on one side of the plate at the rate of 500 W/m2. The plate temperature will ... heat transfer co-efficient is __________ W/m2 °C. (A) 50 (B) 100 (C) 150 (D) 200

Last Answer : (B) 100

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 unit of kinematic viscosity in S. I. units is (A) N-m/s (B) N-s/m2 (C) m 2 /s (D) N-m

Description : The unit of kinematic viscosity in S. I. units is (A) N-m/s (B) N-s/m2 (C) m 2 /s (D) N-m

Last Answer : Answer: Option C

The unit of dynamic viscosity in S.I. units is (A) N-m/s2 (B) N-s/m2 (C) Poise (D) Stoke

Description : The unit of dynamic viscosity in S.I. units is (A) N-m/s2 (B) N-s/m2 (C) Poise (D) Stoke

Last Answer : Answer: Option B

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 : It has no unit

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

Which of the following is NOT an SI unit of measure? w) watt x) newton y) joule z) erg e) second

Description : Which of the following is NOT an SI unit of measure? w) watt x) newton y) joule z) erg e) second

Last Answer : ANSWER: Z -- ERG

What is the SI unit for pressure? w) Torr x) pounds per square inch y) Pascal z) Kelvin

Description : What is the SI unit for pressure? w) Torr x) pounds per square inch y) Pascal z) Kelvin

Last Answer : ANSWER: Y -- PASCAL

What is the SI unit of pressure? w) Pascal x) Torr y) Dyne z) Kelvin

Description : What is the SI unit of pressure? w) Pascal x) Torr y) Dyne z) Kelvin

Last Answer : ANSWER: W -- PASCAL

The SI unit of pressure is the: w) Torr x) dyne per centimeter squared y) atmosphere z) pascal

Description : The SI unit of pressure is the: w) Torr x) dyne per centimeter squared y) atmosphere z) pascal

Last Answer : ANSWER: Z -- PASCAL

'Farad' is the unit of : (1) Capacitance (2) Inductance (3) Resistance (4) Conductance

Description : 'Farad' is the unit of : (1) Capacitance (2) Inductance (3) Resistance (4) Conductance

Last Answer : (1) Capacitance Explanation: The Farad is the SI derived unit of capacitance. It is named after the English physicist Michael Faraday.

Siemens is the unit of---------? A. Electrical Conductance (Answer) B. Magnetic Conductance C. Electrical Capacitance D. Magnetic Capacitance

Description : Siemens is the unit of---------? A. Electrical Conductance (Answer) B. Magnetic Conductance C. Electrical Capacitance D. Magnetic Capacitance

Last Answer : A. Electrical Conductance (Answer)

Gilbert is a unit of (a) electromotive force (6) magnetomotive force (c) conductance (d) permittivity

Description : Gilbert is a unit of (a) electromotive force (6) magnetomotive force (c) conductance (d) permittivity

Last Answer : (6) magnetomotive force

What is the unit of conductance and what other term is sometimes used?

Description : What is the unit of conductance and what other term is sometimes used?

Last Answer : NThe mho (v), siemens

Define specific conductance. Write its unit.

Description : Define specific conductance. Write its unit.

Last Answer : Specific conductance is the conductance offered by 1 cm3 of the substance or 1ml solution.  OR The conductance offered by a solution or a conducting material having unit length & unit area of cross ... conductance. Unit of specific conductance: ohm-1 cm-1 or mhos-cm-1 or S.cm-1

Define the term equivalent conductance. Write its unit

Description : Define the term equivalent conductance. Write its unit

Last Answer : Equivalent conductance (λv): It is the conductance of the solution containing 1 gm equivalent of solute / electrolyte when placed between two sufficiently large electrodes 1 cm apart. Unit: ohm-1 cm2 / equivalent OR mhos.cm2 /equivalent 

‘Farad’ is the unit of : (1) Capacitance (2) Inductance (3) Resistance (4) Conductance

Description : ‘Farad’ is the unit of : (1) Capacitance (2) Inductance (3) Resistance (4) Conductance

Last Answer : Capacitance

The Weber and the Maxwell are units of measure of: w) conductance x) electrical current y) magnetic flux z) relative speed

Description : The Weber and the Maxwell are units of measure of: w) conductance x) electrical current y) magnetic flux z) relative speed

Last Answer : ANSWER: Y -- MAGNETIC FLUX

The Tesla and the Gauss are units of measure of: w) conductance x) magnetic field strength y) magnetic flux z) electrical current

Description : The Tesla and the Gauss are units of measure of: w) conductance x) magnetic field strength y) magnetic flux z) electrical current

Last Answer : ANSWER: X -- MAGNETIC FIELD STRENGTH

Determine the conductance of a two-wire open line with the following parameters: D = 4 in., d = 0.1 in. and ρ = 2.6x108 Ω-m. A. 2.76x10-9 S/m B. 2.76x10-6 S/m C. 2.76x10-12 S/m D. 2.76x10-3 S/m

Description : Determine the conductance of a two-wire open line with the following parameters: D = 4 in., d = 0.1 in. and ρ = 2.6x108 Ω-m. A. 2.76x10-9 S/m B. 2.76x10-6 S/m C. 2.76x10-12 S/m D. 2.76x10-3 S/m

Last Answer : A. 2.76x10-9 S/m

Which solution will allow greater conductance of electricity, 1 M NaCl at 293 K or 1 M NaCl at 323 K and why ?

Description : Which solution will allow greater conductance of electricity, 1 M NaCl at 293 K or 1 M NaCl at 323 K and why ?

Last Answer : Ans. 1 M NaCl at 323 K as the ionic mobilities increase with increase in temperature. 

If the specific heats of a gas and a vapor are 0.2KJ/Kg.°K and 1.5 KJ/Kg.°K respectively, and the humidity is 0.01; the humid heat in KJ/°Kg. is (A) 0.31 (B) 0.107 (C) 0.017 (D) 0.215

Description : If the specific heats of a gas and a vapor are 0.2KJ/Kg.°K and 1.5 KJ/Kg.°K respectively, and the humidity is 0.01; the humid heat in KJ/°Kg. is (A) 0.31 (B) 0.107 (C) 0.017 (D) 0.215

Last Answer : (D) 0.215

A composite flat wall of a furnace is made of two materials 'A' and 'B'. The thermal conductivity of 'A' is twice of that of material 'B', while the thickness of layer of 'A' is half that of B. If the temperature at the two sides of the wall are 400 and 1200°K, then the temperature drop (in °K) across the layer of material 'A' is (A) 125 (B) 133 (C) 150 (D) 160

Description : A composite flat wall of a furnace is made of two materials 'A' and 'B'. The thermal conductivity of 'A' is twice of that of material 'B', while the thickness of layer of 'A' is half that of B. If the temperature ... drop (in °K) across the layer of material 'A' is (A) 125 (B) 133 (C) 150 (D) 160

Last Answer : (D) 160