Description : White alkali soils are — a. Acidic soil b. Sodic soil c. Saline soil d. Saline Sodic soil
Last Answer : c. Saline soil
Description : Rock phosphates are used in— (A) Saline soil (B) Sodic soil (C) Acidic soil (D) Neutral soil
Last Answer : (C) Acidic soil
Description : Use of gypsum is most beneficial in— (A) Saline soils (B) Alkali/Sodic soils (C) Acid soils (D) None of these
Last Answer : (B) Alkali/Sodic soils
Last Answer : Electrical conductivity is the substance through which electricity can circulate
Description : Which of the following principle is used to produce low-temperatures'? (1) Super conductivity (2) Joule-Kelvin effect (3) Thermo-electric effect (4) Adiabatic demagnetization
Last Answer : (4) Adiabatic demagnetization Explanation: Magnetic refrigeration is a cooling technology based on the magnetocaloiic effect. This technique can be used to attain extremely low temperatures, as well as the ... of a suitable material is caused by exposing the material to a changing magnetic field.
Description : Electric cables are formed of stranded wire to ____________. A. increase the current carrying capability for a given size wire B. increase their flexibility C. decrease the weight for a given size wire D. assure good conductivity at junction points
Last Answer : Answer: B
Description : Find the conduction current density of a material with conductivity 200units and electric field 1.5 units. a) 150 b) 30 c) 400/3 d) 300
Last Answer : d) 300
Description : Calculate the electric field when the conductivity is 20 units, electron density is 2.4 units and the velocity is 10m/s. Assume the conduction and convection current densities are same. a) 2.4 b) 4.8 c) 3.6 d) 1.2
Last Answer : d) 1.2
Description : Compute the conductivity when the current density is 12 units and the electric field is 20 units. Also identify the nature of the material. a) 1.67, dielectric b) 1.67, conductor c) 0.6, dielectric d) 0.6, conductor
Last Answer : c) 0.6, dielectric
Description : Find the conductivity of a material with conduction current density 100 units and electric field of 4 units. a) 25 b) 400 c) 0.04 d) 1600
Last Answer : a) 25
Description : Find the conduction current density when conductivity of a material is 500 units and corresponding electric field is 2 units. a) 500 b) 250 c) 1000 d) 2000
Last Answer : c) 1000
Description : The conductivity of a material with current density 1 unit and electric field 200 μV is a) 2000 b) 3000 c) 4000 d) 5000
Last Answer : d) 5000
Description : Which of the following principle is used to produce ‘low-temperatures’ ? (1) Super conductivity (2) Joule-Kelvin effect (3) Thermo-electric effect (4) Adiabatic demagneti-sation
Last Answer : Adiabatic demagneti-sation
Description : Soil having pH less than 8.5 EC more than 4 and ESP less than 15 is — a. Saline soil b. Alkaline soil c. Saline Alkaline soil d. None of these
Last Answer : a. Saline soil
Description : To be designated as Clay soil, A soil must contain at least — % clay separates. a. 40 b. 15 c. 35 d. 75
Last Answer : c. 35
Description : When is world soil day celebrated? a. December 5 b. November 15 c. January 5 d. April 15
Last Answer : a. December 5
Description : Soil salinity is measured by: (a) Potometer (b) Porometer (c) Conductivity meter (d) Calorimeter
Last Answer : Ans. ((c))
Description : A 10 cm dia steam pipe, carrying steam at 180°C, is covered with an insulation (conductivity = 0.6 W/m.°C). It losses heat to the surroundings at 30°C. Assume a heat transfer co-efficient of 0 ... that of the un-insulated steam pipe (D) Less than the steam pipe with 5 cms insulation
Last Answer : (B) Less than that of the un-insulated steam pipe
Description : Pick out the correct statement. (A) 1 kcal/hr.m.°C is equal to 1 BTU/hr. ft.°F (B) In steady state heat conduction, the only property of the substance which determines the ... in the direction of temperature rise (D) In heat transfer by forced convection, Grashoff number is very important
Last Answer : (B) In steady state heat conduction, the only property of the substance which determines the temperature distribution, is the thermal conductivity
Description : Three materials A, B and C of equal thickness and of thermal conductivity of 20, 40 & 60 kcal/hr. m. °C respectively are joined together. The temperature outside of A and C are 30°C and 100°C respectively. The interface ... C will be at a temperature of __________ °C. (A) 40 (B) 95 (C) 70 (D) 50
Last Answer : (C) 70
Description : Calculate the frequency at which the conduction and displacement currents become equal with unity conductivity in a material of permittivity 2. a) 18 GHz b) 9 GHz c) 36 GHz d) 24 GHz
Last Answer : b) 9 GHz
Description : Why is my electric utility company offering a renewable energy option?
Last Answer : You’re not supposed to ask questions about renewable energy, just say yes. If it causes harm, that’s a price we’re willing to pay. Apparently. Any other industry would be fined out of existence.
Description : Which of the following are consumer semi-durable goods? (1) Cars and television sets (2) Milk and Milk products (3) Foodgrains and other food products (4) Electrical appliance like fans and electric irons.
Last Answer : (3) Foodgrains and other food products Explanation: Goods which are neither indestructible nor lasting are defined as Semi Durable Goods. They fall in the category between Durable Goods and ... are clothing or preserved foods: vehicles and electronic home appliances are classified as Durable Goods.
Description : Which of the following methods refers to deactivation of microbes in food using electricity? A. Power Ultrasound B. Pulsed Electric field C. Hurdle technology D. All of the above
Last Answer : B. Pulsed Electric field
Description : Which of the following are consumer semi-durable goods ? (1) Cars and television sets (2) Milk and Milk products (3) Foodgrains and other food products (4) Electrical appliance like fans and electric irons.
Last Answer : Foodgrains and other food products