Name any two applications of following gases: (i) Nitrogen (ii) Hydrogen (iii) Sf6 (iv) Air.

Name any two applications of following gases: (i) Nitrogen (ii) Hydrogen (iii) Sf6 (iv) Air. 
by

1 Answer

Answer :

i) Applications of Nitrogen: 

1. As a cooling agent.

2. To avoid oxidation.

3. Electrical insulating material (Gas) in electrical equipment.

ii) Applications of Hydrogen: 

1. High thermal conductivity material (gas).

2. High electrical strength material.

3. As a cooling agent in electrical machines.

iii) Applications of SF6 (Sulpher Hexa fluoride) : 

1. Non inflammable material (gas).

2. High dielectrical strength material.

3. As a cooling agent in circuit breaker.

iv) Applications of Air: 

1. As a cooling agent in electrical machines.

2. Electrical insulating material (Gas) in electrical equipment. 
by

Related questions

Explain the use of following tools in carrying out electrical wiring installation: (i) Nose pliers (ii) Test lamps (iii) Crimping tools (iv) Cutter.

Description : Explain the use of following tools in carrying out electrical wiring installation: (i) Nose pliers (ii) Test lamps (iii) Crimping tools (iv) Cutter. 

Last Answer : (i) Nose pliers : To hold and tight the wires (ii) Test lamps: Verification of voltage & current in the system and also check the open circuit (iii) Crimping tools: for crimping of the lugs for wires and cables (iv) Cutter: To cut the wire and remove the insulation 

Explain the function of : (i) DB (ii) Socket (iii) Cable (iv) Switch

Description : Explain the function of : (i) DB (ii) Socket (iii) Cable (iv) Switch

Last Answer : i) Function of DB: ( Distribution Board or Box) :  * To distribute the load and provide the sub circuits in lighting load and power load. ii) Function of Socket:  * Availability of supply for connecting ... or load to carry the current. iv) Function of Switch: * To make the supply ON and OFF. 

Give one application of :(i) Mineral oil (ii) Varnish (iii) Synthetic oil (iv) Vegetable oil

Description : Give one application of :(i) Mineral oil (ii) Varnish (iii) Synthetic oil (iv) Vegetable oil 

Last Answer : i) Application of Mineral oil:  1. Used in transformer. 2. Used in switchgear 3. Used for circuit breaker 4. Used for capacitor 5. Used in paper insulated cables 6. It is used in Rector ii) ... Vegetable oil:  1. Used as a lubricant. 2. For illumination effect 3. Used for eating purpose. 

State the use of following: (i) Screw driver (ii) Nose pliers (iii) Wire gauge (iv) Test lamp

Description : State the use of following: (i) Screw driver (ii) Nose pliers (iii) Wire gauge (iv) Test lamp 

Last Answer : i) Screw Driver: Usually hand-operated, for turning screws with slotted heads for losing and tightening the screws.  ii) Nose pliers : To hold and tight the wires   iii) Wire Gauge: To ... supply voltage, Verification of voltage & current in the system and also check the open circuit fault. 

State any two applications of: (i) Ferromagnetic (ii) Paramagnetic material.

Description : State any two applications of: (i) Ferromagnetic (ii) Paramagnetic material. 

Last Answer : Applications of Ferromagnetic Materials:  1. In the transformer laminations. 2. In Electrical machines as a magnetic material. 3. In Magnetic poles of motor and generator 4. Magnetic ... : 1. Solid state MASER  2. Using adiabatic demagnetization low temperature can be achieved. 

(a) Draw a diagram of human respiratory system and label the following: (i) part where air is filtered by fine hair and mucus (ii) part which terminates in balloon – like structures (iii) balloon – like structures where exchange of gases takes place. (iv) part which separates chest cavity from abdominal cavity. (b) Why is the rate of breathing in aquatic organisms much faster than in terrestrial organisms? -Biology

Description : (a) Draw a diagram of human respiratory system and label the following: (i) part where air is filtered by fine hair and mucus (ii) part which terminates in balloon - like structures (iii) ... (b) Why is the rate of breathing in aquatic organisms much faster than in terrestrial organisms? -Biology

Last Answer : (a) (b) Quantity of dissolved oxygen is fairly low in water as compared to the amount of oxygen in air. Aquatic organisms therefore have to breath faster than terrestrial organisms to absorb the required amount of oxygen from the water.

State two insulators of following types along with their areas of application: (i) Class A (ii) Class E (iii) Class H

Description : State two insulators of following types along with their areas of application: (i) Class A (ii) Class E (iii) Class H 

Last Answer : Temperature class and withstand temperature ranges for them: 

Of all the gases present in the air, which one of the following is the highest in percentage? (a) Carbon dioxide (b) Hydrogen (c) Nitrogen (d) Oxygen

Description : Of all the gases present in the air, which one of the following is the highest in percentage? (a) Carbon dioxide (b) Hydrogen (c) Nitrogen (d) Oxygen

Last Answer : Ans:(c)

All gases except __________ shows a cooling effect during throttling process at atmospheric temperature and pressure. (A) Oxygen (B) Nitrogen (C) Air (D) Hydrogen

Description : All gases except __________ shows a cooling effect during throttling process at atmospheric temperature and pressure. (A) Oxygen (B) Nitrogen (C) Air (D) Hydrogen

Last Answer : (D) Hydrogen

The Correct Statements with reference to single called organisms are (i) Complex substances are not broken down in to simpler substances. (ii) Simple diffusion is sufficient to meet the requirement of exchange of gases. (iii) Specialized tissues perform different functions in the organism. (iv) Entire surface of the organism is in contact with the environment for taking in food. (a) (i) and (iii) (b) (ii) and (iii) (c) (ii) and (iv) (d) (i) and (iv)

Description : The Correct Statements with reference to single called organisms are (i) Complex substances are not broken down in to simpler substances. (ii) Simple diffusion is sufficient to meet the requirement of exchange of gases. (iii) Specialized ... b) (ii) and (iii) (c) (ii) and (iv) (d) (i) and (iv)

Last Answer : Answer: (c)

State any two applications of gaseous insulating material used in switchgears.

Description : State any two applications of gaseous insulating material used in switchgears. 

Last Answer : Applications of gaseous insulating material used in switchgears:   1. Non inflammable material (gas) in switchgear. 2. High dielectrical strength material in electrical machine. 3. As a cooling agent in circuit breaker

List any four applications of insulting material used in electrical fields.

Description : List any four applications of insulting material used in electrical fields. 

Last Answer : Applications of insulting material used in electrical fields: 1. In Electrical machines 2. In electrical transformers. 3. Transformer bushing 4. Insulators 5. Domestic equipment’s ( or any other equivalent applications) 6. Insulation on wires and cables 

State any two applications of each for the following types of electrical heating : (i) Direct resistance heating(ii) Indirect induction heating (iii) Direct.arc heating (iv) Dielectric heating

Description : State any two applications of each for the following types of electrical heating : (i) Direct resistance heating(ii) Indirect induction heating (iii) Direct.arc heating (iv) Dielectric heating

Last Answer : (i) Direct resistance heating:- 1. This type of heating used for industrial purpose 2. Salt bath heating: This utilized for the purpose of carbonizing, tempering, quenching and hardening of steel tools 3. ... purpose. 14)In foundry for heating of sand, core, which are used in molding processes.

Medicine technology have applications in the fields of i) Pharmacy ii) Prosthetics iii) Both A & B iv) None of these

Description : Medicine technology have applications in the fields of i) Pharmacy ii) Prosthetics iii) Both A & B iv) None of these

Last Answer : iii) Both A & B

Compare Brazing and Soldering on the basis of : (i) Temperature Used. (ii) Filler Material. (iii) Joint Strength (iv) Applications.

Description : Compare Brazing and Soldering on the basis of : (i) Temperature Used. (ii) Filler Material. (iii) Joint Strength (iv) Applications.

Last Answer : Comparison of Brazing and Soldering:

Differentiate between positive and negative feedback on the basis of . (i) overall phase shift (ii) voltage gain (iii) stability (iv) applications

Description : Differentiate between positive and negative feedback on the basis of . (i) overall phase shift (ii) voltage gain (iii) stability (iv) applications 

Last Answer : Compare positive feedback and negative feedback on the basis of: (i) Gain (ii) Bandwidth (iii) Phase shift (iv) Stability

Give the classification of transformer based on: i) Construction ii) Voltage level iii) Number of phases iv) Applications

Description : Give the classification of transformer based on: i) Construction ii) Voltage level iii) Number of phases iv) Applications

Last Answer : Classification of transformer based on: i) Construction: Shell type, Core type, Berry type ii) Voltage level: Step-Up, Step-Down, iii) Number of phases: Single phase, Three phase iv) Applications: Power T/F, Distribution T/F

Compare between BJT and FET on the basis of (i) Biolar/Unipolar (ii) Tharmal Runaway (iii) Noise (iv) Applications

Description : Compare between BJT and FET on the basis of (i) Biolar/Unipolar (ii) Tharmal Runaway (iii) Noise (iv) Applications

Last Answer : Parameter BJT FET Bipolar/Unipolar It is bipolar device i.e. current in this device is carried by electrons and holes. It is unipolar device i.e. current ... in oscilloscopes, electronic voltmeters and other measuring and testing equipment because of their high input impedance.

Which of the following is/are not the characteristics of red soils? 1. They are derived from weathering of old crystalline and metamorphic rocks 2. They contain iron oxides 3. They have high water retention capacity 4. They have high nitrogen content (a) II and III (b) Only III (c) Only IV (d) III and IV

Description : Which of the following is/are not the characteristics of red soils? 1. They are derived from weathering of old crystalline and metamorphic rocks 2. They contain iron oxides 3. They have high water retention capacity 4. They ... nitrogen content (a) II and III (b) Only III (c) Only IV (d) III and IV

Last Answer : Ans: (d)

Select the correct combination of the statements (i-iv) regarding the characteristics of certain organisms. (i) Methanogens are archaebacteria which produce methane in marshy areas. (ii) Nostoc is a filamentous blue-green alga which fixes atmospheric nitrogen. (iii)Chemosynthetic autotrophic bacteria synthesize cellulose from glucose. (iv) Mycoplasma lack a cell wall and can survive without oxygenThe correct statements are (a) (ii) and (iii) (b) (i),(ii) and (iii) (c) (ii), (iii) and (iv) (d) (i), (ii) and (iv)..

Description : Select the correct combination of the statements (i-iv) regarding the characteristics of certain organisms. (i) Methanogens are archaebacteria which produce methane in marshy areas. (ii) Nostoc is a filamentous blue-green alga which fixes ... iii) (c) (ii), (iii) and (iv) (d) (i), (ii) and (iv).

Last Answer : (d) (i), (ii) and (iv)

Alluvial soils are usually (i) Rich in nitrogen (ii) Poor in humus (iii) Highly fertile (iv) Easy to plough (1) (i), (ii) and (iv) (2) (ii), (iii) and (iv) (3) (i), (iii) and (iv) (4) (i), (ii) and (iii)

Description : Alluvial soils are usually (i) Rich in nitrogen (ii) Poor in humus (iii) Highly fertile (iv) Easy to plough (1) (i), (ii) and (iv) (2) (ii), (iii) and (iv) (3) (i), (iii) and (iv) (4) (i), (ii) and (iii)

Last Answer :  (i), (ii) and (iii)

Which of the following hydrogen halides react with `AgNO_3` to give a precipitate that dissolves in hypo solution ? (I)HCl (II)HF (III)HI (IV)HBr

Description : Which of the following hydrogen halides react with `AgNO_3` to give a precipitate that dissolves in hypo solution ? (I)HCl (II)HF (III)HI (IV)HBr

Last Answer : Which of the following hydrogen halides react with `AgNO_3` to give a precipitate that dissolves in hypo solution ? (I) ... II),(I) D. (II),(IV),(III)

Which of the following is true when HCL is passed through water. (i) It does not ionize in the solution as it is a covalent compound (ii) It ionizes in the solution (iii) It gives both hydrogen and hydroxyl ions in the solution (iv) It forms hydronium ion in the solution due to the combination of hydrogen ion with water molecule. (a) (i) only (b) (iii) only (c) (ii) and (iv) only (d) (iii) and (iv)

Description : Which of the following is true when HCL is passed through water. (i) It does not ionize in the solution as it is a covalent compound (ii) It ionizes in the solution (iii) It gives both hydrogen and hydroxyl ions in the solution ... ) (i) only (b) (iii) only (c) (ii) and (iv) only (d) (iii) and (iv)

Last Answer : (c) (ii) and (iv) only

Which two gases are used to disinfect water in sewage treatment facilities? w) helium and nitrogen x) ozone and chlorine y) oxygen and hydrogen z) nitrogen and chlorine

Description : Which two gases are used to disinfect water in sewage treatment facilities? w) helium and nitrogen x) ozone and chlorine y) oxygen and hydrogen z) nitrogen and chlorine 

Last Answer : ANSWER: X -- OZONE AND CHLORINE

The highest volume of gases in lower atmosphere is comprised of - (1) Hydrogen (2) Carbon dioxide (3) Oxygen (4) Nitrogen

Description : The highest volume of gases in lower atmosphere is comprised of - (1) Hydrogen (2) Carbon dioxide (3) Oxygen (4) Nitrogen

Last Answer : (4) Nitrogen Explanation: There are a number of atmospheric gases which make up air. In the lower atmosphere or troposphere, the main gases are nitrogen and oxygen, which make up 78% and 21% of the volume of air respectively. The remaining 1% of the atmospheric gases is made up of trace gases.

In deep-sea diving, divers use a mixture of gases consisting of oxygen and – (1) hydrogen (2) nitrogen (3) argon (4) helium

Description : In deep-sea diving, divers use a mixture of gases consisting of oxygen and – (1) hydrogen (2) nitrogen (3) argon (4) helium

Last Answer : (2) nitrogen Explanation: Air is not the "ideal" breathing mixture for diving as with a concentration of approximately 79 percent nitrogen, compressed air poses two potential problems for all divers: ... Nitrox, a gaseous mixture of nitrogen and oxygen. It is also known as 'Enriched Air.'

Which of the following gases is mixed with oxygen for breathing by divers in aqualungs? (1) Methane (2) Nitrogen (3) Helium (4) Hydrogen

Description : Which of the following gases is mixed with oxygen for breathing by divers in aqualungs? (1) Methane (2) Nitrogen (3) Helium (4) Hydrogen

Last Answer : (2) Nitrogen Explanation: For some diving, has mixtures other than normal atmospheric air (21 % oxygen, 78% nitrogen, 1% trace gases) can be used, so long as the diver is properly ... reducing the likelihood of decompression sickness or allowing longer exposure to the same pressure for equal risk.

Now-a-days yellow lamps are frequently used as street lights. Which of the following gases is used in these lamps? (1) Sodium (2) Neon (3) Hydrogen (4) Nitrogen

Description : Now-a-days yellow lamps are frequently used as street lights. Which of the following gases is used in these lamps? (1) Sodium (2) Neon (3) Hydrogen (4) Nitrogen

Last Answer : (1) Sodium Explanation: A sodium-vapor lamp is a gasdischarge lamp that uses sodium in an excited state to produce light. There are two varieties of such lamps: low pressure and high. ... High-pressure sodium lamps have a broader spectrum of light but poorer colour rendering than other types.

Which of the following gases do plants and trees give out during photosynthesis? A. Hydrogen B. Nitrogen C. Oxygen (Answer) D. Carbon dioxide

Description : Which of the following gases do plants and trees give out during photosynthesis? A. Hydrogen B. Nitrogen C. Oxygen (Answer) D. Carbon dioxide

Last Answer : C. Oxygen (Answer)

The atmosphere of moon consists of-------? A. 90% Hydrogen, 10% Nitrogen B. 80%Nitrogen, 20% Hydrogen C. 60% Nitrogen, 40%inert gases (Answer) D. None

Description : The atmosphere of moon consists of-------? A. 90% Hydrogen, 10% Nitrogen B. 80%Nitrogen, 20% Hydrogen C. 60% Nitrogen, 40%inert gases (Answer) D. None

Last Answer : C. 60% Nitrogen, 40%inert gases (Answer)

Pick out the wrong statement. (A) Addition of methane to the furnace atmosphere reduces decarburising by hydrogen (B) Nitrogen in presence of steam decor-burises high carbon steel, whereas hydrocarbon gases carburise the surface of steel at annealing temperatures (C) Active nitrogen (formed by cracking ammonia at the metal surface) cause nitride formation with increase in surface hardness (D) None of these

Description : Pick out the wrong statement. (A) Addition of methane to the furnace atmosphere reduces decarburising by hydrogen (B) Nitrogen in presence of steam decor-burises high carbon steel, whereas hydrocarbon ... the metal surface) cause nitride formation with increase in surface hardness (D) None of these

Last Answer : (D) None of these

A standardized base solution should be protected from which of the following gases? w) hydrogen x) carbon dioxide y) nitrogen z) argon

Description : A standardized base solution should be protected from which of the following gases? w) hydrogen x) carbon dioxide y) nitrogen z) argon

Last Answer : ANSWER: X -- CARBON DIOXIDE 

Which of the following gases cannot be collected by water displacement? w) Nitrogen x) Oxygen y) Hydrogen z) Hydrogen Chloride

Description : Which of the following gases cannot be collected by water displacement? w) Nitrogen x) Oxygen y) Hydrogen z) Hydrogen Chloride

Last Answer : ANSWER: Z -- HYDROGEN CHLORIDE

The highest volume of gases in lower atmosphere is comprised of (1) Hydrogen (2) Carbon dioxide (3) Oxygen (4) Nitrogen

Description : The highest volume of gases in lower atmosphere is comprised of (1) Hydrogen (2) Carbon dioxide (3) Oxygen (4) Nitrogen

Last Answer : Nitrogen

In deep-sea diving, divers use a mixture of gases consisting of oxygen and (1) hydrogen (2) nitrogen (3) argon (4) helium

Description : In deep-sea diving, divers use a mixture of gases consisting of oxygen and (1) hydrogen (2) nitrogen (3) argon (4) helium

Last Answer : nitrogen

Which of the following gases is mixed with oxygen for breathing by divers in aqualungs? (1) Methane (2) Nitrogen (3) Helium (4) Hydrogen

Description : Which of the following gases is mixed with oxygen for breathing by divers in aqualungs? (1) Methane (2) Nitrogen (3) Helium (4) Hydrogen

Last Answer : Nitrogen

Now-a-days yellow lamps are frequently used as street lights. Which of the following gases is used in these lamps ? (1) Sodium (2) Neon (3) Hydrogen (4) Nitrogen

Description : Now-a-days yellow lamps are frequently used as street lights. Which of the following gases is used in these lamps ? (1) Sodium (2) Neon (3) Hydrogen (4) Nitrogen

Last Answer : Sodium

What is the purpose of compressed air in SF6 breaker?

Description : What is the purpose of compressed air in SF6 breaker?

Last Answer : This used for drive for opening and closing of the contacts. (Arc quenching is taken care by SF6 gas) 

For interrupting capacitive currents which Circuit Breaker (CB) is used a) SF6 CB b) Oil CB c) Vacuum CB d) Air blast CB

Description : For interrupting capacitive currents which Circuit Breaker (CB) is used a) SF6 CB b) Oil CB c) Vacuum CB d) Air blast CB

Last Answer : Ans: Vacuum CB

Which of the following circuit breakers has high reliability and minimum maintenance ? (a) Air blast circuit breakers (b) Circuit breaker with SF6 gas (c) Vacuum circuit breakers (d) Oil circuit breakers

Description : Which of the following circuit breakers has high reliability and minimum maintenance ? (a) Air blast circuit breakers (b) Circuit breaker with SF6 gas (c) Vacuum circuit breakers (d) Oil circuit breakers

Last Answer : (b) Circuit breaker with SF6 gas

Which of the following medium is employed for extinction of arc in air circuit breaker ? (a) Water (b) Oil (c) Air (d) SF6

Description : Which of the following medium is employed for extinction of arc in air circuit breaker ? (a) Water (b) Oil (c) Air (d) SF6

Last Answer : (c) Air

SF6 gas (a) is yellow in colour (b) is lighter than air (c) is nontoxic (d) has pungent small (e) none of the above

Description : SF6 gas (a) is yellow in colour (b) is lighter than air (c) is nontoxic (d) has pungent small (e) none of the above

Last Answer : (c) is nontoxic

Explain with justification two uses of each of two following as an electrical conductor: (i) Brass (ii) Silver

Description : Explain with justification two uses of each of two following as an electrical conductor: (i) Brass (ii) Silver 

Last Answer :  (i) Brass:  Brass is an alloy of copper (60% ) and zinc ( 40%) ; the proportions of zinc and copper can be varied to create a range of brasses with varying properties. Brasses set ... electrical conductor:  1) In switches to minimize contact resistance 2) In measuring instruments 3) In relays 

Explain the use of the following components in electrical wiring system and give specification of each: (i) MCB (ii) ELCB

Description : Explain the use of the following components in electrical wiring system and give specification of each: (i) MCB (ii) ELCB

Last Answer : i) MCB (Miniature Circuit Breaker)  * MCB provides short circuit protection. * MCB provides overload protection * ELCB provides earth fault protection. * MCB is in series with load and ELCB is ... The low sensitivity ELCB are used for electrical machine the rating is in between the 3A to 10 A

Explain following wiring systems: (i) Concealed wiring (ii) Metal conduit wiring

Description : Explain following wiring systems: (i) Concealed wiring (ii) Metal conduit wiring 

Last Answer : i) Concealed wiring: The cost of wiring is very high. The PVC or VIR wires are carried through the channels made in ceilings and walls at the time of building construction. This wiring is slightly ... then the leakage current may pass through the conduit and hence now a days it is rarely used.

.Identify the physical and chemical changes from the following (i)Burning of magnesium in air (ii)Electrolysis of water (iii)Tarnishing of silver spoon (iv)Sublimation of iodine -Chemistry

Description : .Identify the physical and chemical changes from the following (i)Burning of magnesium in air (ii)Electrolysis of water (iii)Tarnishing of silver spoon (iv)Sublimation of iodine -Chemistry

Last Answer : (i) Burning of magnesium in air : Chemical change (ii) Tarnishing of silver spoon : Chemical change (iii) Sublimation of iodine : Physical change (iv) Electrolysis of water to form hydrogen and oxygen is also a chemical change.

Match the following columns and select the correct option. Column-I Column-II (A) 6-15 pairs of gill slits (i) Trygon (B) Heterocercal caudal fin (ii) Cyclostomes (C) Air bladder (iii) Chondrichthyes (D) Poison sting (iv) Osteichthyes(A) (B) (C) (D) (a) (ii) (iii) (iv) (i) (b) (iii) (iv) (i) (ii) (c) (iv) (ii) (iii) (i) (d) (i) (iv) (iii) (ii)

Description : Match the following columns and select the correct option. Column-I Column-II (A) 6-15 pairs of gill slits (i) Trygon (B) Heterocercal caudal fin (ii) Cyclostomes (C) Air bladder (iii) Chondrichthyes (D) Poison sting (iv) Osteichthyes ... (i) (ii) (c) (iv) (ii) (iii) (i) (d) (i) (iv) (iii) (ii)

Last Answer : (a) (ii) (iii) (iv) (i)

In flight, it is possible to: i. File an IFR flight plan ii. Modify an active flight plan iii. Cancel a VFR flight plan iv. Close a VFR flight plan (rules of the air ann2 3.3.5) a. i and ii b. i, ii, iii and iv c. ii, iii and iv d. i and iv

Description : In flight, it is possible to: i. File an IFR flight plan ii. Modify an active flight plan iii. Cancel a VFR flight plan iv. Close a VFR flight plan (rules of the air ann2 3.3.5) a. i and ii b. i, ii, iii and iv c. ii, iii and iv d. i and iv

Last Answer : b. i, ii, iii and iv

In flight, it is possible to: i. File an IFR flight plan ii. Modify an active flight plan iii. Cancel a VFR flight plan iv. Close a VFR flight plan (rules of the air ann2 3.3.5) a. i and ii b. i, ii, iii and iv c. ii, iii and iv d. i and iv

Description : In flight, it is possible to: i. File an IFR flight plan ii. Modify an active flight plan iii. Cancel a VFR flight plan iv. Close a VFR flight plan (rules of the air ann2 3.3.5) a. i and ii b. i, ii, iii and iv c. ii, iii and iv d. i and iv

Last Answer : b. i, ii, iii and iv

What are the recognized systems for pre heating of rails ends for AT Welding? (i) Oxygen –LPG & Compressed air petrol both* (ii) Only Oxygen –LPG (iii) Only Compressed air petrol both (iv) both are correct

Description : What are the recognized systems for pre heating of rails ends for AT Welding? (i) Oxygen –LPG & Compressed air petrol both* (ii) Only Oxygen –LPG (iii) Only Compressed air petrol both (iv) both are correct

Last Answer : ) Oxygen –LPG & Compressed air petrol both*