Biological functions of lipids include (A) Source of energy (B) Insulating material (C) Maintenance of cellular integrity (D) All of these

Biological functions of lipids include (A) Source of energy (B) Insulating material (C) Maintenance of cellular integrity (D) All of these
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Answer : D
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Routine maintenance of dry-type transformers should include ______________. A. preventing the entrance of water from broken pipe lines steam lines B. keeping protective surfaces and insulating bushings free of dirt and conductive debris C. periodic testing of insulation resistance with a megger D. all of the above

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Last Answer : Answer: D

Select the alternative giving correct identification and function of the organelle ‘A’ in the diagram. (a) Mitochondria - Produce cellular energy in the form of ATP (b) Golgi body - Provides packaging material (c) Lysosomes - Secrete hydrolytic enzymes (d) Endoplasmic reticulum - Synthesis of lipids

Description : Select the alternative giving correct identification and function of the organelle A' in the diagram. (a) Mitochondria - Produce cellular energy in the form of ATP (b) Golgi body - ... packaging material (c) Lysosomes - Secrete hydrolytic enzymes (d) Endoplasmic reticulum - Synthesis of lipids

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Complete maintenance of electrical motors should include periodic checks for machine _____________. A. vibration B. watertight integrity C. speed droop D. reactive power

Description : Complete maintenance of electrical motors should include periodic checks for machine _____________. A. vibration B. watertight integrity C. speed droop D. reactive power

Last Answer : Answer: A

Which of the following features is predicted by the Nicolson–Singer fluid mosaic model of biological membranes? (A) Membrane lipids do not diffuse laterally (B) Membrane lipid is primarily in a monolayer form (C) Membrane lipids freely flip-flop (D) Membrane proteins may diffuse laterally

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How do the lipids differ from the other organic compounds? a. They are the largest organic compounds. b. They are nonpolar compounds. c. They have no biological role. d. They are not used for energy storage.

Description : How do the lipids differ from the other organic compounds? a. They are the largest organic compounds. b. They are nonpolar compounds. c. They have no biological role. d. They are not used for energy storage.

Last Answer : b. They are nonpolar compounds.

All the following statements describing lipids are true except (A) They usually associate by covalent interactions (B) They are structurally components of membranes (C) They are an intracellular energy source (D) They are poorly soluble in H2O

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Last Answer : Answer : A

Which of the following statements, concerning the general maintenance of a brushless generator, is correct? A. Paint should be applied to insulating surfaces on an annual basis. B. Alcohol should be used to remove dust and grime from windings. C. High pressure air should be used to blow out carbon dust. D. Accessible generator parts should be wiped with a clean dry rag on a periodic basis.

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Last Answer : Answer: A

Proper storage battery maintenance includes ____________. A. keeping connections tight and casing surfaces clean B. making sure electrolyte level is below the separator plates C. insulating the terminals with naval jelly D. maintaining a high charging rate at all times

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Last Answer : c) It is a nucleotide source for ATP synthesis.

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Last Answer : (2) It functions as an electron carrier

What are Lipids? (1) Lipids are monosaccharide (2) Lipids do not provide energy to cells (3) Fruits are a good source of lipids (4) Cholesterol and trans fatty acids are types of Lipids

Description : What are Lipids? (1) Lipids are monosaccharide (2) Lipids do not provide energy to cells (3) Fruits are a good source of lipids (4) Cholesterol and trans fatty acids are types of Lipids

Last Answer : (4) Cholesterol and trans fatty acids are types of Lipids Explanation: Lipids are a group of naturally occurring molecules that include fats, waxes, sterols, fat-soluble vitamins (such as ... -, monoglycerides, and phospholipids), as well as other sterol= containing metabolites such as cholesterol.

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Last Answer : Cholesterol and trans fatty acids are types of Lipids

$ Those enzymes which are active inside a cell are called extra-cellular enzymes. ! Enzymes lower the rate of biological activities.

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Last Answer : (b) organismic level

What are the major functions of lipids in living organisms? -Biology

Description : What are the major functions of lipids in living organisms? -Biology

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Description : There are two properties of the cell necessary to maintain nonequilibrium cellular composition; the first is selectivity and the second is energy conversion. Which of the following statement(s ... transported via secondary active transport include hydrogen ions, calcium, amino acids and glucose

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Last Answer : (B) Subjectivity

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Description : What is the effect of heat on insulating material ?

Last Answer : With increasing temperature, the resistance of almost all solid insulators except Avro decreases. When the temperature drops again, the resistance increases.

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Description : Which of the following statements best describes the material known as varnished cambric? A. Felted asbestos sealed with varnish. B. Cotton cloth coated with insulating varnish. C. Rubber ... Paper impregnated with mineral oil, specially wrapped with nonmetallic tape, and coated with varnish.

Last Answer : Answer: B

A circuit breaker differs from a fuse in that a circuit breaker _____________. A. melts and must be replaced B. is enclosed in a tube of insulating material with metal ferrules at each end C. gives no visual indication of having opened the circuit D. trips to break the circuit and may be reset

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Last Answer : Answer: D

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Last Answer : (B) Glass wool and 85% magnesia

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Last Answer : silicone.

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Description : The critical radius of insulation for a spherical shell is (where, K = thermal conductivity of insulating material h0 = heat transfer coefficient at the outer surface) (A) K/h0 (B) 2K/h0 (C) h0 /K (D) h0 /2K

Last Answer : (B) 2K/h0

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Description : What do you understand by tan delta for a insulating material?

Last Answer : Tan delta measurement is done to find the qualities of insulating material. Tan delta is angle between current due to surface leakage or current due to capacitance and the capacitive current. That is Tan δ = Ir / Ic. 

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Description : Which of the following is the most widely used heat insulating material for pipelines carrying steam? (A) Tar dolomite bricks followed by asbestos (B) Fireclay refractory followed by aluminium sheet (C) Cotton followed by aluminium foil (D) 85% magnesia cement and glass wool

Last Answer : (D) 85% magnesia cement and glass wool

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Last Answer : outer conductor

A steam pipe is intended to be insulated with two layers of insulating materials of different thermal conductivities. For minimum heat transfer to take place (A) The better insulation material should be put just next to pipe (i.e., inside) (B) The better insulating material should be put outside (C) Either of the insulating material could be put on either side (D) Steam temperature is considered before deciding as to which insulating material is to be put inside (i.e., just next to the pipe)

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Last Answer : (A) The better insulation material should be put just next to pipe (i.e., inside)

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Last Answer : (A) Is an electrical insulating material

A steam carrying pipeline is insulated with two layers of insulating materials with the inferior insulation material forming the inner part. If the two insulating layers are interchanged, the heat conducted will (A) Increase (B) Decrease (C) Remain unaffected (D) May increase or decrease; depends on the thickness of each layer

Description : A steam carrying pipeline is insulated with two layers of insulating materials with the inferior insulation material forming the inner part. If the two insulating layers are interchanged, the heat conducted ... ) Remain unaffected (D) May increase or decrease; depends on the thickness of each layer

Last Answer : Option C

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Description : Carnot cycle efficiency depends upon  (a) properties of the medium/substance used  (b) condition of engine  (c) working condition  (d) temperature range of operation  (e) effectiveness of insulating material around the engine.

Last Answer : Answer : d

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Description : The disadvantage with paper as insulating material is (a) it is hygroscopic (6) it has high capacitance (c) it is an organic material (d) none of the above

Last Answer : (a) it is hygroscopic

The insulating material should have (a) low permittivity (b) high resistivity (c) high dielectric strength (d) all of the above

Description : The insulating material should have (a) low permittivity (b) high resistivity (c) high dielectric strength (d) all of the above

Last Answer : (d) all of the above

The insulating material for cables should (a) be acid proof (b) be non-inflammable (c) be non-hygroscopic (d) have all above properties

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Last Answer : (d) have all above properties

The insulating material for a cable should have (a) low cost (b) high dielectric strength (c) high mechanical strength (d) all of the above

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Last Answer : (d) all of the above

Mica is a (A) Dielectric material. (B) Insulating material. (C) Magnetic material. (D) Both insulating and dielectric material.

Description : Mica is a (A) Dielectric material. (B) Insulating material. (C) Magnetic material. (D) Both insulating and dielectric material.

Last Answer : (D) Both insulating and dielectric material.

If an insulating material is operated beyond the maximum allowable temperature, its life is (a) drastically increased (b) drastically reduced (c) unaffected (d) none of the above

Description : If an insulating material is operated beyond the maximum allowable temperature, its life is (a) drastically increased (b) drastically reduced (c) unaffected (d) none of the above

Last Answer : (b) drastically reduced

The insulating material used between the commutator segments is normally (a) graphite (b) paper (c) mica (d) insulating varnish

Description : The insulating material used between the commutator segments is normally (a) graphite (b) paper (c) mica (d) insulating varnish

Last Answer : Ans: c

State various thermal insulating materials. State any two properties of insulating material

Description : State various thermal insulating materials. State any two properties of insulating material

Last Answer : Thermal insulating materials: 1) Asbestos 2) Aluminum Foil 3) Thermocol 4) Saw dust 5) Cork board slabs 6) Foam glass 7) Rock Wool 8) Glass Wool 9) ... . h) Presence of Moisture: with the increase in moisture content, the coefficient of thermal conductivity rises greatly

Selection of Insulating Material Practical

Description : Selection of Insulating Material Practical 

Last Answer : Practical Significance The identification and selection of proper insulating materials is required for safe working of electrical appliances. The insulating material separates the electrical conductors ... the material for proper application and write the application in observation space.

Define dielectric failure of electrical insulating material.

Description : Define dielectric failure of electrical insulating material. 

Last Answer : Definition of dielectric failure of electrical insulating material. In the insulating material if the applied voltage is increased gradually then for certain value insulation will break down, ... material vanishes its insulating properties and starts conducting, also known as dielectric failure.

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

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

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Properties of Insulating Material

Description : Properties of Insulating Material

Last Answer : i. Thermal conductivity: Thermal conductivity of insulating material should be as possible to reduce the thickness of material. ii. Nonflammable: Insulating material should be fire proof and nonflammable ... and should available easily. v. Strength vi. Chemical Stability. vii. Moisture Resistance.

State failure phenomena observed in insulating material. State four reasons for failure of gaseous and solid dielectric materials.

Description : State failure phenomena observed in insulating material. State four reasons for failure of gaseous and solid dielectric materials. 

Last Answer : Failure phenomena in insulating material means the dielectric property fails :  The dielectric failure mean the dielectric strength of insulating material reduces due to high voltages or high ... 6. Due to poor maintenance of insulating material there may be possibility dielectric failure 

State two applications of : (i) PVC paper (ii) Porcelain with type of class based on withstand temperature is insulating material.

Description : State two applications of : (i) PVC paper (ii) Porcelain with type of class based on withstand temperature is insulating material. 

Last Answer :  (i) Application of PVC paper : 1. It is used in slot lining or motor winding insulation purpose 2. For Insulation of Transformer winding (ii) Application of Porcelain : 1. Mainly used for manufacturing ... on withstand temperature : * H' & C' Class of insulation i e. 180° and above 180°C 

State gaseous and liquid insulating material.

Description : State gaseous and liquid insulating material.

Last Answer : i) Gaseous insulating material : 1. Air 2. Nitrogen 3. Hydrogen 4. SF6 ii) liquid insulating material: 1. Transformer oil 2. Capacitor oil 3. Cable oil 4. Pyranol 5. Savotal 6. Savol 7. Vegetable oil 8. Silicon liquids

Explain the requirements of good insulating material.

Description : Explain the requirements of good insulating material.

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