Ceramic compounds as compared to metallic compounds (A) Crystallise faster (B) Resist greater tensile stress at room temperature (C) Have higher melting temperature (D) Are better conductor of electricity at higher temperature

Ceramic compounds as compared to metallic compounds
(A) Crystallise faster
(B) Resist greater tensile stress at room temperature
(C) Have higher melting temperature
(D) Are better conductor of electricity at higher temperature
by

1 Answer

Answer :

Option C
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Related questions

Metalloids (A) Are good conductor of heat & electricity (B) Act as electron donors with metals & as electron acceptor with non metals (C) Are not necessarily solids at room temperature (D) Are compounds that exhibit both metallic & non-metallic properties to some extent and are exemplified by elements like germanium, silicon & boron

Description : Metalloids (A) Are good conductor of heat & electricity (B) Act as electron donors with metals & as electron acceptor with non metals (C) Are not necessarily solids at room temperature ... & non-metallic properties to some extent and are exemplified by elements like germanium, silicon & boron

Last Answer : D) Are compounds that exhibit both metallic & non-metallic properties to some extent and are exemplified by elements like germanium, silicon & boron

Ceramic nuclear metals compared to solid nuclear metals have (A) Higher melting points (B) Low strength at high temperature (C) More chances of radiation damage (D) Poorer corrosion resistance

Description : Ceramic nuclear metals compared to solid nuclear metals have (A) Higher melting points (B) Low strength at high temperature (C) More chances of radiation damage (D) Poorer corrosion resistance

Last Answer : (A) Higher melting points

Ceramic recuperators compared to metallic recuperators for the same duty (A) Are lighter (B) Occupy more space (C) Are less costly (D) Have higher pressure differential between flue gas & air side

Description : Ceramic recuperators compared to metallic recuperators for the same duty (A) Are lighter (B) Occupy more space (C) Are less costly (D) Have higher pressure differential between flue gas & air side

Last Answer : (B) Occupy more space

Solids which conduct electricity at higher temperature but not at lower temperature are called (1) super-conductor (2) metallic-conductor (3) semi-conductor (4) insulator

Description : Solids which conduct electricity at higher temperature but not at lower temperature are called (1) super-conductor (2) metallic-conductor (3) semi-conductor (4) insulator

Last Answer : (3) semi-conductor Explanation: Semiconductors are insulators at low temperatures and reasonably good conductors at higher temperatures. As temperature increases, the semiconductor material becomes a better and better conductor.

Solids which conduct electricity at higher temperature but not at lower temperature are called (1) super-conductor (2) metallic-conductor (3) semi-conductor (4) insulator

Description : Solids which conduct electricity at higher temperature but not at lower temperature are called (1) super-conductor (2) metallic-conductor (3) semi-conductor (4) insulator

Last Answer : semi-conductor

A metallic alloy in general as compared to their pure metal components is (A) More corrosion resistant (B) Having higher melting point (C) Having lower hardness, reactivity and fusibility (D) Having lower electrical conductivity

Description : A metallic alloy in general as compared to their pure metal components is (A) More corrosion resistant (B) Having higher melting point (C) Having lower hardness, reactivity and fusibility (D) Having lower electrical conductivity

Last Answer : (A) More corrosion resistant

Branched chain polymers compared to linear polymers have higher (A) Density (B) Tensile strength (C) Melting point (D) Degree of irregularity in atomic packing

Description : Branched chain polymers compared to linear polymers have higher (A) Density (B) Tensile strength (C) Melting point (D) Degree of irregularity in atomic packing

Last Answer : (D) Degree of irregularity in atomic packing

. In a linear polymer, the monomeric units are linked together to form long straight chains. The cross linked or branched chain polymers compared to linear polymers have higher (A) Densities (B) Melting point (C) Tensile strength (D) Hardness, rigidity & brittleness

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Last Answer : (D) Hardness, rigidity & brittleness

Branched chair polymers as compared to linear polymers have (A) Higher melting point (B) Higher tensile strength (C) Lower density (D) None of these

Description : Branched chair polymers as compared to linear polymers have (A) Higher melting point (B) Higher tensile strength (C) Lower density (D) None of these

Last Answer : (C) Lower density

Pick up the incorrect statement from the following: Tensile reinforcement bars of a rectangular beam (A) Are curtailed if not required to resist the bending moment (B) Are bent up at suitable places to serve as shear reinforcement (C) Are bent down at suitable places to serve as shear reinforcement (D) Are maintained at bottom to provide at least local bond stress

Description : Pick up the incorrect statement from the following: Tensile reinforcement bars of a rectangular beam (A) Are curtailed if not required to resist the bending moment (B) Are bent up at suitable ... to serve as shear reinforcement (D) Are maintained at bottom to provide at least local bond stress

Last Answer : Answer: Option C

18. The property of a liquid which enables it to resist tensile stress is called its surface tension. A) Agree B) Disagree

Description : 18. The property of a liquid which enables it to resist tensile stress is called its surface tension. A) Agree B) Disagree

Last Answer : A

The property of a fluid which enables it to resist tensile stress is known as (A) Compressibility (B) Surface tension (C) Cohesion (D) Adhesion

Description : The property of a fluid which enables it to resist tensile stress is known as (A) Compressibility (B) Surface tension (C) Cohesion (D) Adhesion

Last Answer : Answer: Option C

The main reason for providing number of reinforcing bars at a support in a simply supported beam is to resist in that zone (A) Compressive stress (B) Shear stress (C) Bond stress (D) Tensile stress

Description : The main reason for providing number of reinforcing bars at a support in a simply supported beam is to resist in that zone (A) Compressive stress (B) Shear stress (C) Bond stress (D) Tensile stress

Last Answer : Answer: Option C

The purpose of reinforcement in pre-stressed concrete is (A) To provide adequate bond stress (B) To resist tensile stresses (C) To impart initial compressive stress in concrete (D) All of the above

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Some substances are good conductor of electricity in both the solid and liquid states. These substances are generally-------? A. ionic substances B. metallic substances (Answer) C. molecular solids D. covalent network solids

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Last Answer : B. metallic substances (Answer)

Waxes present in petroleum products (A) Can be separated out by distillation(B) Are not soluble in them(C) Crystallise out at low temperature(D) Decrease their viscosity

Description : Waxes present in petroleum products (A) Can be separated out by distillation (B) Are not soluble in them (C) Crystallise out at low temperature (D) Decrease their viscosity

Last Answer : (C) Crystallise out at low temperature

Pick out the wrong statement pertaining to the properties of glasses. Glasses generally have (A) High electrical insulation properties (B) Sharp melting points (C) Low co-efficient of thermal expansion (D) Compressive strength much greater than their tensile strengths

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Last Answer : (B) Sharp melting points

Copper wires are generally used for electrical power transmission instead of iron wire because (1) copper is cheaper than iron (2) copper is lighter than iron (3) copper is a better conductor of electricity than iron (4) copper can take higher power than iron

Description : Copper wires are generally used for electrical power transmission instead of iron wire because (1) copper is cheaper than iron (2) copper is lighter than iron (3) copper is a better conductor of electricity than iron (4) copper can take higher power than iron

Last Answer : (3) copper is a better conductor of electricity than iron Explanation: Copper is generally preferred for electrical power transmission instead of iron because of its high electrical conductivity and low resistivity.

Copper wires are generally used for electrical power transmission instead of iron wire because : (1) copper is cheaper than iron (2) copper is lighter than iron (3) copper is a better conductor of electricity than iron (4) copper can take higher power than iron

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Last Answer : copper is a better conductor of electricity than iron

On a cold day when the room temperature is 15°C, the metallic cap of a pen becomes much colder than its plastic body, though both are at the same temperature of 15°C, because – (1) metals have higher thermal capacity than plastics (2) plastics have a lower density than metals (3) metals are good conductors of heat (4) plastics have a higher thermal conductivity than metals

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Last Answer : (3) metals are good conductors of heat Explanation: On a chilly day, the room temperature is lower than our body temperature. Since metals have a higher coefficient of thermal conductivity than plastic, they ... from our fingers will flow to the metal cap much more quickly than to the plastic body.

On a cold day when the room temperature is 15°C, the metallic cap of a pen becomes much colder than its plastic body, though both are at the same temperature of 15°C, because : (1) metals have higher thermal capacity than plastics (2) plastics have a lower density than metals (3) metals are good conductors of heat (4) plastics have a higher thermal conductivity than metals

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Last Answer : metals are good conductors of heat

Pressure Cooker cooks faster because (1) boiling point decreases with rise of pressure (2) it cooks the food at low pressure (3) higher temperature is attained for cooking (4) the material of the cooker is a good conductor

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Last Answer : higher temperature is attained for cooking 

A pebble mill (A) Is a ball mill (B) Employs flints or ceramic pebbles as the grinding medium (C) Is a tube mill lined with ceramic or other non-metallic liner (D) Both (B) and (C)

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Spark plugs are made of (A) High alumina ceramic (B) Metallic carbides (C) Corundum (D) Carborundum

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Last Answer : (A) High alumina ceramic

Which of the following is the most suitable for preheating combustion air above 650°C? (A) Regenerator (B) Metallic recuperator (C) Ceramic recuperator (D) None of these

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In the formation of cermets, the ratio of ceramic material to metallic material is usually 80:20. Which of the following is a cermet? (A) Zirconia (B) Alumina (C) Bakelite (D) Tungsten carbi

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Last Answer : Option D

Pick up the correct statement from the following: (A) The free quartz suddenly expands at a temperature lower than 600°C (B) The lime stone resists fire upto about 800°C and at higher temperature it splits into CaO and CO2 (C) The sand stone with silicates resist a fire in a better way (D) All the above

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Last Answer : Answer: Option D

Styrene butadiene rubber (SBR) as compared to natural rubber has (A) Poor tensile strength (B) Poorer resistance (C) Greater amount of heat build up heavy loading (D) All (A), (B) and (C)

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Last Answer : (D) All (A), (B) and (C)

Styrene-butadiene-rubber (SBR) as compared to natural rubber has (A) Poorer tensile strength (B) Poorer resistance to oxidation (C) Greater amount of heat build-up under heavy loading (D) All (A), (B) and (C)

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Last Answer : (D) All (A), (B) and (C)

Cox chart is useful in the design of (A) Distillation column (B) Evaporator (C) Dryer (D) Crystallise

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How compared with the melting points of ionic compounds the melting points of molecular solids tend to be?

Description : How compared with the melting points of ionic compounds the melting points of molecular solids tend to be?

Last Answer : Ionic compounds have a higher melting point.

Nylon-66 compared to nylon-6 has (A) Lower melting point (B) More abrasion resistant properties (C) Higher hardness (D) All (A), (B) and (C)

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Nylon-6 as compared to nylon-66 is (A) Harder (B) More abrasion resistant (C) Having higher melting point (D) None of these

Description : Nylon-6 as compared to nylon-66 is (A) Harder (B) More abrasion resistant (C) Having higher melting point (D) None of these

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Unsaturated oils compared to saturated oils have (A) Lower melting point & higher reactivity to oxygen (B) Higher melting point & higher reactivity to oxygen (C) Lower melting point & lower reactivity to oxygen (D) Higher melting point & lower reactivity to oxygen

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Last Answer : (A) Lower melting point & higher reactivity to oxygen

Fats as compared to oils have (A) More unsaturated glycerides of fatty acids (B) Less unsaturated glycerides of fatty acids (C) Much higher reactivity to oxygen (D) Lower melting point

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Last Answer : (B) Less unsaturated glycerides of fatty acids

Nylon-6 as compared to Nylon-66 is having higher (A) Hardness (B) Abrasion/resistance (C) Melting point (D) None of these

Description : Nylon-6 as compared to Nylon-66 is having higher (A) Hardness (B) Abrasion/resistance (C) Melting point (D) None of these

Last Answer : (D) None of these

A gingivally extended chrome cobalt cast clasp: A. Can extend 0.5 under the surveyor line B. Can extend 0.25 under the surveyor line C. Will resist deforming forces better compared to cast gold

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Last Answer : B. Can extend 0.25 under the surveyor line

Since fuse elements are made of zinc or any alloy of tin and lead, the melting point of the fuse element must be _____________. A. higher than that of copper B. lower than that of copper C. equal to that of copper D. reached when the conductor it is protecting becomes 'white hot.'

Description : Since fuse elements are made of zinc or any alloy of tin and lead, the melting point of the fuse element must be _____________. A. higher than that of copper B. lower than that of copper C. equal to that of copper D. reached when the conductor it is protecting becomes 'white hot.'

Last Answer : Answer: B

Give reason: Lemon juice kept in metallic cup will taste different but not in ceramic cup.

Description : Give reason: Lemon juice kept in metallic cup will taste different but not in ceramic cup.

Last Answer : Lemon juice contains citric acid which reacts with metallic cup and makes it toxic. So it tastes different. Ceramic cup does not react with acid.

A thermal nuclear reactor compared to a fast breeder reactor (A) Uses slower neutrons for fission (B) Uses faster neutrons for fission (C) Gives higher power density (D) Requires less fuel to run at the same power level

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The ability of a material to resist plastic deformation known as _____________ a) Tensile strength b) Yield strength c) Modulus of elasticity d) Impact strength

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Which of the following physical properties is TRUE of most dense ceramic materials? w) high tensile strength x) good ductility y) high compressive strength z) high electrical conductivity

Description : Which of the following physical properties is TRUE of most dense ceramic materials? w) high tensile strength x) good ductility y) high compressive strength z) high electrical conductivity

Last Answer : ANSWER: Y -- HIGH COMPRESSIVE STRENGTH

The non-living characteristic of viruses is – (1) ability to multiply only inside the host (2) ability to cause diseases in the host (3) ability to undergo mutation (4) ability to be crystallise

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Last Answer : (4) ability to be crystallise Explanation: Viruses are known as a connecting link between non-living and living being.

In regard to indirect compared to direct wax technique, what characteristics must the wax have:** A. Low temperature solidifying point B. Hard in room temperature C. Higher flow in room temperature

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Last Answer : B. Hard in room temperature

Nichrome wire is used in an electric heater because _______. (1) It has high resistance (2) It has high melting point (3) It can resist a current upto approx 5 amperes (4) For all of the above reasons

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Last Answer : (4) For all of the above reasons

If the depth of actual neutral axis of a doubly reinforced beam (A) Is greater than the depth of critical neutral axis, the concrete attains its maximum stress earlier (B) Is less than the depth of critical neutral axis, the steel in the tensile zone attains its maximum stress earlier (C) Is equal to the depth of critical neutral axis; the concrete and steel attain their maximum stresses simultaneously (D) All the above

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Last Answer : Answer: Option D

For a balanced section, the tensile stress in the reinforcement [ A ] reaches its allowable stress [ B ] is always less than its allowable stress [ C ] may be greater than its allowable stress [ D ] none of the above

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During a tensile test on a ductile material (A) Nominal stress at fracture is higher than the ultimate stress (B) True stress at fracture is higher than the ultimate stress (C) True stress at fracture is the same as the ultimate stress (D) None of these

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Last Answer : (B) True stress at fracture is higher than the ultimate stress

The transverse reinforcements provided at right angles to the main reinforcement (A) Distribute the load (B) Resist the temperature stresses (C) Resist the shrinkage stress (D) All the above

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