MCQs
Total Questions : 350
| Page 32 of 35 pages
Answer: Option B. -> Do not become hard with the application of heat and pressure and no chemical change occurs
Thermoplastic materials can be cooled and heated several times without any change in their chemistry or mechanical properties.
A thermoplastic, or thermosoftening plastic, is a plastic polymer material that becomes pliable or moldable at a certain elevated temperature and solidifies upon cooling.
Thermoplastic materials can be cooled and heated several times without any change in their chemistry or mechanical properties.
A thermoplastic, or thermosoftening plastic, is a plastic polymer material that becomes pliable or moldable at a certain elevated temperature and solidifies upon cooling.
Answer: Option D. -> 1.0%
Heavy duty leaf and coil springs contain 1.0% carbon
Heavy duty leaf and coil springs contain 1.0% carbon
Answer: Option A. -> 0.1%
Cold rolled steel sheets contains 0.1% carbon
Cold Rolled Steel A rolling process at temperatures that are close to normal room temperature are used to create cold rolled steel. This increases the strength of the finished product through the use of strain hardening by as much as 20 %
Cold rolled steel sheets contains 0.1% carbon
Cold Rolled Steel A rolling process at temperatures that are close to normal room temperature are used to create cold rolled steel. This increases the strength of the finished product through the use of strain hardening by as much as 20 %
Answer: Option B. -> 30 : 70
Admiralty brass used for steam condenser tubes contains 30% of copper and 70% of zinc
Admiralty brass used for steam condenser tubes contains 30% of copper and 70% of zinc
Answer: Option A. -> 50 : 20 : 20 : 10
The composition of alnico alloys is typically 50% of Iron, 20% of nickel,20% of aluminium and 10% of cobalt
The composition of alnico alloys is typically 50% of Iron, 20% of nickel,20% of aluminium and 10% of cobalt
Answer: Option B. -> Slowly in the furnace
In full annealing, the hypo eutectoid steel is heated from 30°C to 50°C above the upper critical temperature and then cooled Slowly in the furnace
In full annealing, the hypo eutectoid steel is heated from 30°C to 50°C above the upper critical temperature and then cooled Slowly in the furnace
Answer: Option B. -> Soft
Steel containing ferrite and pearlite is soft.
Ferrite is a form of pure iron with a body-centered cubic crystal structure and occurs in low-carbon steel.
Pearlite is a finely laminated mixture of ferrite and cementite present in cast iron and steel, formed by the cooling of austenite.
Steel containing ferrite and pearlite is soft.
Ferrite is a form of pure iron with a body-centered cubic crystal structure and occurs in low-carbon steel.
Pearlite is a finely laminated mixture of ferrite and cementite present in cast iron and steel, formed by the cooling of austenite.
Answer: Option D. -> LD process
LD process is a steel making process is being adopted at Rourkela (in India) Steel Plant
LD process is a steel making process is being adopted at Rourkela (in India) Steel Plant
Answer: Option C. -> Nitriding
Nitriding has a different hardening mechanism than the one caused by quenching a steel with an elevated level of carbon.
Instead, the hardening is caused by the fine scale precipitation of alloying element nitrides which does not require quenching.
Nitriding has a different hardening mechanism than the one caused by quenching a steel with an elevated level of carbon.
Instead, the hardening is caused by the fine scale precipitation of alloying element nitrides which does not require quenching.
Answer: Option D. -> Is produced by small additions of magnesium (or creium) in the ladle. Graphite is in nodular or spheroidal form and is well dispersed throughout the material
Ductile cast iron Is produced by small additions of magnesium (or creium) in the ladle. Graphite is in nodular or spheroidal form and is well dispersed throughout the material
ductile iron has much more impact and fatigue resistance, due to its nodular graphite inclusions.
Ductile cast iron Is produced by small additions of magnesium (or creium) in the ladle. Graphite is in nodular or spheroidal form and is well dispersed throughout the material
ductile iron has much more impact and fatigue resistance, due to its nodular graphite inclusions.
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