A. Softens it to facilitate machining
B. Decreases the free carbon
C. Increases the strength
D. None of these
Related Mcqs:
- Addition of small amount of ________________ to grey cast iron is done to produce nodular grey cast iron ?
A. Manganese
B. Phosphorous
C. Magnesium
D. Chromium - Addition of silicon to cast iron ___________________?
A. Promotes graphite module formation
B. Improves its ductility
C. Does not promote graphite flakes formation
D. Increases the fluidity of molten metal - The lowest layer of atmosphere is known as the_____________________?
A. Stratosphere
B. Troposphere
C. Ionosphere
D. None of these - In sewage treatment, the detention period allowed for oxidation ponds ranges from _____________ weeks?
A. 1 to 2
B. 4 to 5
C. 9 to 10
D. 15 to 20 - Which of the following is not a secondary air pollutant ?
A. Ozone
B. Photochemical smog
C. Sulphur dioxide
D. All A., B. & C. - Which of the following acts as a natural source of air pollution ?
A. Forest fire
B. Deforestation
C. Volcanic eruption
D. None of these - A Carnot cycle consists of the following steps ?
A. Two isothermal and two isentropic
B. Two isobaric and two isothermal
C. Two isochoric and two isobaric
D. Two isothermals and two isochoric - What is the ratio of adiabatic compressibility to isothermal compressibility ?
A. 1
B. < 1
C. > 1
D. >> 1 - The partial molar enthalpy of a component in an ideal binary gas mixture of composition Z, at a temperature T and pressure P, is a function only of________________?
A. T
B. T and P
C. T, P and Z
D. T and Z - Absolute zero temperature signifies the ____________________?
A. Minimum temperature attainable
B. Temperature of the heat reservoir to which a Carnot engine rejects all the heat that is taken in
C. Temperature of the heat reservoir to which a Carnot engine rejects no heat
D. None of these
