Secondary hardening in steels arises out of the
Precipitation of fine alloy carbides at high temperatures
Refinement of ferrite grain size by working
Decomposition of retained austenite upon heat treatment
Precipitation of complex inter-metallic upon heat treatment
Also checkout these categories
DBMS MCQ Nature and Scope of Biology MCQ Microsoft PowerPoint MCQ Accounts Fundamental MCQ World History MCQ Letter and Symbol Series MCQ Rearrangement Set 12 MCQ Pteridophyta MCQ Electro-Chemistry MCQ Skin Anatomy and Physiology MCQ Physiological and Anatomy of Plants MCQ Current Affairs May 2017 MCQ
- Cementite is in the lamellar form in the __________ phase of steel.
- The pressure outside a bubble/droplet of liquid is __________ the internal pressure.
- Photographic plates are coated with
- A fire tube boiler is limited to a maximum steam pressure of about __________ kg/cm2.
- Fahrenheit and Centigrade scales have the same readings at
- On decreasing the grain size of a polycrystalline material, the property most likely to deteriorate…
- __________ fluid force is not considered in the Navier-Stokes equation.
- A reduction in thermal resistance during heat transfer does not occur in the
- Energy of the sun arises mainly from __________ reactions.
- Thermit welding uses the following energy source.
- When an isolated thermodynamic system executes a process,
- Which of the following are considered applications of ultrasonic testing?
- When the wet steam is throttled but still remains wet at the exit of the throttle valve, then its temperature…
- Which of the following varies as the square root of oil pressure during atomisation of fuel oil through…
- Temper brittleness of a material can be fairly detected by the __________ test.
- Case hardening is not done by
- __________ glass is used in the mercury in glass thermometer meant for measuring a temperature of 500°C.
- A psychrometer does not measure the __________ temperature of moist air.
- Specific gravity of a metal, which weighs 5 kg in air and 4 kg when submerged in water, will be
- __________ can replace tungsten in high speed steel.
- As the fluid flow rate increases, the float of the Rotameter
- The mechanism involved in the removal of metal in drilling operation is by
- Sacrificial anode method is used in the protection of pipelines which are buried underground. Sacrificial…
- In connection with corrosion of metals, passivation is the process that
- The dimensional formula of bulk modulus of elasticity is same as that of the
- Normalising of a casting does not
- Which of the following rays has the least wavelength?
- The most suitable material for die casting is
- Which of the following approaches the ideal gas behaviour most closely?
- While the oxy-acetylene flame produces a temperature of 3200°C, the temperature produced by oxy-hydrogen…