Paint spray gun works on the principle of
Protection of ship hulls against sea water corrosion is done by coating with zinc because of the fact that zinc compared to iron is
Which of the following pairs regarding the effect of alloying elements in steels are not matched correctly ?
Pick out the wrong statement.
Young's modulus of elasticity of a material is the slope of the initial linear portion of the stress-strain curve. It decreases ap-preciablyby
The increase in hardness of metal due to its cold working is termed as the __________ hardening.
The unit of gc is
__________ is not a heat treatment process.
The term 'Value' in value engineering technique refers to the __________ cost of the product.
An atom bomb works on the principle of
__________ is not used as a material of construction in thermocouples.
Melting point & boiling points of liquid oxygen are respectively - 218.8°C & - 183°C, while the same for liquid nitrogen is - 210°C & - 195.8°C respectively. The difference in melting points of liquid oxygen & liquid nitrogen is not equal to 8.8
Eutectic reaction for iron-carbon system occurs at a temperature of __________ °C.
Coarse grained steels have
An ingot is hot forged to areduction in cross-section area. The percentage reduction in the volume for the above process is
Pick out the correct statement.
A material being tested for endurance strength is subjected to the __________ load.
Semi-conductors normally employ __________ bonding.
When water is sprayed on air, passing through an insulated chamber maintained at a temperature higher than the dew point of entering air but lower than its dry bulb temperature, then the air is
The entropy change for a spontaneous process is
Milligram of KOH required to saponify 1 gm of oil is called its __________ number.
Which of the following is an example of stress corrosion ?
Steel balls are manufactured by cold heading. After cold forming, they are subjected to
Flywheel is provided in a machine to
In cold working of metal as compared to its hot working
Volute casing of a centrifugal pump does not facilitate
Unit molar solution of __________ is the best conductor of electricity.
Heat transfer by radiation from a hot body will be most rapid, if its surface is __________ because of its higher emissivity.
Ageing of steel refers to the
High endurance limit of carburised machine parts is because of the fact that carburisation
The hardness of the lathe bed material is measured by the
Pick out the wrong statement about a fast breeder reactor.
FeO (s) + CO (g) = Fe (s) + CO2 (g), k =at 1173E; At equilibrium, what will be the number of moles of CO gas required to reduce one mole of FeO atK?
Free oxygen is removed from boiler feed water, because it
Out of the following, the materials having maximum magnetic permeability is
Nickel is a __________ material.
Grey cast iron (used for making underground water pipes and manhole covers) as compared to steel has higher
__________ is the process used for setting up compressive stresses in the surface of a metal to improve its fatigue strength.
Desert air coolers being rendered ineffective in rainy season is due to
A coal with high __________ content will ignite most easily.
The routing function in a production system design is concerned with the
Reduction reaction involves the
The phenomenon of strain-ageing is generally experienced with
Gas carrying pipelines are best joined by
The maximum axial compression stress during cold upsetting of a cylinderical rod of radius (r) occurs at
When dry bulb temperature & wet bulb temperature of moist air is the same, it means that the
Old cycle handles are coated with nickel using
CANDU type nuclear reactor using natural uranium as fuel is the extensively used nuclear reactor because of the fact that the
In __________ process, there is an increase in entropy with no degradation of energy.
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