Which of the following is not a ferromagnetic material ?
Material of construction of the electrode used in the electric resistance welding is__________?
Normalising does not __________ of a metal ?
Even though heat transfer co-efficient in boiling liquids is large, use of fins is advantageous, when the entire surface is exposed to __________ boiling ?
The wet bulb temperature is lower in dry air than in wet air at the same temperature. A dry bulb thermometer registers a higher temperature than a wet bulb thermometer except at __________ percent relative humidity ?
A polymer is termed as an ‘elastomer’, if its percentage elongation is more than 100%. An elastomer is termed as ‘rubber’ if its percentage elongation is more than __________ percent ?
The units of the rate constant for a second order reaction are__________?
Between 230 and 370°C, blue brittleness is caused in mild steel because of the__________?
Principal alloying element in Elinvar (used for making hair springs for watches) is__________?
Neutrons are present in all atoms except that of __________?
An atom bomb works on the principle of __________?
A psychrometer does not measure the __________ temperature of moist air?
With increase in __________ Knocking tendency in a spark ignition petrol engine decreases?
Propulsion of rocket follows from the__________?
Which of the following is an example of cathodic protection of metals against corrosion ?
The __________ of a double acting reciprocating pump as compared to the single acting pump will be almost double ?
Out of the following, the alloy which has equal percentage of constituents, is__________?
Leakage in a cooking gas cylinder is detected by__________?
Which of the following is not a characteristic observed in material failure by fatigue fracture ?
The bolt is subjected to __________ when the nut is tightened by putting the washer beneath it?
The joint for soldering is supported by binding wire made of __________?
Tesla metre per ampere (T. m/A) is the unit for the measurement of__________?
Consider the equilibrium A(g) + B(g) = AB(g). When the partial pressure of A is 10-2 atm, the partial pressure of B is 10-3 atm and the partial pressure of AB is 1 atm, the equilibrium constant ‘K’ is__________?
Eutectic reaction for iron-carbon system occurs at a temperature of __________ °C ?
Minimum thermal efficiency of a steam boiler may be around __________ percent ?
Corona discharge is related to the operation of a/an__________?
Silicon crystal can be converted to p-type semi-conductor by doping with__________?
Which of the following is normally not found in both the S.I. (petrol) & C.I. (diesel) engines ?
Vibration upto 100 kilo hertz can be most accurately measured by a __________ type accelerometer ?
Brinell Hardness Number (BHN) for talc is approximately in the range of __________?
Pressure exerted by a liquid depends upon its__________?
Drills are usually made of__________?
An ideal material for making cooking vessels should have__________?
Secondary hardening in steels arises out of the __________?
Which of the following is an example of stress corrosion ?
__________ joint is mostly used for joining pipes carrying water at low pressure ?
Silicon percentage in the silicon steel used for electrical appliances/equipments is__________?
Catalyst used in the ‘catalytic converter’ employed in automobile exhaust line for complete combustion/oxidation of carbon monoxide, nitrogen oxides and hydrocarbons is__________?
Annealing of cast iron__________?
Thermistors are used in __________ devices?
The dew point of moist air becomes __________ with decrease in its relative humidity ?
Basicity [%Cao + %MgO + %SiO2) of the slag in Indian blast furnace is in the range of__________?
The most commonly used moderator in nuclear power plants is__________?
__________ remains constant during the adiabatic cooling of moist air?
Dryness factor of steam is defined as the ratio of the mass of vapor in the mixture to the mass of the mixture. Dryness factor of steam is measured by a __________ calorimeter ?
Yield strength of a material is determined by the __________ test?
Hot extrusion process is not used for making__________?
In an eutectic system, two elements are completely__________?
Maraging steels derive their strength from the following mechanism ?
A solution which resists change in its pH value on addition of acid/alkali is called the __________ solution?
FeO (s) + CO (g) = Fe (s) + CO2 (g), k = 0. 435 at 1173E; at equilibrium, what will be the number of moles of CO gas required to reduce one mole of FeO at 1173 K ?

Pick out the wrong statement ?

A. Weldability of high carbon steel is poorer compared to low carbon steel
B. Invar is a magnetic alloy
C. Magnetic permeability of the diamagnetic material is less than one
D. Martenistic transformation never goes to completion (i.e., 100%) at room temperature

Correct Answer: Invar is a magnetic alloy ✔

Last Updated: February 10, 2019