Magnetic permeability of iron is increased by its_____________________?

A. Decarburising
B. Alloying with cobalt
C. Purification
D. Alternate heating & cooling

The escape velocity of a body on earth which is independent of its mass is about ______________________ km/second?

A. 3
B. 7
C. 11
D. 15

Factor of safety is the ratio of the ___________________ stress to the working stress?

A. Tensile
B. Compressive
C. Yield
D. Bearing

Shaft/rotor speed is most accurately measured by a_________________?

A. Frequency counter
B. Tachometer
C. Strobometer
D. Speedometer

In chemical dehumidification process___________________?

A. Wet bulb temperature increases
B. Dry bulb temperature remains constant
C. Dew point temperature increases
D. Dry bulb temperature increases

The material used for coating the welding electrode is termed as the___________________?

A. Flux
B. Slag
C. Protective layer
D. Binder

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 ?

A. 1.0
B. 1.3
C. 2.3
D. 3.3

A solution which resists change in its pH value on addition of acid/alkali is called the ____________________ solution?

A. Neutral
B. Ideal
C. Buffer
D. Zero pH

Maraging steels derive their strength from the following mechanism ?

A. A fine, highly dislocated and strong martensite
B. Fine dispersions of inter-metallic of Fe, Ni, Ti etc
C. Fine dispersions of alloy carbides in a ferrite matrix
D. Fine dispersions of Fe3 C nucleated on dislocations in austenite

In an eutectic system, two elements are completely____________________?

A. Soluble in solid state
B. Insoluble in liquid state
C. Insoluble in both solid & liquid state
D. Soluble in liquid state