RRB JE Mechanical Question Paper 2014 (Set-1) with Answer Key

RRB JE Mechanical Question Paper 2014 (Set-1) with Answer Key

11) Stroke of an I.C. engine equals

Answer is:

twice the crank radius

Stroke of an I.C. engine equals

12) The main constituent of moulding sand is

Answer is:

Silica

Explanation:

Silica sand in form of granular quarts is the main constituent of molding sand having enough refractoriness which can impart strength, stability and permeability to molding and core sand. But along with silica small amounts of iron oxide, alumina, lime stone (CaCO₃), magnesia, soda and potash are present as impurities.

13) Seam Welding is

Answer is:

a continuous spot welding process

14) Two transformers operating in the parallel will share the load depending upon their

Answer is:

Per Unit Impedance

15) Flow of electrons in circuit constitutes

Answer is:

an electric current