RRB JE Previous Year GK Questions

Coulomb friction, also called dry friction, is the resistance that acts when two solid surfaces touch each other with no lubricant between them.

In electroplating the article to be coated is made the cathode, the plating metal serves as the anode, and both are dipped in an electrolyte containing a salt of that metal.

Balance is controlled by the inner ear, which holds the vestibular apparatus alongside the organ of hearing. It is made of three semicircular canals set at right angles to one another and two small sacs, the utricle and the saccule.

The speed of any wave is its frequency multiplied by its wavelength, so here 200 Hz times 2 m gives 400 metres per second.

HTTP, the HyperText Transfer Protocol, is the application-layer protocol a browser uses to ask a web server for a page and to receive the HTML, images and scripts that make it up.

HTML has no separate checkbox element at all. Every simple form control is written with the single input tag, and the type attribute decides what the browser draws, whether that is text, password, radio, checkbox, submit, file or hidden.

A concave lens, also called a diverging lens, spreads out the rays that fall on it and so can never bring them to a real focus.

Wetting is decided by a contest between two forces: cohesion, the attraction among the molecules of the liquid itself, and adhesion, the attraction between the liquid and the solid surface.

PPP is a data-link layer protocol that carries data directly between two nodes over a single link, such as a telephone line, a leased line or a serial cable.

Most renewable sources depend on the weather, so the power they give is intermittent rather than steady. Solar panels make nothing at night and little under thick cloud, wind turbines stop when the wind drops, and hydropower falls away in a weak monsoon.

Each hexadecimal digit stands for exactly four binary digits, so a two-digit hex number becomes an eight-bit binary number. Here C is 12 in decimal, which is 1100 in binary, and 6 is 0110.

The atomic number of an element is by definition the number of protons in its nucleus, so an atomic number of 11 means 11 protons.

Flash memory, ROM and a hard drive all keep their contents after the power is switched off, and that is exactly what non-volatile means.

A manual line break, also called a soft return, moves the text to the next line while keeping it inside the same paragraph, so the spacing before and after the paragraph and the list numbering are not disturbed.

The correct answer is B, all of the options, because each of the other three statements is a genuine rule of the language and the question asks which of them apply.

Java has exactly eight primitive data types, namely byte, short, int, long, float, double, char and boolean, and long double is not among them; it belongs to C and C++, where it denotes an extended precision floating point number, so the option is a deliberate trap for candidates who have…

The command javac is the Java compiler: it takes a source file with the extension.java, checks its grammar and converts it into a class file containing bytecode, the intermediate code that any Java Virtual Machine can run.

Liquefied petroleum gas is a mixture of these two saturated hydrocarbons, which are gases at ordinary pressure but turn liquid under moderate pressure, so a large quantity of fuel fits into a small cylinder; a strong-smelling compound is added so that a leak is noticed.

Article 360 has never been used. Even in 1991, when India faced a severe balance of payments crisis, had foreign exchange reserves for only a few weeks of imports and had to pledge gold to raise loans, the government chose economic reforms rather than a Financial Emergency.

On the night of 25 June 1975, President Fakhruddin Ali Ahmed proclaimed a National Emergency on the ground of "internal disturbance", on the advice of Prime Minister Indira Gandhi.