RBI JE flashcards

32 cards. Read the term and the definition here. The deck at the top of this page is optional.

M20 concrete mix proportion

Nominal mix M20 is 1:1.5:3 by volume (cement:sand:coarse aggregate); it corresponds to characteristic compressive strength of 20 N/mm² at 28 days.

Simply supported beam maximum moment

For a simply supported beam of span L carrying a central point load W, maximum bending moment is WL/4; for a uniformly distributed load w per unit length it is wL²/8.

Slump test purpose

The slump test measures the workability or consistency of fresh concrete; a 150 mm slump cone is used and higher slump indicates a wetter, more workable mix.

Safe bearing capacity

Safe bearing capacity is ultimate bearing capacity divided by a factor of safety; it is the allowable pressure that soil can carry without shear failure or excessive settlement.

Theodolite main use

A theodolite measures horizontal and vertical angles in surveying; it is used for traversing, setting out curves, and establishing alignment of roads, canals, and structures.

Transformer EMF equation

Transformer induced EMF is E = 4.44 f N Φm, where f is frequency, N is turns, and Φm is maximum flux; voltage ratio equals turns ratio.

Three-phase power formula

For a balanced three-phase load, active power P = √3 VL IL cos φ, where VL and IL are line voltage and current and cos φ is power factor.

Inductor and capacitor phase

In an AC circuit, current through an inductor lags voltage by 90 degrees, while current through a capacitor leads voltage by 90 degrees; impedance combines resistance and reactance.

Earthing purpose

Earthing connects exposed conductive parts to earth so fault current flows safely to ground, limiting touch voltage and protecting people from electric shock.

RBI establishment

The Reserve Bank of India was established on 1 April 1935 under the RBI Act, 1934; it was nationalised in 1949 and has its central office in Mumbai.

Repo rate meaning

Repo rate is the rate at which the RBI lends short-term funds to commercial banks against government securities; raising it generally tightens liquidity and controls inflation.

CRR and SLR

CRR is the share of net demand and time liabilities kept as cash with RBI; SLR is held in government securities and other approved liquid assets.

SEBI role

SEBI regulates the Indian securities market, protects investors, and promotes orderly development; it oversees stock exchanges, mutual funds, brokers, and listed companies.

Engineers Day India

Engineers Day in India is observed on 15 September, the birth anniversary of Sir M. Visvesvaraya, a noted civil engineer and statesman.

Scheduled bank

A scheduled bank is included in the Second Schedule of the RBI Act, 1934; it must satisfy paid-up capital and reserve criteria and enjoys RBI liquidity facilities.

Subject-verb agreement rule

A singular subject takes a singular verb and a plural subject takes a plural verb; phrases between subject and verb do not change the verb number.

Since versus for

Use since with a specific starting point of time, such as since 2010; use for with a duration, such as for five years.

Active to passive voice

In passive voice the object of the active sentence becomes the subject, and the verb becomes a form of be plus the past participle.

Article a versus an

Use a before a consonant sound and an before a vowel sound; the choice depends on pronunciation, not spelling, as in a university and an hour.

One of error rule

In the phrase one of the, the following noun is plural, but the verb agreeing with one is singular, as in one of the boys is absent.

At the eleventh hour idiom

The idiom at the eleventh hour means at the last possible moment; it describes something done just before a deadline or event.

Simple interest formula

Simple interest SI = P × R × T / 100, where P is principal, R is annual rate percent, and T is time in years; amount equals principal plus interest.

Compound interest formula

Compound amount A = P(1 + R/100)^T for annual compounding; compound interest is A minus P, and more frequent compounding increases the effective yield.

Profit and loss formulas

Profit percent equals (SP − CP)/CP × 100; loss percent uses CP − SP; selling price after a discount equals marked price minus discount.

Permutation formula

Number of permutations of r items chosen from n distinct items is nPr = n!/(n − r)!; order matters, unlike combinations where nCr = n!/[r!(n − r)!].

Combined work rate

If a person completes work in d days, the rate is 1/d per day; for two persons working together, combined rate is 1/d1 + 1/d2 and time is its reciprocal.

Train crossing time

Time for a train of length L to cross a pole is L/speed; to cross a platform of length P, time is (L + P)/speed, with consistent units.

Blood relation tree method

For blood relation puzzles, draw a family tree using symbols for male, female, marriage, and generations; then trace the asked relationship carefully.

Clock angle formula

The angle between clock hands is |30H − 5.5M| degrees, where H is hour and M is minutes; if the result exceeds 180, subtract it from 360.

Syllogism Venn method

In syllogism questions, draw Venn diagrams for each statement and test whether the conclusion is true in every possible diagram before marking it valid.

Coding letter positions

In coding-decoding, A=1, B=2, ..., Z=26; check forward, backward, and alternating shifts, and remember reverse position is 27 minus forward position.

Direction sense net move

For direction puzzles, assign north as positive y and east as positive x; a right turn from north is east, and net displacement uses Pythagoras for diagonal distance.