SSC CGL Undated PYQs

Question 1

What is the SI unit of Power?

Accepted Answer

The SI unit of power is the Watt (W), which is equal to one joule per second. It measures the rate of energy transfer or work done.

Question 2

How many members of upper house (Rajya Sabha) can be nominated by President of India?

Accepted Answer

Under Article 80 of the Constitution, the President of India can nominate 12 members to the Rajya Sabha who have special knowledge or practical experience in art, literature, science, or social service.

Question 3

In the following question, select the odd word from the given alternatives. REGISTRATION NUMBER : EXAM DATE : 16-August-2017 EXAM NAME : SSC Examination TOTAL MARKS : 200 CANDIDATE NAME : EXAM START TIME : 16:15:00 SSC CGL 2017 TIER 1 AUGUST 16, 2017 SHIFT 3 QUESTION PAPER

Accepted Answer

Singer, Director, and Actor are professions or people working in the entertainment industry. Music is an art form or product, making it the odd one out.

Question 4

The flight fare between two cities is increased in the ratio 11:13. What is the increase (in Rs) in the fare, if the original fare was Rs 12100?

Accepted Answer

The original fare corresponds to 11 parts, so 1 part = 12100 / 11 = 1100. The increase is (13 - 11) = 2 parts. Thus, the increase is 2 × 1100 = Rs 2200.

Question 5

If x + [1/(x + 7)] = 0, then what is the value of x – [1/(x + 7)]?

Accepted Answer

Let y = x + 7. The equation becomes y + 1/y = 7. We need (y - 1/y) - 7. Since y - 1/y = √(7² - 4) = 3√5, the answer is 3√5 - 7.

Question 6

In triangle PQR, the sides PQ and PR are produced to A and B respectively. The bisectors of ∠AQR and ∠BRQ intersect at point O. If ∠QOR = 50°, then what is the value (in degrees) of ∠QPR?

Accepted Answer

For exterior angle bisectors meeting at O, the formula is ∠QOR = 90° - (∠QPR / 2). Substituting 50° gives 50° = 90° - ∠QPR/2, which means ∠QPR = 80°.

Question 7

Circum-centre of ∆ABC is O. If ∠BAC = 75° and ∠BCA = 80°, then what is the value (in degrees) of ∠OAC?

Accepted Answer

∠ABC = 180° - (75° + 80°) = 25°. The angle at the circumcentre ∠AOC = 2 × ∠ABC = 50°. In isosceles ∆AOC, ∠OAC = (180° - 50°) / 2 = 65°.

Question 8

If A = 2B = 4C; what is the value of A : B : C?

Accepted Answer

Let A = 2B = 4C = k. Then A = k, B = k/2, and C = k/4. The ratio A : B : C is k : k/2 : k/4. Multiplying by 4 gives 4 : 2 : 1.

Question 9

Asif is twice as good as workman as Bashir and together they finish a piece of work in 30 days. In how many days will Asif alone finish the work?

Accepted Answer

Asif's efficiency is 2, Bashir's is 1. Total efficiency = 3. Total work = 30 days × 3 = 90 units. Asif alone takes 90 / 2 = 45 days.

Question 10

In the following question, by using which mathematical operators will the expression become correct? 30 ? 6 ? 4 ? 5 ? 4 30 ? 6 ? 4 ? 5 ? 4

Accepted Answer

Substitute the operators from option 1: 30 - 6 = 4 × 5 + 4. Applying BODMAS, the RHS becomes 20 + 4 = 24, which perfectly matches the LHS (24).

Question 11

Select the odd letters from the given alternatives.

Accepted Answer

In all options except QRS, the letters are arranged in reverse alphabetical order (decreasing by 1). QRS is in forward alphabetical order (increasing by 1), making it the odd one.

Question 12

If x/3 - [5(7x/5 - 4/3)]/2 = -x/6, then what is the value of x?

Accepted Answer

Multiply the entire equation by 6 to clear denominators. We get 2x - 3(7x - 20/3) = -x. Simplifying gives -19x + 20 = -x, so 18x = 20, which means x = 10/9.

Question 13

What is the slope of the line perpendicular to the line passing through the points (-2, 3) and (2, 0)?

Accepted Answer

First, find the slope of the given line: m = (0 - 3) / (2 - (-2)) = -3/4. The perpendicular slope is the negative reciprocal, which is 4/3.

Question 14

Select the related word from the given alternatives. Cow : Calf :: Hen : ?

Accepted Answer

A calf is the young one of a cow. Following the same logic, a chick is the young one of a hen.

Question 15

A is 1.5 times efficient than B therefore takes 8 days less than B to complete a work. If A and B work on alternate days and A works on first day, then in how many days the work will  be completed?

Accepted Answer

Efficiency ratio A:B is 3:2, so time ratio is 2:3. Difference is 1 unit = 8 days. A takes 16 days, B 24. Total work=48. 2-day cycle=5 units. 9 cycles (18 days)=45 units. A finishes remaining 3 units on day 19.

Question 16

In Microsoft Excel, the ______() function is used to count the number of cells within a range that meet the given criteria.

Accepted Answer

The COUNTIF function in Excel counts the number of cells in a range that match a specific condition or criteria. COUNT only counts cells containing numbers.

Question 17

In the following question, select the related word pair from the given alternatives. Ammeter : Current : : ? : ?

Accepted Answer

An ammeter is an instrument used to measure electric current. Similarly, an anemometer is an instrument specifically used to measure the speed and direction of wind.

Question 18

If total time taken in engine and tyres is 127.5 hours, then what is the difference (in hours) in time taken by frame and glass respectively?

Accepted Answer

Using the provided chart data, find the ratio of the difference (Frame - Glass) to the sum (Engine + Tyres). Multiply this ratio by 127.5 to get exactly 35 hours.

Question 19

Marble comes under which category of rocks?

Accepted Answer

Marble is a metamorphic rock formed when limestone is subjected to high heat and pressure over time, causing its minerals to recrystallize.

Question 20

___________ gases absorb long wave (infrared) radiation from the earth and emit it again towards the earth.

Accepted Answer

Greenhouse gases (like CO2, methane, and water vapor) absorb infrared radiation emitted by the Earth and re-radiate it back, causing the greenhouse effect and warming the planet.