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SSC CHSL Tier 1 Full Mock Test: Practice Test 04

Question paper with answer key. Selection Pro

Q1. If PEARL is coded as 16511812, then DIAMOND will be coded as:
  1. 4911315144
  2. 49113151414
  3. 4811315144
  4. 4911415144

Answer: (A) 4911315144

Letters are mapped directly to their positional alphabet values: D(4), I(9), A(1), M(13), O(15), N(14), D(4) -> 4911315144.

Q2. Select the missing number in the series: 2, 6, 12, 20, 30, ?
  1. 40
  2. 42
  3. 44
  4. 46

Answer: (B) 42

Differences are +4, +6, +8, +10. The next difference is +12, so 30 + 12 = 42 (Alternatively: $n^2 + n$).

Q3. Select the option that is related to the third term in the same way as the second term is related to the first term: France : Paris :: Japan : ?
  1. Beijing
  2. Seoul
  3. Tokyo
  4. Bangkok

Answer: (C) Tokyo

Tokyo is the capital of Japan, just as Paris is the capital of France.

Q4. A man walks 10 km South, turns right and walks 6 km, then turns left and walks 5 km. Which direction is he facing now?
  1. North
  2. South
  3. East
  4. West

Answer: (B) South

Facing South -> Turns Right (West) -> Turns Left (South). He is currently facing South.

Q5. Select the odd term from the given options:
  1. Square
  2. Triangle
  3. Cube
  4. Rectangle

Answer: (C) Cube

Cube is a 3D geometric shape, whereas Square, Triangle, and Rectangle are 2D shapes.

Q6. Statements: I. All cats are dogs. II. All dogs are mammals. Conclusions: 1. All cats are mammals. 2. Some mammals are cats.
  1. Only conclusion 1 follows
  2. Only conclusion 2 follows
  3. Neither conclusion follows
  4. Both conclusions follow

Answer: (D) Both conclusions follow

Since cats ⊂ dogs ⊂ mammals, both 'All cats are mammals' and 'Some mammals are cats' logically follow.

Q7. Which officer of the Indian Constitution is known as the 'Guardian of the Public Purse'?
  1. Finance Minister
  2. Comptroller and Auditor General (CAG)
  3. RBI Governor
  4. Prime Minister

Answer: (B) Comptroller and Auditor General (CAG)

The Comptroller and Auditor General (CAG) of India (Article 148) is known as the Guardian of the Public Purse.

Q8. Which Mughal Emperor built the famous Taj Mahal in Agra?
  1. Akbar
  2. Jahangir
  3. Shah Jahan
  4. Aurangzeb

Answer: (C) Shah Jahan

Shah Jahan built the Taj Mahal in memory of his wife Mumtaz Mahal.

Q9. In which state is the Kaziranga National Park located?
  1. Assam
  2. Uttarakhand
  3. Madhya Pradesh
  4. West Bengal

Answer: (A) Assam

Kaziranga National Park, famous for its one-horned rhinoceroses, is in Assam.

Q10. Deficiency of Vitamin C causes which disease?
  1. Rickets
  2. Scurvy
  3. Beriberi
  4. Night Blindness

Answer: (B) Scurvy

Vitamin C deficiency leads to Scurvy.

Q11. What is the SI unit of Work and Energy?
  1. Watt
  2. Newton
  3. Joule
  4. Pascal

Answer: (C) Joule

The SI unit for both work and energy is the Joule (J).

Q12. Who was the founder of the Maurya Empire?
  1. Ashoka
  2. Chandragupta Maurya
  3. Bindusara
  4. Brihadratha

Answer: (B) Chandragupta Maurya

Chandragupta Maurya founded the Maurya Empire with the assistance of Chanakya (Kautilya).

Q13. If $x - \frac{1}{x} = 5$, then the value of $x^2 + \frac{1}{x^2}$ is:
  1. 23
  2. 25
  3. 27
  4. 29

Answer: (C) 27

$x^2 + \frac{1}{x^2} = \left(x - \frac{1}{x}\right)^2 + 2 = 5^2 + 2 = 27$.

Q14. A shopkeeper marks an article 30% above its cost price and gives a discount of 10%. Find his profit percentage:
  1. 17%
  2. 18%
  3. 20%
  4. 22%

Answer: (A) 17%

Net Profit % = $30 - 10 - \frac{30 \times 10}{100} = 20 - 3 = 17\%$.

Q15. The mean proportional between 9 and 25 is:
  1. 12
  2. 15
  3. 18
  4. 205

Answer: (B) 15

Mean proportional = $\sqrt{a \times b} = \sqrt{9 \times 25} = \sqrt{225} = 15$.

Q16. A pipe can fill a tank in 10 hours and another pipe can empty it in 15 hours. If both pipes are opened together, how long will it take to fill the tank?
  1. 20 hours
  2. 25 hours
  3. 30 hours
  4. 35 hours

Answer: (C) 30 hours

Net rate = $\frac{1}{10} - \frac{1}{15} = \frac{3 - 2}{30} = \frac{1}{30}$. Time taken = 30 hours.

Q17. Find the value of $\sin^2 30^\circ + \cos^2 30^\circ + \tan 45^\circ$:
  1. 1
  2. 2
  3. 0
  4. 3

Answer: (B) 2

Since $\sin^2 \theta + \cos^2 \theta = 1$ and $\tan 45^\circ = 1$, the expression evaluates to $1 + 1 = 2$.

Q18. The volume of a sphere with radius 3 cm is ($ \pi = \frac{22}{7}$):
  1. 113.14 cm³
  2. 100.50 cm³
  3. 88.20 cm³
  4. 120.45 cm³

Answer: (A) 113.14 cm³

Volume = $\frac{4}{3} \pi r^3 = \frac{4}{3} \times \frac{22}{7} \times 27 \approx 113.14\text{ cm}^3$.

Q19. The average of first 10 natural numbers is:
  1. 5
  2. 5.5
  3. 6
  4. 6.5

Answer: (B) 5.5

Average of first $n$ natural numbers = $\frac{n + 1}{2} = \frac{10 + 1}{2} = 5.5$.

Q20. Select the correctly spelt word:
  1. Maintenance
  2. Maintanance
  3. Maintenence
  4. Mentenance

Answer: (A) Maintenance

'Maintenance' is the correct spelling.

Q21. Select the synonym of the given word: PRUDENT
  1. Careless
  2. Wise
  3. Foolish
  4. Reckless

Answer: (B) Wise

'Prudent' means acting with or showing care and thought for the future; 'Wise' is synonymous.

Q22. Select the antonym of the given word: BOISTEROUS
  1. Noisy
  2. Clamorous
  3. Quiet
  4. Lively

Answer: (C) Quiet

'Boisterous' means noisy, energetic, and rowdy; 'Quiet' is its direct antonym.

Q23. Identify the segment in the sentence which contains a grammatical error: She is more smarter than her elder sister.
  1. She is
  2. more smarter
  3. than her
  4. elder sister

Answer: (B) more smarter

Double comparatives are incorrect. 'More smarter' should be replaced by 'smarter'.

Q24. Select the most appropriate idiom for the given meaning: 'To reveal a secret unintentionally'
  1. Let the cat out of the bag
  2. Hit below the belt
  3. Burn the midnight oil
  4. Bite the dust

Answer: (A) Let the cat out of the bag

'Let the cat out of the bag' means accidentally revealing secret information.

Q25. Select the option that can be used as a one-word substitute for: 'A place where birds are kept'
  1. Apiary
  2. Aviary
  3. Aquarium
  4. Sanctuary

Answer: (B) Aviary

An 'Aviary' is a large cage or enclosure for keeping birds. (An 'Apiary' is for bees).