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SSC CHSL Tier 1 Full Mock Test: Practice Test 07

Question paper with answer key. Selection Pro

Q1. If CAMEL is coded as 3113512, then HORSE will be coded as:
  1. 81518195
  2. 81517195
  3. 81418195
  4. 81518185

Answer: (A) 81518195

Letters correspond directly to their positions in the alphabetical order: H(8), O(15), R(18), S(19), E(5) -> 81518195.

Q2. Select the missing number in the given series: 3, 7, 16, 32, 57, ?
  1. 85
  2. 91
  3. 93
  4. 98

Answer: (C) 93

The differences between adjacent terms are square numbers: +4 ($2^2$), +9 ($3^2$), +16 ($4^2$), +25 ($5^2$). Next difference is +36 ($6^2$), making $57 + 36 = 93$.

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: Ophthalmologist : Eyes :: Nephrologist : ?
  1. Heart
  2. Lungs
  3. Kidneys
  4. Liver

Answer: (C) Kidneys

An ophthalmologist specializes in eyes; a nephrologist specializes in kidneys.

Q4. Select the odd option among the following:
  1. Copper
  2. Zinc
  3. Iron
  4. Brass

Answer: (D) Brass

Brass is an alloy (mixture of copper and zinc), whereas Copper, Zinc, and Iron are pure metallic elements.

Q5. A person starts walking towards the East. After walking 20 meters, he turns to his left and walks 15 meters. Then he turns to his right and walks 10 meters. Finally, he turns to his right and walks 15 meters. How far is he from his starting point?
  1. 20 meters
  2. 25 meters
  3. 30 meters
  4. 35 meters

Answer: (C) 30 meters

Horizontal net displacement = $20\text{ m (East)} + 10\text{ m (East)} = 30\text{ meters}$. Vertical displacement cancels out ($+15\text{ m North} - 15\text{ m South} = 0\text{ m}$).

Q6. In a row of students, Anil is 12th from the left and Sunita is 18th from the right. When they interchange their positions, Anil becomes 22nd from the left. How many students are there in the row?
  1. 38
  2. 39
  3. 40
  4. 41

Answer: (B) 39

Total students = (Anil's new position from left + Sunita's original position from right) - 1 = $22 + 18 - 1 = 39$.

Q7. Which fundamental right in the Indian Constitution is referred to as the 'Heart and Soul of the Constitution' by Dr. B. R. Ambedkar?
  1. Right to Equality
  2. Right to Freedom of Religion
  3. Right to Constitutional Remedies
  4. Right against Exploitation

Answer: (C) Right to Constitutional Remedies

Dr. B. R. Ambedkar called Article 32 (Right to Constitutional Remedies) the heart and soul of the Constitution.

Q8. Who was the Governor-General of India during the Revolt of 1857?
  1. Lord Dalhousie
  2. Lord Canning
  3. Lord Curzon
  4. Lord Ripon

Answer: (B) Lord Canning

Lord Canning served as the Governor-General of India during the Sepoy Mutiny of 1857 and later became India's first Viceroy.

Q9. Which layer of the atmosphere contains the ozone layer that protects us from ultraviolet rays?
  1. Troposphere
  2. Stratosphere
  3. Mesosphere
  4. Thermosphere

Answer: (B) Stratosphere

The ozone layer is located in the lower portion of the Stratosphere.

Q10. Which instrument is used to measure electric current in a circuit?
  1. Voltmeter
  2. Ammeter
  3. Galvanometer
  4. Barometer

Answer: (B) Ammeter

An Ammeter is used to measure electric current flowing in amperes.

Q11. Which acid is present in ant sting?
  1. Acetic acid
  2. Formic acid
  3. Citric acid
  4. Lactic acid

Answer: (B) Formic acid

Ant stings contain Formic acid (Methanoic acid).

Q12. Who was the founder of the Brahmo Samaj in 1828?
  1. Swami Dayananda Saraswati
  2. Raja Ram Mohan Roy
  3. Swami Vivekananda
  4. Ishwar Chandra Vidyasagar

Answer: (B) Raja Ram Mohan Roy

Raja Ram Mohan Roy founded the Brahmo Samaj in Kolkata in 1828.

Q13. If the compound interest on a sum for 2 years at 10% per annum, compounded annually, is ₹525, find the simple interest on the same sum for the same period at the same rate:
  1. ₹480
  2. ₹500
  3. ₹510
  4. ₹520

Answer: (B) ₹500

CI rate equivalent for 2 years at 10% = $10 + 10 + \frac{100}{100} = 21\%$. So, $21\% = ₹525 \Rightarrow 1\% = ₹25$. SI for 2 years at 10% = $20\% = 20 \times 25 = ₹500$.

Q14. A train passes a 100 m long platform in 10 seconds and a telegraph post in 6 seconds. Find the length of the train:
  1. 120 m
  2. 150 m
  3. 180 m
  4. 200 m

Answer: (B) 150 m

Speed = $\frac{L}{6} = \frac{L + 100}{10} \Rightarrow 10L = 6L + 600 \Rightarrow 4L = 600 \Rightarrow L = 150\text{ m}$.

Q15. If $\cos \theta = \frac{4}{5}$, then find the value of $\tan \theta + \sec \theta$:
  1. 1
  2. 1.5
  3. 2
  4. 2.5

Answer: (C) 2

If $\cos \theta = \frac{4}{5}$, base = 4, hypotenuse = 5, perpendicular = 3. $\tan \theta = \frac{3}{4}$, $\sec \theta = \frac{5}{4}$. Sum = $\frac{3+5}{4} = 2$.

Q16. The areas of two similar triangles are $64\text{ cm}^2$ and $121\text{ cm}^2$. If the longest side of the larger triangle is $22\text{ cm}$, what is the longest side of the smaller triangle?
  1. 12 cm
  2. 14 cm
  3. 16 cm
  4. 18 cm

Answer: (C) 16 cm

Ratio of sides = $\sqrt{\frac{\text{Area}_1}{\text{Area}_2}} = \sqrt{\frac{64}{121}} = \frac{8}{11}$. Side = $\frac{8}{11} \times 22 = 16\text{ cm}$.

Q17. If $a + b + c = 9$ and $ab + bc + ca = 26$, find the value of $a^2 + b^2 + c^2$:
  1. 27
  2. 29
  3. 31
  4. 33

Answer: (B) 29

$(a + b + c)^2 = a^2 + b^2 + c^2 + 2(ab + bc + ca) \Rightarrow 81 = a^2 + b^2 + c^2 + 52 \Rightarrow a^2 + b^2 + c^2 = 29$.

Q18. By selling an article for ₹720, a trader incurs a loss of 10%. At what price should he sell it to gain 20%?
  1. ₹880
  2. ₹920
  3. ₹960
  4. ₹1000

Answer: (C) ₹960

Cost Price = $\frac{720}{0.90} = ₹800$. Target Selling Price = $800 \times 1.20 = ₹960$.

Q19. The average weight of 8 men increases by 1.5 kg when a man weighing 65 kg is replaced by a new man. Find the weight of the new man:
  1. 72 kg
  2. 75 kg
  3. 77 kg
  4. 80 kg

Answer: (C) 77 kg

Increase in total weight = $8 \times 1.5 = 12\text{ kg}$. Weight of new man = $65 + 12 = 77\text{ kg}$.

Q20. Select the correctly spelt word:
  1. Accommodate
  2. Acommodate
  3. Accomodate
  4. Acomodate

Answer: (A) Accommodate

'Accommodate' (with double 'c' and double 'm') is the correct spelling.

Q21. Select the synonym of the given word: CANDID
  1. Frank
  2. Deceitful
  3. Secretive
  4. Arrogant

Answer: (A) Frank

'Candid' means truthful and straightforward; 'Frank' is synonymous.

Q22. Select the antonym of the given word: OBSCURE
  1. Vague
  2. Clear
  3. Hidden
  4. Doubtful

Answer: (B) Clear

'Obscure' means unclear or uncertain; 'Clear' is its direct antonym.

Q23. Identify the segment in the sentence which contains a grammatical error: Neither John nor his friends is present at the party.
  1. Neither John
  2. nor his friends
  3. is present
  4. at the party

Answer: (C) is present

When subjects are joined by 'neither... nor', the verb agrees with the subject closest to it. Since 'his friends' is plural, the verb should be 'are' instead of 'is'.

Q24. Select the most appropriate idiom for the given meaning: 'To face a difficult situation courageously'
  1. Take the bull by the horns
  2. Cry over spilt milk
  3. Add fuel to the fire
  4. Spill the beans

Answer: (A) Take the bull by the horns

'Take the bull by the horns' means to deal with a difficult situation directly and bravely.

Q25. Select the option that can be used as a one-word substitute for: 'A speech made without previous preparation'
  1. Extempore
  2. Eulogy
  3. Soliloquy
  4. Oration

Answer: (A) Extempore

An 'Extempore' (or Impromptu) speech is spoken or done without preparation.