About this quiz
Full-length Paper I mock test: 30 general knowledge and 20 mental ability questions in 45 minutes, like the real exam.
This Lok Sewa practice set has 50 multiple-choice questions (Subject: General Knowledge and Mental Ability · For: Kharidar, Nayab Subba, Section Officer · Level: Medium). Take the quiz above first; after that, use the study list below to revise every question with its correct answer and a short explanation.
Study list: all 50 questions with answers and explanations
Which Article guarantees the Right against untouchability and discrimination?
- A) Article 22
- B) Article 24 ✔
- C) Article 26
- D) Article 29
Why: Article 24 prohibits untouchability and discrimination of any kind.
Which Article guarantees the Right to live with dignity?
- A) Article 16 ✔
- B) Article 17
- C) Article 18
- D) Article 20
Why: Article 16 is the first fundamental right. It also says no law shall provide for the death penalty.
Which wind system brings most of Nepal's rainfall?
- A) Western disturbances in winter
- B) Trade winds from the Arabian Sea
- C) North-east winds from Tibet
- D) Summer monsoon from the Bay of Bengal ✔
Why: Most rain falls from June to September with the summer monsoon from the Bay of Bengal.
What is the longitudinal extent of Nepal?
- A) 80°04' E to 88°12' E ✔
- B) 78°04' E to 86°12' E
- C) 82°04' E to 90°12' E
- D) 80°04' E to 84°12' E
Why: Nepal stretches from 80°04' East to 88°12' East, a span of about 8 degrees.
Which river was long known in India as the Sorrow of Bihar?
- A) Gandaki
- B) Koshi ✔
- C) Bagmati
- D) Karnali
Why: Frequent floods of the Koshi in Bihar earned it the name Sorrow of Bihar.
Rivers that start in the Chure hills are mostly of which kind?
- A) Fed by glaciers all year
- B) The longest rivers of Nepal
- C) Seasonal, swelling mainly during the monsoon ✔
- D) Rivers that flow north into Tibet
Why: Chure rivers are small and mostly seasonal, carrying a lot of water only in the rainy season.
Why was the capture of Nuwakot so important?
- A) It was the capital of the Malla kings
- B) It had the largest army in Nepal
- C) It controlled the trade route between Kathmandu and Tibet ✔
- D) It was the birthplace of Prithvi Narayan Shah
Why: Holding Nuwakot let Gorkha block the valley's trade with Tibet.
Where did Prithvi Narayan Shah die in 1831 BS?
- A) Gorkha Durbar
- B) Hanuman Dhoka, Kathmandu
- C) Kirtipur
- D) Devighat, Nuwakot ✔
Why: He died at Devighat in Nuwakot in 1831 BS (1775 AD).
What is the main job of the Control Unit (CU)?
- A) To direct and coordinate all parts of the computer ✔
- B) To store data permanently
- C) To print the results
- D) To perform all calculations
Why: The CU fetches and decodes instructions and tells other parts what to do; it does not process data itself.
In the basic working cycle of a computer, what comes between input and output?
- A) Storage
- B) Processing ✔
- C) Booting
- D) Printing
Why: The IPO cycle is Input, Process and Output; the computer processes the data before giving the result.
What does two-factor authentication add to a login?
- A) A longer user name
- B) A faster internet connection
- C) A free antivirus program
- D) A second proof, such as a code sent to the phone, besides the password ✔
Why: 2FA asks for a second proof, so a stolen password alone is not enough to log in.
Which malware spreads across networks by itself without needing a host file?
- A) Worm ✔
- B) Virus
- C) Spam
- D) Cookie
Why: A worm copies itself and spreads on its own; a virus needs to attach to a host file.
Where in the lungs does the exchange of oxygen and carbon dioxide take place?
- A) Trachea
- B) Alveoli ✔
- C) Larynx
- D) Diaphragm
Why: The tiny air sacs called alveoli are where oxygen enters the blood and carbon dioxide leaves it.
Which part of the blood helps it to clot at a wound?
- A) Platelets ✔
- B) Red blood cells
- C) Plasma
- D) Haemoglobin
Why: Platelets help form a clot that stops bleeding.
The formation and functions of a Provincial Public Service Commission are set by provincial law within the basis and standards set by what?
- A) A decision of the Chief Minister
- B) An order of the Supreme Court
- C) A rule made by the district office
- D) A federal law ✔
Why: Provincial law decides these matters, but it must follow the basis and standards laid down by federal law.
The idea that energy cannot be created or destroyed but only changed in form is called what?
- A) Newton's second law
- B) Ohm's law
- C) Law of conservation of energy ✔
- D) Law of inertia
Why: This is the law of conservation of energy, seen for example in a hydropower plant.
Who appoints the Chief Minister of a province?
- A) The Province Head ✔
- B) The Speaker of the Provincial Assembly
- C) The Prime Minister
- D) The Chief Justice
Why: The Province Head, who is appointed by the President, appoints the Chief Minister, usually the leader of the majority in the Provincial Assembly.
What is the chemical formula of baking soda?
- A) NaHCO₃ ✔
- B) Na₂CO₃
- C) NaCl
- D) NaOH
Why: Baking soda is sodium hydrogen carbonate, NaHCO₃; Na₂CO₃ is sodium carbonate (washing soda without its water) and NaOH is caustic soda.
In the food chain grass → deer → tiger, what is the deer?
- A) Producer
- B) Primary consumer (herbivore) ✔
- C) Decomposer
- D) Top carnivore
Why: The deer eats the producer (grass) directly, so it is a herbivore or primary consumer.
Dhorpatan, the only hunting reserve of Nepal, spreads over which districts?
- A) Dolpa, Jumla and Mugu
- B) Gorkha, Lamjung and Manang
- C) Baglung, Rukum (East) and Myagdi ✔
- D) Rasuwa, Nuwakot and Dhading
Why: Dhorpatan Hunting Reserve lies in Baglung, Rukum (East) and Myagdi, and blue sheep is the main game animal.
The districts Banke, Bardiya, Kailali and Kanchanpur, returned to Nepal in 1860 AD, are together called what?
- A) Madhesh Pradesh
- B) Purano Muluk
- C) Char Kosh Jhadi
- D) Naya Muluk ✔
Why: The British returned this western Tarai, called Naya Muluk, as a reward for Nepal's help during the 1857 Indian uprising.
Which of the following disqualifies a person from becoming a member of the Federal Parliament under Article 87?
- A) Holding an office of profit ✔
- B) Being a woman
- C) Being under 40 years of age
- D) Not owning land
Why: A member must not hold an office of profit, must be a citizen, meet the age rule and not be convicted of a crime of moral turpitude.
Who chairs the Constitutional Council under Article 284?
- A) The Prime Minister ✔
- B) The President
- C) The Chief Justice
- D) The Speaker
Why: The Prime Minister is the Chairperson of the six-member Constitutional Council.
Which country became the eighth member of SAARC in 2007?
- A) Myanmar
- B) Afghanistan ✔
- C) Iran
- D) China
Why: Afghanistan joined SAARC in 2007.
Nepal Sambat started in which year AD?
- A) 464
- B) 1200
- C) 1482
- D) 879 ✔
Why: Nepal Sambat began in 879 AD.
Which Article of the Constitution of Nepal provides for three levels of state structure?
- A) Article 56 ✔
- B) Article 50
- C) Article 74
- D) Article 217
Why: Article 56 sets out the federal, provincial and local levels.
In which year was Pluto reclassified as a dwarf planet?
- A) 1996
- B) 2006 ✔
- C) 2001
- D) 2012
Why: The International Astronomical Union reclassified Pluto in 2006.
An electric motor changes:
- A) Mechanical energy into electrical energy
- B) Electrical energy into mechanical energy ✔
- C) Heat into electricity
- D) Light into electricity
Why: A motor turns electrical energy into motion; a generator does the opposite.
The Rato Machhindranath chariot festival is held in:
- A) Lalitpur ✔
- B) Bhaktapur
- C) Kathmandu
- D) Dhulikhel
Why: Rato Machhindranath Jatra is a long chariot festival of Lalitpur.
Who is the President of the Asian Infrastructure Investment Bank (AIIB) whom Nepal's Finance Minister met in 2026?
- A) Ajay Banga
- B) Zou Jiayi ✔
- C) Scott Bessent
- D) Masato Kanda
Why: Zou Jiayi is the President of the AIIB.
The population of a town is now 26,450. It has grown at 15% per year for the last 2 years. What was it 2 years ago?
- A) 20,000 ✔
- B) 19,500
- C) 21,000
- D) 22,000
Why: 26,450 ÷ (1.15 × 1.15) = 26,450 ÷ 1.3225 = 20,000. Check: 20,000 to 23,000 to 26,450.
The fraction 3/8 is equal to what percent?
- A) 30%
- B) 37.5% ✔
- C) 35%
- D) 38.5%
Why: 3/8 × 100 = 300/8 = 37.5%.
Successive discounts of 25% and 10% are equal to a single discount of:
- A) 35%
- B) 32.5% ✔
- C) 32%
- D) 30%
Why: 25 + 10 − (25 × 10)/100 = 35 − 2.5 = 32.5%.
A carpet marked Rs 6,000 is sold after successive discounts of 10% and 5%. What is the selling price?
- A) Rs 5,100
- B) Rs 5,160
- C) Rs 5,400
- D) Rs 5,130 ✔
Why: 6,000 × 0.9 = 5,400; 5,400 × 0.95 = Rs 5,130.
Find the next term: 5, 15, 45, 135, ?
- A) 270
- B) 225
- C) 405 ✔
- D) 145
Why: Each term is multiplied by 3: 135 × 3 = 405.
If BAG is coded as 10 because 2 + 1 + 7 = 10, what is the code for HEN?
- A) 25
- B) 26
- C) 27 ✔
- D) 28
Why: H = 8, E = 5, N = 14, and 8 + 5 + 14 = 27.
What is the simple interest on Rs 15,000 at 8% per annum for 7 months?
- A) Rs 8,400
- B) Rs 840
- C) Rs 750
- D) Rs 700 ✔
Why: SI = 15,000 × 7/12 × 8/100 = 1,250 × 7 × 8/100 = Rs 700.
On Rs 10,000 at 10% per annum compounded yearly, what is the interest for the second year only?
- A) Rs 1,000
- B) Rs 2,100
- C) Rs 1,210
- D) Rs 1,100 ✔
Why: After year 1 the sum is 11,000; interest for year 2 = 11,000 × 10/100 = Rs 1,100.
Rs 24,000 is divided between two brothers in the ratio 5 : 7. What is the smaller share?
- A) Rs 14,000
- B) Rs 10,000 ✔
- C) Rs 12,000
- D) Rs 9,600
Why: Total parts = 12, one part = 24,000 ÷ 12 = 2,000. Smaller share = 5 × 2,000 = Rs 10,000.
What is the mean proportional between 9 and 49?
- A) 21 ✔
- B) 29
- C) 441
- D) 16
Why: Mean proportional = √(9 × 49) = √441 = 21.
Pipe A fills a tank in 10 hours and pipe B fills it in 15 hours. If both are opened together, how long will they take to fill it?
- A) 12.5 hours
- B) 5 hours
- C) 25 hours
- D) 6 hours ✔
Why: 1/10 + 1/15 = 3/30 + 2/30 = 1/6, so 6 hours.
10 men build a 40 m wall in 6 days. How many days will 15 men take to build a 90 m wall of the same kind?
- A) 9 days ✔
- B) 13.5 days
- C) 6 days
- D) 8 days
Why: D2 = M1 × D1 × W2/(W1 × M2) = 10 × 6 × 90/(40 × 15) = 5,400/600 = 9 days.
The average weight of 10 men increases by 1.5 kg when one man weighing 60 kg is replaced by a new man. The new man weighs:
- A) 61.5 kg
- B) 70 kg
- C) 75 kg ✔
- D) 90 kg
Why: New = 60 + 10 × 1.5 = 60 + 15 = 75 kg.
A batsman scores 85 runs in his 15th innings and increases his average by 3. His average after the 15th innings is:
- A) 40
- B) 42
- C) 43 ✔
- D) 45
Why: 85 − 14 × 3 = 85 − 42 = 43. (Check: 14 × 40 + 85 = 645 = 15 × 43)
A car covers 300 km in 5 hours. Its speed is:
- A) 50 km/h
- B) 55 km/h
- C) 60 km/h ✔
- D) 65 km/h
Why: Speed = 300 ÷ 5 = 60 km/h.
Thermometer : Temperature :: Barometer : ?
- A) Humidity
- B) Atmospheric pressure ✔
- C) Earthquake
- D) Speed
Why: A barometer measures atmospheric pressure, just as a thermometer measures temperature.
For a man, his sister's daughter is called:
- A) Bhatiji
- B) Buhari
- C) Bhanji ✔
- D) Phupu
Why: A sister's daughter is Bhanji. A brother's daughter is Bhatiji.
Ram walks 3 km North and then 4 km East. In which direction is he from the starting point?
- A) North-West
- B) North-East ✔
- C) South-East
- D) East
Why: He is north and east of the start, so he is in the North-East direction.
A square sheet is folded in half and then in half again, and one hole is punched. How many holes are there when it is opened?
- A) 2
- B) 3
- C) 8
- D) 4 ✔
Why: Two folds make 4 layers, and the punch goes through all of them.
What is the area of a rectangle 12 m long and 8 m wide?
- A) 40 m²
- B) 96 m² ✔
- C) 20 m²
- D) 84 m²
Why: Area = length × breadth = 12 × 8 = 96 m².