CSS · Federal Public Service Commission · 2026
Solved CSS MPT Everyday Science practice set from the 1000 Advanced Booklet, Q551–600 — 25 new MCQs with verified answers and explanations (coal liquefaction, LNG trade corrected, tidal and wave energy, Pakistan's oil province and electricity use, biofuels, solar and nuclear leaders). A practice compilation, not a past paper.
Paper Snapshot
Questions
25
Time
25
Minutes
Subjects
1
Topics
5
Read mode shows correct answers. Attempt mode hides answers, starts timer, and shows your result after submission.
About this paper
Part 12 (Q551–600) of the Sir Adnan '1000 Advanced Booklet Everyday Science' one-liner compilation (monster-data 'CSS MPT PAST PAPERS' pack). The booklet prints statement + answer only, so each item is published in the standard MCQ format with 3 authored plausible distractors under Anas's 2026-10-28 single-format decision and optionsSource recorded as 'authored'. Only 25 of 50 printed items are published. 24 restate facts already published in earlier parts of the same booklet and are cross-linked, not re-extracted: Q551 fossil-fuel disadvantage/pollution (Q351), Q553 inexhaustible solar (Q95), Q554 coal gasification (Q49), Q558 marsh gas methane (Q368), Q559 oil shale as an unconventional-oil/petroleum source (Q457), Q564 aviation fuel/kerosene (Q349), Q565 geothermal heat inside the Earth (Q37/Q315), Q568 biomass from plant waste (Q38/Q312), Q570 kilowatt-hour as the electricity unit (Q486), Q571 natural gas as methane gas (restating Q557 in this part), Q575 nuclear disadvantage/radioactive waste (Q453), Q578 solar panels of silicon (Q411), Q579 hydropower from moving water (Q34/Q310), Q580 wind energy from moving air (Q33), Q582 ethanol from sugarcane and corn (Q438), Q588 carbon dioxide as the main fossil-fuel greenhouse gas (Q442), Q589 acid rain from burning fossil fuels (Q89), Q590 coal burning releasing sulfur dioxide (Q88), Q591 petroleum as hydrocarbons (Q435), Q593 first commercial nuclear station Calder Hall, UK 1956 (Q475), Q594 biggest oil consumer in Asia, China (Q441), Q598 cleanest renewable solar (Q536), Q599 coal mainly carbon (Q331), Q600 renewable energy as the future alternative to fossil fuels (Q100). Printed Q592 (Dhulian 1949 as the first oil field after independence) is dropped as unanswerable as printed, repeating the claim already dropped in runs 42, 43 and 45: Renala 1925 is the oldest station/field context, Jabban/Malakand-I dates to 1937 with a 1952 expansion, and no single standard answer is identifiable. Three corrections, all flagged in keyFlag: Q562 biggest gas importer corrected from Japan to China (largest LNG importer in 2024, 78.6 mtpa vs Japan 67.7, IGU 2025); Q563 biggest LNG exporter corrected from Qatar to the United States (about 88 mt in 2024, EIA); Q573 highest oil-producing province corrected from Sindh to Khyber Pakhtunkhwa (49% of crude output in August 2026, Sindh 35%). One NOTE flag: Q574's Sindh-and-Balochistan coal-reserve answer is a location pair, with Thar (Sindh) holding the overwhelming bulk. This is a practice set, never titled as a past paper, and Q601–1000 remain for later runs.
Paper Controls
Subject 1
Topic Section
10 solved MCQs shown directly below
Correct Answer: High energy density
The main advantage of fossil fuels is their high energy density: a small volume of coal, oil or gas stores a large amount of usable energy, which is why they powered transport and industry so widely.
Correct Answer: Liquefaction
The process of converting coal into liquid fuel is called liquefaction: coal is broken down and hydrogenated to produce synthetic liquid fuels, distinct from gasification, which converts coal into gas.
Correct Answer: Drilling
The process of extracting oil from underground reservoirs is called drilling: wells are drilled into the reservoir rock so crude oil can flow or be pumped to the surface; refining and distillation happen afterwards.
Correct Answer: Methane
Natural gas is mainly composed of methane: methane (CH4) typically makes up 70-90% of natural gas, with smaller amounts of ethane, propane and butane.
Correct Answer: Crude oil
Tar sands are a source of crude oil: the bitumen in oil sands is extracted and upgraded into synthetic crude oil, most famously in Canada's Athabasca deposits.
Correct Answer: China
The biggest user of coal in the world is China: China burns more than half of all the coal consumed worldwide, mainly for electricity generation and steel production.
Correct Answer: China
The biggest gas importer in the world is China: China is the world's largest importer of natural gas overall (pipeline gas plus LNG) and the largest LNG importer, taking 78.6 million tonnes of LNG in 2024 ahead of Japan's 67.7 million tonnes.
Correct Answer: United States (USA)
The biggest LNG exporter in the world is the United States: the US shipped about 88 million tonnes of LNG in 2024, ahead of Australia (about 81 million tonnes) and Qatar (about 77 million tonnes).
Correct Answer: Briquettes
Compressed coal dust is called briquettes: fine coal dust is pressed, usually with a binder, into solid blocks for use as fuel.
Correct Answer: CNG
The cleanest fuel for vehicles, among the booklet's conventional options, is CNG: compressed natural gas burns more cleanly than petrol or diesel, producing less carbon monoxide, particulates and unburnt hydrocarbons.
Topic Section
5 solved MCQs shown directly below
Correct Answer: Tidal energy
The energy obtained from sea tides is tidal energy: the rise and fall of tides drives turbines, distinct from wave energy, which harnesses surface waves.
Correct Answer: Wave energy
The energy obtained from sea waves is wave energy: devices capture the motion of surface waves to generate electricity, distinct from tidal energy, which uses the rise and fall of tides.
Correct Answer: Ethanol & Biodiesel
Biofuels include ethanol and biodiesel: ethanol is an alcohol fuel made from crops, and biodiesel is made from vegetable oils or animal fats, both replacing or blending with petrol and diesel.
Correct Answer: Vegetable oils
Biodiesel is produced from vegetable oils (and animal fats): the oils are converted by transesterification into fatty-acid methyl esters that can run diesel engines.
Correct Answer: China
The country with the largest solar energy production is China: China has by far the world's largest installed solar capacity and generates more solar electricity than any other country.
Topic Section
5 solved MCQs shown directly below
Correct Answer: Domestic sector
The largest user of electricity in Pakistan is the domestic (household) sector: households took about 47.5% of electricity consumption in July-March FY2025-26 (39,472 GWh), ahead of industry at about 31.5%, per Pakistan's Economic Survey 2025-26.
Correct Answer: Khyber Pakhtunkhwa
The highest oil-producing province of Pakistan is now Khyber Pakhtunkhwa: KP accounted for 49% of Pakistan's crude oil production in August 2026 (Sindh 35%, Punjab 15%, Balochistan 1%), per the Pakistan Oil and Gas Exploration Activity Report.
Correct Answer: Sindh & Balochistan
Pakistan's main coal reserves are in Sindh and Balochistan: coal fields occur in both provinces, with Sindh's Thar field holding the overwhelming bulk of the country's reserves.
Correct Answer: Middle East
Pakistan imports most of its oil from the Middle East: Saudi Arabia and the United Arab Emirates are its principal crude suppliers, with the Gulf region dominating its import bill.
Correct Answer: Hydropower
The renewable energy most used in Pakistan is hydropower: large dams such as Tarbela and Mangla make hydro by far Pakistan's largest renewable electricity source, well ahead of solar and wind.
Topic Section
3 solved MCQs shown directly below
Correct Answer: Deep underground storage
Nuclear waste is usually stored in deep underground storage: high-level waste is isolated in deep geological repositories, hundreds of metres below the surface, to keep it away from people and the environment for thousands of years.
Correct Answer: Nuclear fusion
The energy produced by the sun is due to nuclear fusion: hydrogen nuclei fuse into helium in the sun's core, releasing the energy that reaches Earth as light and heat.
Correct Answer: United States (USA)
The country running the most nuclear reactors is the United States: the US operates about 93 commercial reactors, ahead of France (about 57) and China.
Topic Section
2 solved MCQs shown directly below
Correct Answer: Water electrolysis
Hydrogen gas can be produced from water by electrolysis: an electric current splits water (H2O) into hydrogen and oxygen, giving hydrogen without carbon emissions at the point of production.
Correct Answer: 80%
The share of fossil fuels in world energy is about 80%: coal, oil and natural gas together still supply roughly four-fifths of global primary energy, despite the growth of renewables.
Source & verification
Built by GK360 from verified bank questions — every answer rechecked before publishing. Where the source printed no options, the answer options were prepared by GK360; the questions and correct answers are the verified originals.
Questions
No. This is a practice set built from the Sir Adnan '1000 Advanced Booklet Everyday Science' one-liner compilation. It is labelled practice in the title, slug and paperType and must not be quoted as an official past paper.
This stretch of the booklet largely restates its own earlier parts: 24 of the 50 items repeat facts already published in Q1–550 of the same booklet (fossil-fuel pollution, inexhaustible solar, coal gasification, marsh gas, oil shale, aviation kerosene, geothermal heat, biomass, the kilowatt-hour, methane gas, nuclear waste, silicon solar cells, hydropower and wind basics, ethanol feedstocks, fossil-fuel greenhouse gas and acid rain, petroleum hydrocarbons, Calder Hall 1956, China's Asian oil consumption, cleanest renewable solar, coal's carbon, and renewable energy as the fossil-fuel alternative), so they are cross-linked to those parts rather than published twice. Printed Q592 (Dhulian 1949 as the first post-independence oil field) is dropped, repeating a claim already dropped in runs 42, 43 and 45. Only the 25 genuinely new items are published here.
The source prints statement + answer only, with no (a)-(d) options. Under Anas's 2026-10-28 single-format decision, each item is published in the standard MCQ format with 3 authored plausible distractors; the questions and answers are the booklet's, and every answer was verified as the standard answer. optionsSource is recorded as 'authored' so authored options are never mistaken for the paper's.
Q551–600's new items cover fossil-fuel energy density and coal liquefaction, oil drilling, methane as natural gas, tar sands, China's coal use, the corrected LNG trade leaders (China as importer, the United States as exporter), tidal and wave energy, Pakistan's domestic electricity use and corrected oil province, briquettes, nuclear-waste storage, solar fusion, biofuels and biodiesel feedstocks, water electrolysis, CNG, Middle East oil imports, the roughly 80% fossil-fuel share of world energy, and the solar and nuclear leaders plus hydropower in Pakistan. The booklet runs to 1000 items; Q601–1000 are held for later conversion runs in the same format.
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