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WorksheetsMCQ week 5
Total questions: 15
Worksheet time: 3mins
What is the main advantage of non-fossil fuels over fossil fuels?
A) They burn at a higher temperature
B) They are unlimited in supply
C) They produce little to no carbon emissions
D) They contain more energy
Which gas is the main contributor to the greenhouse effect?
A) Oxygen (O₂)
B) Carbon dioxide (CO₂)
C) Nitrogen (N₂)
D) Hydrogen (H₂)
Which of the following is a liquid biofuel?
A) Natural gas
B) Biodiesel
C) Coal
D) Kerosene
What happens when low-viscosity fuel is used in a fuel pump?
A) It improves engine performance
B) It causes excessive wear due to poor lubrication
C) It increases fuel efficiency
D) It thickens over time
Why are abrasive particles harmful to engines?
A) They improve fuel combustion
B) They increase engine efficiency
C) They cause wear and damage to engine components
D) They help cool down the engine
What is the purpose of catalytic cracking in fuel processing?
A) To break down large hydrocarbons into smaller, usable fuels
B) To increase fuel density
C) To remove impurities from gasoline
D) To cool down the fuel before combustion
How does temperature affect the flashpoint of a fuel?
A) Higher temperatures lower the flashpoint, making fuel easier to ignite
B) Higher temperatures increase the flashpoint, making fuel harder to ignite
C) Flashpoint remains the same regardless of temperature
D) Flashpoint is only affected by pressure, not temperature
How does water in fuel tanks promote microbial growth?
A) Water reacts with fuel to create bacteria
B) Microbes feed on hydrocarbons and thrive in water layers
C) Water improves fuel quality, helping microbes multiply
D) Microbes cannot grow in fuel tanks
What is a major cause of sludge and asphaltene buildup in fuel systems?
A) Low temperature storage
B) Excess oxygen in fuel
C) Thermal stress and oxidation
D) Using clean fuel
How does slag formation impact engines and boilers?
A) It helps with fuel combustion
B) It increases engine lifespan
C) It clogs and damages heat transfer surfaces
D) It prevents corrosion
Cat Fines (Catalyst Fines - Al₂O₃, SiO₂)
Low cat fine levels can cause severe engine wear, leading to piston ring and cylinder liner damage.
True
False
. Ash Content
Non-combustible material in fuel, leading to slagging and deposits in the combustion chamber.
True
False
Ash and Inorganic Solids
Source: Fuel contamination during refining, storage, or transport.
Effects: Increased wear on piston rings, fouling of exhaust gas scrubbers.
True
False
Heavy Metals (Vanadium, Sodium, Lead, etc.)
•Source: Crude oil impurities, contamination from storage tanks.
•Effects: Formation of sludge, clogging of filters, corrosion in fuel tanks.
True
False
Sludge and Asphaltenes
Source: Residual fuel from catalytic cracking in refineries.
Effects: Fuel filter clogging, injector fouling, and poor combustion.
True
False
