Posted On : 03-Jul-2018

Q1: Which of the following is the most abundant gas in atmosphere?

• A. Oxygen
• B. Nitrogen
• C. Helium
• D. Hydrogen

Q2: Which of the following metals is used in the filaments of electric bulbs?

• A. Titanium
• B. Solder
• C. Tungsten
• D. Nichrome

Q3: Which one among the following is strong smelling agent added to LPG to help in the detection of gas leakage?

• A. Ethanethiol
• B. Ethanol
• C. Methane
• D. Chloroform

Q4: Which of the following metals is used for making boats because it does not corrode by seawater?

• A. Titanium
• B. Tungsten
• C. Nickel
• D. Antimony

Q5: Which of the following alloys is made from the combination of copper, tin and zinc?

• A. Brass
• B. Bronze
• C. Solder
• D. Gunmetal

Q6: Which of the following gases is used in gas welding and also artificial ripening of fruits?

• A. Methane
• B. Acetylene
• C. Propane
• D. Ethane

Q7: Which of the following gases is mixed with oxygen being given to patients with restricted breathing?

• A. Helium
• B. Hydrogen
• C. Water vapour
• D. Argon

Q8: Which of the following is used as filament in electrical heaters because of its resistance to oxidation?

• A. Lead
• B. Nichrome
• C. Nickel
• D. Titanium

Q9: Solder, which is used to join electronic components on a circuit board is an alloy of

• A. Tin and copper
• B. Lead and iron
• C. Copper and Zinc
• D. Tin and lead

Q10: Which of the following gases is used in refrigeration?

• A. Neon
• B. Argon
• C. Freon
• D. Helium