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MCQs

Total Questions : 5013 | Page 66 of 502 pages
Question 651. Pick out the wrong statement.
  1.    Copper is the metal having the highest electronic conductivity
  2.    Hardenability & weldability of metals are inversely related
  3.    Covalant bonding formed by sharing of electrons is present in all semi-conductor materials
  4.    Glass transition temperature applies to 'polymers' but not to 'glasses'
 Discuss Question
Answer: Option A. -> Copper is the metal having the highest electronic conductivity
Question 652. Protection of ship hulls against sea water corrosion is done by coating with zinc because of the fact that zinc compared to iron is
  1.    Reduced preferentially
  2.    Cheaper
  3.    Oxidised preferentially
  4.    Lighter
 Discuss Question
Answer: Option C. -> Oxidised preferentially
Question 653. Notched bar test is used for testing the __________ of a material.
  1.    Impact strength
  2.    Endurance limit
  3.    Machinability
  4.    Corrosion resistance
 Discuss Question
Answer: Option A. -> Impact strength
Question 654. There are one octahedral void and __________ tetrahedral void in the closest packing of atoms.
  1.    One
  2.    Two
  3.    Three
  4.    None of these
 Discuss Question
Answer: Option B. -> Two
Question 655. Air standard Otto cycle is more efficient than the diesel cycle for the same
  1.    Heat addition & compression ratio
  2.    Heat addition & pressure
  3.    Compression ratio & pressure
  4.    Cylinder dimension & rpm
 Discuss Question
Answer: Option A. -> Heat addition & compression ratio
Question 656. Out of the following, the dimensionless quantity is
  1.    Specific weight
  2.    Viscosity
  3.    Mach number
  4.    Density
 Discuss Question
Answer: Option C. -> Mach number
Question 657. Load cells used for the measurement of weight has
  1.    Compact & rugged construction with an accuracy of 0.1 to 1%
  2.    No moving parts and incurs negligible deflection under load
  3.    Provision of thermal compensation and is hermetically sealed
  4.    All of the above
 Discuss Question
Answer: Option D. -> All of the above
Question 658. __________ joint is usually used for joining cast iron pipes mostly used for temporary pipelines, where it may be necessary to dismantle & reassemble the pipeline very frequently.
  1.    Collar
  2.    Flanged
  3.    Bell and Spigot
  4.    Expansion
 Discuss Question
Answer: Option B. -> Flanged
Question 659. The main function of the deaerator used in the thermal power plant is to
  1.    Throttle down the steam pressure
  2.    Enhance feed water temperature
  3.    Remove dissolved gases from feed-water
  4.    Remove non-condensable gases from condenser
 Discuss Question
Answer: Option C. -> Remove dissolved gases from feed-water
Question 660. Austempering of steel requires.it to be heated to 875°C followed by sudden cooling to 250-525°C, thereby changing austenite to
  1.    Sorbite
  2.    Bainite
  3.    Martensite
  4.    Troostite
 Discuss Question
Answer: Option B. -> Bainite

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