A. Plasticiser: increases the polymer strength
B. Heat stabiliser: increases the maximum service temperature
C. Fillers: Does not affect the property of polymer but increases its weight
D. Lubricants: increases the flexibility of polymers
Related Mcqs:
- While the thermosetting polymers are amorphous in nature, the thermoplastic polymers are either amorphous or crystalline. The crystalline polymers are characterized by the ?
A. Low impact strength
B. High flexibility
C. Better finish and surface appearance
D. High plastic deformation - Unbreakable crockeries are made from ______________ polymers?
A. Polystyrene
B. Melamine
C. Polystyrene
D. Polyurethane - Pick out the correct statement about the condensation?
A. Filmwise condensation gives a lower heat transfer rate than the dropwise condensation
B. Suitable coating or vapour additive is used to promote film wise condensation
C. If a condensing liquid does not wet the surface dropwise, even then condensation will take
place on it
D. Reynolds number of condensing liquid is based on its mass flow rate - Pick out the correct statement?
A. Hot worked materials are subjected to annealing to remove internal stresses
B. Annealing of steel hardens it slightly
C. Normalising of a material induces stresses
D. Tempering of a material improves ductility & toughness but reduces hardness & brittleness - Pick out the correct statement ?
A. Jet engine can work, where there is no atmosphere
B. Rocket engines cannot work, where there is no atmosphere
C. Rocket engines carry oxygen required for the combustion in the form of oxidiser
D. Jet engines also carry oxidiser - Evaporative cooling process employs a combination of cooling and humidification in which the____________________?
A. Sensible heat is added
B. Sensible heat is removed and the latent heat is added
C. Latent heat is removed
D. Sensible heat is added and latent heat is removed - Pipelines carrying various utilities in chemical industries are identified by their colour codes. The color of pipeline carrying steam is__________________?
A. Black
B. Silver grey
C. Green
D. Yellow - A compact estimate about the amount of materials handling between various work stations is obtained from the_____________________?
A. Gantt chart
B. Bin chart
C. String diagram
D. Travel chart - Pick out the wrong statement?
A. Copper is the metal having the highest electronic conductivity
B. Hardenability & Weldability of metals are inversely related
C. Covalent bonding formed by sharing of electrons is present in all semi-conductor materials
D. Glass transition temperature applies to ‘polymers’ but not to ‘glasses’ - Pick out the wrong statement ?
A. Lead can creep under its own weight at room temperature
B. The electrical conductivity of gold is considerably reduced by alloying additions due to the
decrease in electron movement
C. Recrystallisation temperature decreases with decrease in strain in a cold worked metal
D. With increase in temperature, the electrical conductivity of intrinsic semi-conductor will
