Sialon ceramic is used as
Which of the following belongs to thermoplastics?
1. Natural resins
2. Phenol formaldehyde
3. Polystyrene
4. Poly – vinyl – chloride
Which of the following statements are correct with reference to glass fibre reinforced composite?
1. They are isotropic.
2. Coefficient of expantion of fibre should match closely to that of the plastic material.
3. The fibre and plastic material should be chemically compatible to each other.
Injection moulding process used to produce thermoplastic matrix composites with fibre reinforcement normally gives
‘Whiskers’ are -
Which one of the following material is not a composite?
Windows of aeroplane are made of
Kevlar epoxy composite is widely used in
Which one of the following is correct? When ‘deverification’ of inorganic glasses means
What is the process by which two or more chemically different monomers are polymerized to form a cross link polymer together with a by product such as water or ammonia, known as?
In case of rubber, vulcanization refers to the process of producing a
Polyesters can be defined as the condensation products of
Structure of a polymer is
A binary alloy of Cu and Ni containing 20wt% Ni at a particular temperature coexists with solid phase of 26wt% Ni and liquid phase of 16wt% Ni. What is the weight ratio of solid phase and liquid phase?
Two metals A and B are completely immiscible in solid and liquid state. Melting point of A is 8000C and melting point of B is 6000C. They form eutectic at 2000C with 40% B and 60% A. the 50% B alloy contains.
Eutectoid reaction occurring at 7270C with 0.77% is
Cast iron possessing which one of the following metallic structure is best suited for damping capacity in engineering applications?
Zirconium is a material of choice for nuclear application as it:
Vanadium in high speed steel.
Spheroidal nodular graphite iron is designated as SG 500/7. Here ‘500’ and ‘7’ stand for
Additional of which one of the following elements, shifts the lower critical temperature line in iron-iron carbide diagram towards the higher side?
Interstitial Free Steels are used for
Babbit is an alloy of
Which one of the following cast irons consists of carbon in rosette form?
Which one of the following elements is a ferrite stabilizer?
