Q. Which of the following is not a characteristic observed in material failure by fatigue fracture ?

View solution

Q. A polymer is termed as an 'elastomer', if its percentage elongation is more than 100%. An elastomer is termed as 'rubber' if its percentage elongation is more than __________ percent.

View solution

Q. Current employed in resistance welding ranges from __________ kVA/cm² .

View solution

Q. Coating thickness in case of galvanising of steel sheet generally corresponds to the deposition of __________ gms of zinc per m² of steel strip.

View solution

Q. Chlorine acts as a bleaching agent only in the presence of

View solution

Q. Corona discharge is related to the operation of a/an

View solution

Q. Plastics as a material of construction suffer from the drawback of low

View solution

Q. 'Cryogenics' is concerned with the generation & use of low temperature in the range of

View solution

Q. The capacity of a spring to store energy is called the spring form co-efficient. Stiffness of a spring is measured by the

View solution

Q. Which of the following materials has the maximum shrinkage allowance ?

View solution

Q. Vibration upto 100 kilo hertz can be most accurately measured by a __________ type accelerometer.

View solution

Q. Yield strength of a material is determined by the __________ test.

View solution

Q. In fluid flow, and heat and mass transfer, one encounters (i) kinematic velocity (μ), (ii) molecular diffusivity (θ) and thermal diffusivity (α). The units of these quantities are.

View solution

Q. Window panes of aeroplanes are normally made of

View solution

Q. __________ flux is used for the extraction of metal from its self fluxing ores.

View solution

Q. Good design of the casing of a centrifugal pump aims at minimising the

View solution

Q. Which of the following is not a dielectric material ?

View solution

Q. Magnetic permeability of iron is increased by its

View solution

Q. The materials which fracture even at small strains are termed as brittle, while those materials which exhibit an appreciable deformation before failure are termed as

View solution

Q. Material of construction of foundary crucible is

View solution