On This Page
This set of Engineering Materials Multiple Choice Questions & Answers (MCQs) focuses on Engineering Materials Set 4
Q1 | Solder is an alloy consisting of
- Copper and aluminium
- Lead and copper
- Tin and lead
- Tin, antimony and copper
- Tin and copper
Q2 | Which of the following material can be used for the filaments in incandescent lamps?
- Carbon
- Tungsten
- Tantalum
- Any of the above
- None of the above
Q3 | As per ISS : designation T 70 W 18 4V 1 is
- Stainless steel
- Low carbon steels
- High speed steel
- Soft
- Silicon steel
Q4 | Which of the following is not the characteristic property of aluminium?
- Good electrical conductivity
- Lightness
- Lest affinity for oxygen
- Resistance to corrosion
- High thermal conductivity
Q5 | In 18-4-1 high speed steel the maximum percentage of any constituent is
- Iron
- Chromium
- Tungsten
- Carbon
- Vanadium
Q6 | Wrought iron is
- Least resistant to corrosion
- Heat treated to change its properties
- Soft
- Highly resistant to corrosion
- Hard
Q7 | Machining properties of brass can be improved by the addition of
- Carbon
- Lead
- Zinc
- Chromium
- Aluminium Copper alloy
Q8 | Silicon steel is widely used in
- Automobile industry
- Electrical industry
- RCC work
- Channel and other section for structural fabrication
- All of the above
Q9 | The process by which steel is coated by a thin layer of phosphate is known as
- Anodising
- Phosphorizing
- Spheroidizing
- Parkerising
- Sheradising
Q10 | Creep is expressed in terms of
- cm/cm2/hr
- cm/cm
- kg/cm2
- cm/cm/hr
- kg/cm
Q11 | According to Hooke's law
- Stress is proportional to strain
- Stress/strain is constant
- Average stress is proportional to average strain
- Within elastic limits average stress is proportional to average strain
- None of the above
Q12 | Which one is different from the others in press work operations?
- Riveting
- Sizing
- Coining
- Flattening
- Punching
Q13 | The advantage of electroforming is
- Extreme dimensional accuracy can be held on surfaces with surface finish of 8 r.m.s. or even less
- Laminated metals can be produced
- Rate of production is very high
- (A) and (B) above
- (A) and (C) above
Q14 | The size of coarse grams in metals is
- > 0.0005 mm
- >1 mm
- > 0.05 mm
- > 0.005 mm
- > 0.5 mm
Q15 | A ductile fracture is characterized by
- Rapid rate for crack propagation
- Negligible deformation
- Fragmentation into more than two pieces
- Appreciable plastic deformation prior to propagation of crack
- None of the above
Q16 | Which of the following is not a rare and precious metal?
- Platinum
- Palladium
- Tantalum
- Lithium
- None of the above
Q17 | Which of the following is donor impurity for semi-conductors?
- Boron
- Callium
- Antimony
- Indium
- Aluminium
Q18 | A concrete wall generally
- Isentropic material
- Creates sound
- Transmits sound
- Reflects sound
- Absorbs sound
Q19 | The effect f rolling on steel is
- To elongate the inclusions in the direction of rolling giving the steel excellent properties
- Reduction in tensile strength
- Reduction in fatigue strength
- Reduction in hardness
- None of the above
Q20 | Fatigue failure occurs when a part is subjected to
- Tensile stress
- Compressive stress
- Torsion
- Fluctuating stress
- None of the above
Q21 | Heavy water is used in atomic power plants as
- Source of energy
- Moderator
- Lubricant
- Fuel
- Viscous damping fluid
Q22 | The surface hardness that can be obtained by nitriding is generally in the range
- 600 to 800 VPN
- Strength and hardness of steel is increased
- 400 to 600 VPN
- 1000 to 1100 VPN
- Below 400 VPN
Q23 | Residual magnetism is
- Magnetism left in a sample after a decade
- Magnetism left in a sample after one year
- Flux density present in a material after magnetising force is removed
- The magnetic force required to fully demagnetise a sample
- None of the above
Q24 | Every material obeys the Hooke's law within
- Breaking limit
- Elastic limit
- Plastic limit
- Limit of proportionality
- Yield limit
Q25 | In cast irons
- Impact strength is high
- With static loading the strength in tension is higher than that in compression
- With static loading the strength in tension is lower than that in compression
- (A) and (B) above
- (A) and (C) above