GATE, Engineering Services, TRP and other competitive Exams Questions with Answers: Answers are given in BOLD letters.
1. The total area under the stress-strain curve of a mild steel specimen tested upto failure under tension is a measure of its [Asked in GATE 2002 Examination]
(a) breaking strength (b) toughness (c) hardness (d) stiffness
2. The phenomenon of progressive extension of the material (ie) strain increasing with time at a constant load is termed as (a) yielding (b) creeping (c) strain hardening (d) enduring [Engineering Services Exam 2007]
3. A cylindrical rod of length l and diameter d is rigidly fixed at its upper end and hangs vertically. The elongation produced in the rod due to its self weight W is,
(a) Wl/AE (b) Wl/2AE (c) 2AE/Wl (d) 3Wl/2AE [Engineering Services Exam 2007]
4. A bar of length L tapers uniformly from diameter 1.1 D at one end to 0.9 D at the other end. The elongation due to axial pull is computed by taking the mean diameter D. Which is the approximate error in computed elongation? [Engineering Services Exam 2004]
(a) 10% (b) 5% (c) 1% (d) 0.5%
5. A 200 x 100 x 50 mm steel block is subjected to a hydrostatic pressure of 15 MPa. The young's modulus and Poisson's ratio of the material are 200 GPa and 0.3 respectively. The change in volume of the block in mm^3 is
(a) 85 (b) 90 (c) 100 (d) 110 [Gate-2007]
6. Malleability is the property by which a metal or an alloy can be plastically deformed by applying
(a) tensile stress (b) bending stress (c) shear stress (d) compressive stress [Engineering Services Exam 2008]
7. Which of the following cast irons consists of carbon in rosette form (a) white cast iron (b) grey cast iron (c) malleable cast iron (d) nodular cast iron [Engineering Services Exam 2009]
8. Killed steels (a) have minimum impurity level (b) have almost zero percentage of phosphorous and sulfur (c) are produced by LD process (d) are free from oxygen [Engineering Services Exam 1996]
9. In low carbon steels, the presence of small quantities of sulphur improves (a) weldability (b) formability (c) machinability (d) hardenability [Engineering Services Exam 1995]
10. If a particular Fe-C ally contains less than 0.8% carbon, it is called (a) high speed steel (b) hypo-eutectoid steel (c) hyper-eutectoid steel (d) cast iron [GATE 2007]
1. The total area under the stress-strain curve of a mild steel specimen tested upto failure under tension is a measure of its [Asked in GATE 2002 Examination]
(a) breaking strength (b) toughness (c) hardness (d) stiffness
2. The phenomenon of progressive extension of the material (ie) strain increasing with time at a constant load is termed as (a) yielding (b) creeping (c) strain hardening (d) enduring [Engineering Services Exam 2007]
3. A cylindrical rod of length l and diameter d is rigidly fixed at its upper end and hangs vertically. The elongation produced in the rod due to its self weight W is,
(a) Wl/AE (b) Wl/2AE (c) 2AE/Wl (d) 3Wl/2AE [Engineering Services Exam 2007]
4. A bar of length L tapers uniformly from diameter 1.1 D at one end to 0.9 D at the other end. The elongation due to axial pull is computed by taking the mean diameter D. Which is the approximate error in computed elongation? [Engineering Services Exam 2004]
(a) 10% (b) 5% (c) 1% (d) 0.5%
5. A 200 x 100 x 50 mm steel block is subjected to a hydrostatic pressure of 15 MPa. The young's modulus and Poisson's ratio of the material are 200 GPa and 0.3 respectively. The change in volume of the block in mm^3 is
(a) 85 (b) 90 (c) 100 (d) 110 [Gate-2007]
6. Malleability is the property by which a metal or an alloy can be plastically deformed by applying
(a) tensile stress (b) bending stress (c) shear stress (d) compressive stress [Engineering Services Exam 2008]
7. Which of the following cast irons consists of carbon in rosette form (a) white cast iron (b) grey cast iron (c) malleable cast iron (d) nodular cast iron [Engineering Services Exam 2009]
8. Killed steels (a) have minimum impurity level (b) have almost zero percentage of phosphorous and sulfur (c) are produced by LD process (d) are free from oxygen [Engineering Services Exam 1996]
9. In low carbon steels, the presence of small quantities of sulphur improves (a) weldability (b) formability (c) machinability (d) hardenability [Engineering Services Exam 1995]
10. If a particular Fe-C ally contains less than 0.8% carbon, it is called (a) high speed steel (b) hypo-eutectoid steel (c) hyper-eutectoid steel (d) cast iron [GATE 2007]
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