Practice Test: Question Set - 35
1. Which of the following alloying elements is present in maximum percentage in high speed steel?
- (A) Molybdenum
- (B) Chromium
- (C) Tungsten
- (D) Vanadium
2. Strain hardening effect in a metal subjected to cold working is due to the __________ mechanism.
- (A) Fracture
- (B) Dislocation
- (C) Slip
- (D) Twinning
3. The main constituent of bones is
- (A) CaF2
- (B) Ca3(PO4)2
- (C) CaCO3
- (D) CaCl2
4. 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 vapor 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
5. When an isolated thermodynamic system executes a process,
- (A) Work is done
- (B) Heat transfer takes place
- (C) Mass flow occurs across the boundary of the system
- (D) No chemical reaction takes place within the system
6. Temperature attained in soldering of metals is about __________ °C.
- (A) 150-300
- (B) 400-500
- (C) 650-800
- (D) 1000-1100
7. A material is capable of resisting softening at high temperature, because of its property termed as
- (A) Hot temper
- (B) Hot hardness
- (C) Fatigue
- (D) Creep
8. Which of the following are considered applications of ultrasonic testing?
- (A) Determination of elastic constant
- (B) Detection of defects in metal
- (C) Measurement of material thickness
- (D) None of the above
9. Which of the following heat treatment processes is usually applied to castings?
- (A) Tempering
- (B) Annealing
- (C) Normalizing
- (D) Carburizing
10. Pick out the wrong statement.
- (A) Complete unity of command exists in a line organization
- (B) Line organization is net suitable for expansion
and growth of an industry
- (C) In line and staff organization, "line" executes and
"staff directs
- (D) None of these
11. Atomic __________ of an element is a whole number.
- (A) Weight
- (B) Number
- (C) Volume
- (D) Radius
12. Most important property of steels for use in automobile bodies is the
- (A) Formability
- (B) Yield strength
- (C) Toughness
- (D) Resilience
13. Strain hardening effect in metals subjected to cold working is due to the __________ mechanism.
- (A) Slip
- (B) Fracture
- (C) Winning
- (D) Dislocation
14. Preheating before welding is done to
- (A) Make the plate softer
- (B) Burn oil & grease sticking to plate surfaces
- (C) Avoid plate distortion
- (D) Prevent cold cracks
15. Hardening of steel is not possible, unless it is heated __________ critical point.
- (A) Above the highest
- (B) Above the lowest
- (C) Between the first & second
- (D) Between the second & third
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