Practice Test: Question Set - 15
1. To counteract the bad effects of strain hardening on a cold formed part, it must be
- (A) Tempered
- (B) Normalized
- (C) Annealed
- (D) Hardened
2. Which of the following metals reacts violently with water?
- (A) Mercury
- (B) Sodium
- (C) Calcium
- (D) Magnesium
3. The thermodynamic law, PVy = constant, is not followed by the
- (A) Free expansion of an ideal gas
- (B) Adiabatic expansion of steam in turbine
- (C) Adiabatic compression of air
- (D) Ideal compression of air
4. Steel is welded using the _________ flame.
- (A) Carburizing
- (B) Neutral
- (C) Oxidizing
- (D) All (a), (b) & (c)
5. The majority charge carriers in p-type silicon are
- (A) Free electrons
- (B) Ions
- (C) Conduction electrons
- (D) Holes
6. _________ is a special constituent of chlorophyll without which photosynthesis is not possible.
- (A) Calcium
- (B) Nitrogen
- (C) Phosphorous
- (D) Hydrogen
7. Quartz is a _________ material.
- (A) Diamagnetic
- (B) Ferromagnetic
- (C) Ferroelectric
- (D) Piezoelectric
8. The highest stress that a material can withstand for a specified length of time without excessive deformation is called the _________ strength.
- (A) Creep
- (B) Endurance
- (C) Fatigue
- (D) None of these
9. Force between the molecules of the same substance is called _________ force.
- (A) Adhesive
- (B) Cohesive
- (C) Molecular
- (D) Vander Walls
10. Coating thickness in case of galvanizing of steel sheet generally corresponds to the deposition of _________ gms of zinc per m2 of steel strip.
- (A) 5-10
- (B) 1000-1500
- (C) 120-500
- (D) 1500-3000
11. Which of the following is the most suitable abrasive for grinding high tensile strength materials?
- (A) Silicon carbide
- (B) Corundum
- (C) Aluminium oxide
- (D) Boron carbide
12. Two wires of the same radius & material having length in the ratio of 1 : 2 are stretched by the same force. The strain produced in the two wires will be in the ratio of
- (A) 1 : 1
- (B) 1 : 2
- (C) 2 : 1
- (D) 1 : 4
13. The noble metals
- (A) Are exemplified by Na, K and Li
- (B) Do not resist corrosion very strongly
- (C) Are the lowermost in the electro-chemical series of metals
- (D) None of these
14. Lead is poured into the joint between two _________ pipes.
- (A) Mild steel
- (B) Concrete
- (C) Cast iron
- (D) Asbestos cement
15. Unit of surface tension in S.I. unit is
- (A) Watt/m
- (B) Joule/m2
- (C) Newton/m2
- (D) Joule/m
Next Tests:
Blogger Comment
Facebook Comment