Practice Test: Question Set - 33
1. Tempering of a material does not improve its
- (A) Machinability
- (B) Toughness
- (C) Internal stress level
- (D) Softness
2. Suitability of steel for its use in cable is judged by its strength in
- (A) Tension
- (B) Compression
- (C) Torsion
- (D) Shear
3. In connection with corrosion of metals, passivation is the process that
- (A) Intensifies deterioration
- (B) Changes the composition of the metal
- (C) Inhibits further deterioration
- (D) None of these
4. Change in volume of metals from absolute zero temperature to their melting points is
- (A) Almost same for all metals
- (B) Different for different metals
- (C) Less for low melting point metals
- (D) Less for high melting point metals
5. On oscilloscope screen for dynamic measurement, lissajous diagram is normally used to determine the __________ of the input signal.
- (A) Frequency
- (B) Amplitude
- (C) Damping
- (D) None of these
6. One ton of refrigeration is not equivalent to the heat removal rate of
- (A) 200 BTU/minute
- (B) 50 kcal/minute
- (C) 50 kJ/sec
- (D) 3.5 KW
7. Which of the following forces does not act on a fluid at rest?
- (A) Viscous force
- (B) Gravity force
- (C) Hydrostatic force
- (D) Surface tension force
8. Which of the following commonly used condenser tube materials has the lowest thermal conductivity?
- (A) Admiralty brass
- (B) Stainless steel
- (C) Aluminium brass
- (D) Titanium
9. Cold cracking in the heat affected zone of a high strength steel weld can take place because of the
- (A) Retained austenite
- (B) Martensite formation
- (C) Relatively high sulphur content in the base metal
- (D) Sufficient hydrogen present in the welding arc
10. Gage pressure within a spherical droplet of a fluid is 'p'. What will be gage pressure within a bubble of the same size & of the same fluid?
- (A) p
- (B) 2 p
- (C) 0.5 p
- (D) 0.25 p
11. Moist climate is the most favorable factor in the site selection far a
- (A) Steel plant
- (B) Textile factory
- (C) Petroleum refinery
- (D) Coke oven battery
12. In chemical dehumidification of air
- (A) Both specific humidity & dry bulb temperature increases
- (B) Both specific humidity & dry bulb temperature decreases
- (C) Specific humidity decreases & dry bulb temperature increases
- (D) Specific humidity increases & dry bulb temperature decreases
13. The most important function of a washer is to provide bearing area and washers are normally specified by their hole diameters. The diameter of washer as compared to the nut is
- (A) More
- (B) Less
- (C) Same
- (D) More but less than the diameter of bolt
14. Fire refining process is employed in case of
- (A) Tin
- (B) Copper
- (C) Zinc
- (D) Aluminium
15. Powder metallurgy is used to produce
- (A) High precision components with complex cavities and sharp features
- (B) Components of large size
- (C) Porosity free components
- (D) Components of such alloys whose constituents do not form alloys
readily
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