Practice Test: Question Set - 45
1. Methyl orange indicator turns
- (A) Orange yellow in alkaline medium
- (B) Orange yellow in acidic medium
- (C) Colorless in acidic medium
- (D) Colorless in basic medium
2. Limestone addition in the blast furnace is done to flux __________ present in the raw materials.
- (A) SiO2
- (B) Al2O3
- (C) MnO2
- (D) P
3. Metallic surveying tapes are made of __________ which has a low co-efficient of expansion & enough strength.
- (A) Invar
- (B) Hastelloy
- (C) Duralumin
- (D) Monel metal
4. Sand used to stop the green sand from sticking to the pattern is termed as the __________ sand.
- (A) Parting
- (B) Synthetic
- (C) Loam
- (D) Dry
5. Titanium is produced by __________ of Ti Cl4.
- (A) Electrolytic reduction
- (B) Calcium reduction
- (C) Magnesium reduction
- (D) Thermal dissociation
6. For efficient performance of a blast furnace, the extent of reduction of Wustite (FeO) should be
- (A) 100% indirect reduction
- (B) 100% direct reduction
- (C) 50-60% indirect reduction
- (D) 30-40% indirect reduction
7. Atomic __________ is a whole number for an element.
- (A) Number
- (B) Weight
- (C) Radius
- (D) None of these
8. Tip of the match stick contains a mixture of
- (A) K + S
- (B) K + S + K2Cr2O7
- (C) S + K2Cr2O7 + White P
- (D) None of these
9. Out of the following, the lowest packing of atoms exists in __________ crystal lattice structure.
- (A) Hexagonal close, packed (hcp)
- (B) Face centered cubic (fcc)
- (C) Body centered cubic (bcc)
- (D) Simple cubic
10. Internal energy of a gas obeying Van-Der-Waals equation of state, [p + (a/v2)] (V - b) = RT, depends upon its
- (A) Pressure & temperature
- (B) Pressure & specific volume
- (C) Temperature & specific volume
- (D) Temperature only
11. An abrupt and sudden fall in the reading of barometer is an indication of the
- (A) Storm
- (B) Rain
- (C) Clear weather
- (D) Cold wave
12. The concentration of (H+) ions is 4 x 10-5 in a solution. Then pH of the solution will be (Given log 4 = 0.6)
- (A) 4.4
- (B) 5.6
- (C) 8.4
- (D) 2.4
13. For the Stoke's law to be valid in the case of a falling sphere in a fluid, the
- (A) Reynolds number (based on sphere diameter) should be < 1
- (B) Flow around the sphere should be in turbulent region
- (C) Sphere must be metallic
- (D) Fluid density should be constant
14. The swift cup test evaluates the following property of a sheet metal.
- (A) Stretchability
- (B) Drawability
- (C) Bendability
- (D) None of these
15. Saturated steam at a pressure of 25 kg/cm2 is throttled to attain 5 kg/cm2. Then the outcoming steam will be
- (A) Wet
- (B) Saturated
- (C) Superheated
- (D) None of these
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