Engineering Chemical Engineering MCQ Test - Set 05 - ObjectiveBooks

Engineering Chemical Engineering MCQ Test - Set 05

Practice Test: Question Set - 05

1. The material used for coating the welding electrode is termed as the
    (A) Flux
    (B) Slag
    (C) Protective layer
    (D) Binder

2. In an eutectic system, two elements are completely
    (A) Soluble in solid state
    (B) Insoluble in liquid state
    (C) Insoluble in both solid & liquid state
    (D) Soluble in liquid state

3. Identify the correct statement.
    (A) Sphlerite is zinc oxide
    (B) The first law of the thermodynamics is stated as δE = δQ - δW
    (C) Lead can be produced in a blast furnace
    (D) T. ferrooxidans is a fungus that can be used for leaching chalcopyrite

4. Hot extrusion process is not used for making
    (A) Cast iron pipe for domestic water supply
    (B) Aluminium curtain rods
    (C) Stainless steel tubes used in furnitures
    (D) Any of these

5. _________ remains constant during the adiabatic cooling of moist air.
    (A) Wet bulb temperature
    (B) Dry bulb temperature
    (C) Relative humidity
    (D) Specific humidity

6. Basicity [%Cao + %MgO + %SiO2) of the slag in Indian blast furnace is in the range of
    (A) 0.7-1.0
    (B) 1.1-1.4
    (C) 1.5 - 1.8
    (D) 2.0 - 2.5

7. Dryness factor of steam is defined as the ratio of the mass of vapor in the mixture to the mass of the mixture. Dryness factor of steam is measured by a __________ calorimeter.
    (A) Bomb
    (B) Throttling
    (C) Junker's
    (D) Boy's

8. The most commonly used moderator in nuclear power plants is
    (A) Graphite
    (B) Light water
    (C) Heavy water
    (D) Beryllium

9. The dew point of moist air becomes __________ with decrease in its relative humidity.
    (A) Less than the wet bulb temperature
    (B) More than the wet bulb temperature
    (C) More than the dry bulb temperature
    (D) Equal to wet bulb temperature

10. Yield strength of a material is determined by the __________ test.
    (A) Creep
    (B) Tension
    (C) Compression
    (D) Endurance

11. Thermistors are used in __________ devices.
    (A) Voltage measuring
    (B) Temperature measuring
    (C) Temperature compensating
    (D) Both (b) & (c)

12. An ideal material for making cooking vessels should have
    (A) High heat capacity
    (B) Low heat capacity
    (C) High thermal conductivity
    (D) Both (b) and (c)

13. Which of the following is an example of stress corrosion?
    (A) Season cracking of brass
    (B) Caustic embrittlement of steel
    (C) Both (a) & (b)
    (D) Neither (a) nor (b)

14. Annealing of cast iron
    (A) Softens it to facilitate machining
    (B) Decreases the free carbon
    (C) Increases the strength
    (D) None of these

15. Secondary hardening in steels arises out of the
    (A) Precipitation of fine alloy carbides at high temperatures
    (B) Refinement of ferrite grain size by working
    (C) Decomposition of retained austenite upon heat treatment
    (D) Precipitation of complex inter-metallic upon heat treatment

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