Best Chemical Engineering Multiple Choice Questions - Set 06 - ObjectiveBooks

Best Chemical Engineering Multiple Choice Questions - Set 06

Practice Test: Question Set - 06

1. _________ joint is mostly used for joining pipes carrying water at low pressure.
    (A) Nipple
    (B) Socket
    (C) Union
    (D) Bell and spigot

2. Pressure exerted by a liquid depends upon its
    (A) Surface tension
    (B) Density
    (C) Viscosity
    (D) Buoyancy

3. Silicon percentage in the silicon steel used for electrical appliances/equipments is
    (A) 0.3-0.4
    (B) 12-14
    (C) 3-4
    (D) 20-25

4. Brinell Hardness Number (BHN) for talc is approximately in the range of
    (A) 1-5
    (B) 20-30
    (C) 100-150
    (D) 200-250

5. Catalyst used in the 'catalytic converter' employed in automobile exhaust line for complete combustion/oxidation of carbon monoxide, nitrogen oxides and hydrocarbons is
    (A) Alumina
    (B) Platinum
    (C) Vanadium pentoxide
    (D) Iron oxide

6. Vibration upto 100 kilo hertz can be most accurately measured by a _________ type accelerometer.
    (A) Preloaded spring
    (B) Piezoelectric
    (C) Bonded strain gauge
    (D) None of these

7. Dowtherm is a
    (A) High temperature heating medium (a petroleum product)
    (B) Product of coal tar distillation
    (C) Very heat sensitive material
    (D) None of these

8. Pick out the wrong statement.
    (A) Weldability of high carbon steel is poorer compared to low carbon steel
    (B) Invar is a magnetic alloy
    (C) Magnetic permeability of the diamagnetic material is less than one
    (D) Martenistic transformation never goes to completion (i.e., 100%) at room temperature

9. _________ test can be termed as the semi-destructive test.
    (A) Impact
    (B) Torsion
    (C) Hardness
    (D) Charpy

10. Which of the following is not a ferromagnetic material?
    (A) Nickel
    (B) Cobalt
    (C) Aluminium
    (D) Iron

11. Brass parts with high residual tensile stress at the surface are susceptible to season cracking (i.e. spontaneous cracking occurring on exposure to atmospheric corrosion), if its zinc percentage is more than
    (A) 5
    (B) 10
    (C) 20
    (D) 35

12. Which of the following is normally not found in both the S.I. (petrol) & C.I. (diesel) engines?
    (A) Air filter
    (B) Fuel injector
    (C) Exhaust silencer
    (D) Battery

13. Addition of _________ to steel does not help in improving its machinability.
    (A) Sulphur
    (B) Silicon
    (C) Lead
    (D) Phosphorous

14. Silicon crystal can be converted to p-type semi-conductor by doping with
    (A) Phosphorous
    (B) Nitrogen
    (C) Carbon
    (D) Boron

15. A gas which is collected over water becomes moistened due to water vapor, exerts its own partial pressure at the gas temperature, which is termed as its
    (A) Aqueous tension
    (B) Saturated humidity
    (C) Vapor pressure
    (D) Absolute humidity

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