Online Practice Test Basics in Chemical Engineering - Set 19 - ObjectiveBooks

Online Practice Test Basics in Chemical Engineering - Set 19

Practice Test: Question Set - 19

1. For a spontaneous natural process at constant temperature and pressure, the free energy of the system always
    (A) Increases
    (B) Decreases
    (C) Remain constant
    (D) Increases to a maximum before decreasing

2. The boiling & freezing points on a newly defined temperature scale in degree 'D' are 400°D & 100°D respectively. The temperature reading corresponding to 60°C on this new temperature scale will be equal to __________ °D.
    (A) 140
    (B) 180
    (C) 240
    (D) 280

3. To improve the machinability of steel, it is generally subjected to
    (A) Spheroidising
    (B) Tempering
    (C) Normalizing
    (D) Annealing

4. Difference at any instant between the value of the controlled variable and the set point is called the
    (A) Deviation
    (B) Derivative time
    (C) Error ratio
    (D) Differential gap

5. Dephosphorization of molten pig iron is favored by
    (A) Oxidizing and basic slag
    (B) Reducing and basic slag
    (C) High activity co-efficient of phosphorous in metal
    (D) Oxidizing and neutral slag

6. Cementite is in the lamellar form in the __________ phase of steel.
    (A) Martenistic
    (B) Bainitic
    (C) Pearlitic
    (D) Ferritic

7. Inertial forces are obtained, when the elastic forces are multiplied by __________ number.
    (A) Mach
    (B) Froude
    (C) Reynolds
    (D) Euler

8. Brazing is the joining of metals
    (A) Without melting the base metal
    (B) With a non-ferrous filler
    (C) Both (a) & (b)
    (D) Neither (a) nor (b)

9. Metal shots used in shot blasting are made of
    (A) Stellite
    (B) Steel
    (C) Bronze
    (D) Lead

10. Midrex process of sponge iron production uses reformed natural gas as the reducing agent, which uses iron ore in the form of
    (A) Lumps
    (B) Pellets
    (C) Briquettes
    (D) Sinter

11. Circular cross section machine parts which are symmetrical about the axis of rotation are made by hot
    (A) Piercing
    (B) Spinning
    (C) Drawing
    (D) Extrusion

12. Specific gravity of a metal, which weighs 5 kg in air and 4 kg when submerged in water, will be
    (A) 5
    (B) 1.25
    (C) 2.5
    (D) 3.75

13. A pycnometer is used for the measurement of
    (A) Flow rate of molten metal
    (B) Specific gravity of a liquid
    (C) Composition of alloys
    (D) Concentration of a solution

14. Which of the following low melting alloy containing bismuth and lead is used for electric fuse?
    (A) Wood's metal
    (B) Babbitt metal
    (C) Monel metal
    (D) Duralumin

15. Wavelength of radiation emitted by a body depends on the __________ of its surface.
    (A) Temperature
    (B) Area
    (C) Nature
    (D) All 'a', 'b' & 'c'

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