Engineering Questions with Answers - Multiple Choice Questions
Mechanical Operations MCQ’s – Comparison of Pressure and Vacuum Filter
1 - Question
What does the following represents?
Y = 1- e-ct
a) Yielding
b) Fraction of samples
c) Mixing form
d) Can’t be specified
View Answer
Answer: b
Explanation: If Y is the fraction of the samples containing the two materials in approximately the proportion in the whole mix.
2 - Question
What is the speed of an impact wheel?
a) 1750 rpm
b) 3500 rpm
c) 1750 or 3500 rpm
d) Can’t be predicted
View Answer
Answer: c
Explanation: These disc turn at 1750 rpm for easy materials and 3500 rpm for materials that are hard to mix.
3 - Question
For a completely random mixture, the following equation gives ________
a) Mean deviation
b) Mean path
c) Standard path
d) Standard deviation
View Answer
Answer: d
Explanation: This equation implies for any given size of spot sample there is a theoretical standard deviation for a completely random mixture.
4 - Question
What does the below equation represent?
a) Rate of increase
b) Rate of mixing
c) Rate of decrease
d) Rate constant
View Answer
Answer: b
Explanation: It is found that for short mixing times, the rate of change if Is is a measure of how far mixing proceed towards equilibrium.
5 - Question
Fine powders that have flow characteristics, when agitated tend to ________
a) Settle
b) Float
c) Sink
d) Absorb
View Answer
Answer: a
Explanation: Fine powders, that have flow characteristics similar to a liquid when agitated, tend to settle to a very difficult flow condition when settled.
6 - Question
Bulk solids can be stored either _________
a) Loose
b) Stacked
c) Loose or Stacked
d) Not specific orientation
View Answer
Answer: c
Explanation: Bulk solids can be stored either loose or contained. Loose storage is mainly held in stockpiles, but since stockpiles are rather infrequent in Chemical Engineering.
7 - Question
Any bulk solid is made up of _________
a) Two
b) Three
c) Two or more
d) Three or more
View Answer
Answer: c
Explanation: Any bulk solid is made up of two or more phases, the most prominent of which is the disperse solids phase, the other phases are the interstitial fluid.
8 - Question
The elongation factor is given as ________
a) a/b
b) b/a
c) 2a/b
d) 2b/a
View Answer
Answer: a
Explanation: If we assume that a and b are the sides of this smallest rectangle, A is the actual projected area then, the elongation factor is a/b.
9 - Question
The bulkiness is given as
a) b/a
b) A/a.b
c) b/A.a
d) A/a
View Answer
Answer: b
Explanation: A is the actual projected area of the inscribed profile and U is its actual perimeter, than the bulkiness is given as A/a.b.
10 - Question
If the fluid passes upwards, then pressure drop is _________
a) Increased
b) Degrades
c) Same
d) Can’t be specified
View Answer
Answer: c
Explanation: If the fluid passes upwards through the bed, the pressure drop will be same as for downward flow at low rates.