Chemical Engineering MCQs [Set 1]

1. For dynamic strain measurement, the Wheatstone bridge used is of __________ type.
(A) Voltage sensitive null
(B) Voltage sensitive deflected
(C) Current sensitive deflected
(D) None of these

02. The only suitable method for hardening the low carbon steel is case hardening. Which of the following is a case hardening process?
(A) Cyaniding
(B) Sherardizing
(C) Spheroidising
(D) None of these

03. Filler material used in welding should have __________ as compared to the parent metal to be welded.
(A) Lower melting temperature
(B) Same melting temperature
(C) Same composition
(D) Both ‘b’ & ‘c’

04. The temperature at which the magnetic property of iron disappears (i.e., it becomes nonmagnetic) and its electrical conductivity & specific heat also changes, is called the ‘Curie point’ which is __________ °C.
(A) 768
(B) 908
(C) 1400
(D) 1539

05. About __________ ton of coke is required in a cupola to produce one ton of casting.
(A) 0.03
(B) 0.3
(C) 0.8
(D) 1.5

06. Referring to the periodic table of elements, it is found that with increasing atomic number. The atomic size in the same
(A) Period increases
(B) Period decreases
(C) Group increases
(D) Both ‘b’ & ‘c’

07. Satellites burn off during re-entry to earth’s atmosphere, because of the
(A) Combustion with air
(B) Gravitational pull by earth
(C) Friction with earth’s atmosphere
(D) Loss in weight of the satellite

08. Joining of thin foils is preferred to be done by
(A) Gamma rays
(B) X-rays
(C) Microwaves
(D) Gas welding

09. With increase in temperature, the electrical conductivity of semiconductors
(A) Increases
(B) Decreases
(C) Remain constant
(D) Either (A) or (B), depends on the type of semi-conductor

10. Laser welding is widely employed in the __________ industries.
(A) Electronic
(B) Structural
(C) Process
(D) Heavy

Updated: 27th June 2019 — 8:20 PM

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