Chemical Engineering - Chemical Engineering Basics
Exercise :: Chemical Engineering Basics - Section 9
46.
Lead pencil contains
A.
graphite B.
lead sulphide C.
lead D.
both(b) & (c)
Answer: Option A
Explanation:
47.
Function of gear box is to
A.
reduce the speed. B.
obtain variable speed. C.
increase the speed. D.
produce high torque.
Answer: Option B
Explanation:
48.
Pearlite comprises of
A.
87% cementite & 13% Fe. B.
87% ferrite & 13% cementite. C.
93.33% ferrite & 6.67% C. D.
87% ferrite & 13% C.
Answer: Option B
Explanation:
49.
Which of the following if present in iron ore, enhances its value ?
A.
Alumina B.
Alkali oxide C.
Lime & Magnesia D.
None of these
Answer: Option C
Explanation:
50.
As per international norms, the maximum permissible value of noise level in the industrial environment is __________ decibels as measured at a distance of 1.5 metres from the source of noise.
Answer: Option B
Explanation: