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:
