Correct answer
D. Pitch and creosote oil
Explanation
The correct answer is Pitch and creosote oil.
Positioning controllers are used for ________?
________ resins are produced by the condensation polymerisation of formaldehyde with urea or melamine?
In practice, the compression ratio of compression-ignition (CI) engine ranges from ________?
Optimum reflux ratio in a continuous distillation column is determined by the________?
The rough value of diffusion co-efficient of water vapor into air at 25°C may be about ________ cm2/sec?
Coking time in beehive coke oven is about ________?