Question 4 of 20 :
select the best answer for the question.
4. if lift and duration remain constant and the lobe center angle decreases,
@ a. effective lift increases.
o b. valve overlap decreases.
o c. effective duration increases
o d. valve overlap increases.
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Awall of 0.5m thickness is to be constructed from a material which has average thermal conductivity of 1.4 w/mk. the wall is to be insulated with a material having an average thermal conductivity of 0.35 w/mk so that heat loss per square meter shall not exceed 1450 w. assume inner wall surface temperature of 1200°c and outer surface temperature of the insulation to be 15°c. calculate the thickness of insulation required.