Civil Engineering
2019 · Paper 2
Take it one question at a time. Try an answer, then check your understanding.
Complete GATE CE 2019 Paper 2 overview, original pages and practice · Timed previous-paper practice
Questions 52–54 of 65. Imported answers require review unless explicitly marked reviewed.
Question 42
Open questionCENAT2 marksNeeds review
Consider the reactor shown in the figure. The flow rate through the reactor is
. The concentrations (in
) of a compound in the influent and effluent are
and
, respectively. The compound is degraded in the reactor following the first order reaction. The mixing condition of the reactor can be varied such that the reactor becomes either a completely mixed flow reactor (CMFR) or a plug-flow reactor (PFR). The length of the reactor can be adjusted in these two mixing conditions to
and
while keeping the cross-section of the reactor constant. Assuming steady state and for
, the value of
(round off to 2 decimal places) is __________ 
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Open questionCENAT2 marksNeeds review
A series of perpendicular offsets taken from a curved boundary wall to a straight survey line at an interval of 6
are 1.22, 1.67, 2.04, 2.34, 2.14, 1.87 and 1.15
. The area (in
, round off to 2 decimal places) bounded by the survey line, curved boundary wall, the first and the last offsets, determined using Simpson’s rule, is __________Log in to check the answer
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Open questionCENAT2 marksNeeds review
The uniform arrival and uniform service rates observed on an approach road to a signalized intersection are 20 and 50 vehicles/minute, respectively. For this signal, the red time is 30
, the effective green time is 30
, and the cycle length is 60
. Assuming that initially there are no vehicles in the queue, the average delay per vehicle using the approach road during a cycle length (in
, round off to 2 decimal places) is __________Log in to check the answer
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