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# QUIZ:CIVIL ENGINEERING (09-06-2020)

Quiz: Civil Engineering
Exam: UKSSSC-JE
Topic: Transportation engineering

Each question carries 1 mark
Negative marking: 1/4 mark
Time: 10 Minutes

Q1. Enoscope is used to determine
(a) spot speed
(b) average speed
(c) travel time
(d) none of these

Q2. Webster’s method is used for:
(b) Marking centerline of the road
(c) Determine design traffic volume
(d) Determine optimum signal cycle

Q3. The distance travelled by a moving vehicle during perception and breaker action time is known as
(a) Sight distance
(b) Stopping distance
(c) Lag distance
(d) None of these

Q4. The most suitable traffic signal system for mixed traffic condition is
(a) simple progressive
(b) alternate
(c) simultaneous
(d) flexible progressive

Q5. The colour of the light used for visibility during fog is
(a) Red
(b) Yellow
(c) Greed
(d) White

Q6. The magnitude of tyre pressure controls the following:
(a) Total thickness of pavement
(b) Number of layers to be provided in pavement
(c) type of sub-base and base course
(d) Quality of material to be used in the upper layers of pavement

Q7. Whose theory is primarily applied for designing rigid pavements?
(a) Bossinessq
(b) Westergaard
(c) Skempton
(d) Mc Cormec

Q8. In rigid pavements, the contraction joints spacing is normally provided as-
(a) 2.5 m
(b) 3.5 m
(c) 4.5 m
(d) 5.5 m

Q9. The top of the ground on which the foundation of the road rests is called as
(b) sub-base course
(c) wearing course
(d) Base course

Q10. Water bound macadam roads are constructed with the following type of materials:
(a) Crushed stone aggregates
(b) Soil and Gravel mixture
(c) Disintegrated Rocks
(d) Moorum

SOLUTION
S1. Ans.(a)
Sol. Enoscope or mirror box method is used to determine spot speed.
S2. Ans.(d)
Sol. Webster’s method is used for determining optimum signal cycle length (C_O) and it is given by according to webster’s method–

▭(C_O=(1.5L+5)/(1-Y))
L = Total lost time in a cycle length
Y = sum of critical flow rate for all phasess

S3. Ans.(c)
Sol. Lag distance is the distance travelled by a moving vehicle during perception and breaker action time.
S4. Ans.(d)
Sol. The most suitable traffic signal system for mixed traffic condition is flexible progressive.
S5. Ans.(b)
Sol. yellow light is used for visibility during fog.
S6. Ans.(a)
Sol. The magnitude of tyre pressure controls the quality of material to be used in the upper layers of pavement.

S7. Ans.(b)
Sol. Westergaard theory is primarily applied for designing rigid pavements.

S8. Ans.(c)
Sol. Contraction joints are used to prevent the contraction in rigid pavements. The contraction joints spacing is normally provided as 4.5. m.

S9. Ans.(a )
Sol. The top of the ground on which the foundation of the road rests is called as soil-sub grade.

S10. Ans.(a)
Sol. water bound Macadam roads are constructed with crushed stone aggregates or stone dust.

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