CPM Basic 1 PDF
CPM Basic 1 PDF
CPM Basic 1 PDF
Mechanics & Construction Materials and Management : Basic
Level
Represent whole test solution with correct and incorrect answers.
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Q.1 A stone having mass ‘m’ tied at the end of a string of length ‘L’ is whirled in a circle in vertical plane at a
constant speed. The tension in the string will be maximum when the stone is
a. at the bottom of the circle
b. at the top of the circle
c. half way down from the top
d. quarter way down from the top
Q.2 Which of the following statement is CORRECT in bar chart planning?
a. The inter dependence of the operation cannot be portrayed.
b. The progress of work can be measured.
c. The spare time of the activities can be determined.
d. The schedule can be updated.
Q.3 The strength of timber is maximum in which of the following direction?
a. Perpendicular to grains
b. Same in all directions
c. Parallel to grains
d. 45° to grains
Q.4 The main function of alumina in brick earth is
a. to impart plasticity.
b. to make the brick durable.
c. to prevent shrinkage.
d. to make the brick impermeable.
Q.5 A project has a duration of takes 25 days along the critical path and has a standard deviation of 5 days.
The probability of completing the project within 25 days will be
a. 0%
b. 50%
c. 75%
d. 100%
Q.6 If a spring scale indicates a tension ‘T ’ in the right hand cable of the pulley system as shown below, then
the mass of wooden block will be
[Neglect the mass of pulleys and ignore friction between the cable and pulley]
a. Zero
b.
c.
d.
Q.7 Consider the following statements regarding the curing of concrete.
I. Concrete needs more water for chemical reaction.
II. It is necessary to protect the water initially mixed in concrete from being lost during evaporation.
III. Penetration of surrounding water increases the strength of concrete.
Which of the above statement(s) is(are) CORRECT?
a. I, II and III
b. I and III
c. II only
d. III only
Attempt Incorrect Your Ans. a Correct Ans. c
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Q.8 The damp proof course (D.P.C.) of uniform thickness in a building having walls of different widths is
measured in
a. m4
b. m3
c. m2
d. m
Q.9 According to the Indian Standard specifications, accelerated cured concrete should be cured under a
minimum relative humidity of _____%.
Q.10 Plywood is made by bonding together the thin layers of wood in such a way that the angle between grains
of any layer to the grains of adjacent layers is _____ degree.
Q.11 A block weighing 981 N is resting on a horizontal surface. The coefficient of friction between the block and
the horizontal surface is 0.2. A vertical cable attached to the block provides partial support as shown. A
man can pull horizontally with a force of 100 N. If the man is just able to move the block to the right then the
tension in the cable is ____________ N.
Q.12 The network shown below has the estimated duration (in days) for each activity as marked on the network.
The latest finish time for activity H is ____________days.
Attempt Correct Correct Ans. 15
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Q.13 For perfectly elastic bodies, the value of coefficient of restitution is __________.
Q.14 The optimistic, most likely and pessimistic time estimates of an activity are 5, 10 and 21 days
respectively. The ratio of expected time to standard deviation is _____.
Q.15 A swimmer can swim 10 km in 2 hours when swimming along the flow of a river. While swimming against
the flow, she takes 5 hours for the same distance. Her speed in still water is ________ km/h.
Q.16 The normal duration and normal cost of an activity are 10 days and Rs 350 respectively. The cost slope is
Rs 75 per day. If the crash duration is 8 days, then the crash cost of the activity will be Rs____________.
I. Rapid hardening
II. More ultimate strength with less heat generation
III. Better resistance to chemical attack
Which of the above statement(s) is(are) CORRECT?
a. Only I
b. Only II
c. I and III
d. II and III
Q.18 The following diagram shows the duration of various activities (in days) for the CPM network analysis:
The critical path will be
a. 1 – 2 – 3 – 5 – 6
b. 1 – 2 – 3 – 4 – 5 – 6
c. 1 – 2 – 4 – 5 – 6
d. 1 – 2 – 4 – 3 – 5 – 6
Q.19 A beam ABCDEF, 7 m long is subjected to vertical forces and a moment as shown in the figure given
below. The magnitude of simplest resultant (in N) of all these forces and its distance (in m) from end A will
be
a. 150 and 4.2
b. 100 and 4.2
c. 150 and 2.8
d. 100 and 2.8
Q.20 Match ListI with ListII and select the correct answer using the codes given below the lists:
a. a
b. b
c. c
d. d
Q.21 Which of the following pairs in respect of ordinary portland cement are correctly matched?
I. Initial setting time ... 30 minutes
II. Final setting time ... 10 hours
III. Normal consistency ... 10%
Select the correct answer using the codes given below:
a. I, II and III
b. I and III
c. I and II
d. II and III
masses at an acceleration of 4 m/s2 . What is the magnitude of force ‘P ’ (in N) and the reaction between the
blocks (in N)?
[Take coefficient of kinetic friction between block A and floor equal to 0.15 and that between the block B
and floor as 0.25]
a. 124.91 and 64.52
b. 124.91 and 73.58
c. 173.96 and 64.52
d. 173.96 and 73.58
Q.23 Match ListI (Term) with ListII (Description) and select the correct answer using the codes given below the
lists:
a. a
b. b
c. c
d. d
Q.24 Consider the following statements regarding ‘AON’ diagram
I. Each activity is represented by a circle.
II. The successor of the activity is connected by a directed arrow.
III. The number of the activity and the amount of time required for its completion are inserted in the job
node.
IV. An AON graph contains a node for the start and a node for the finish of the project. Of these
statements:
a. I, II and III are correct
b. II, III and IV are correct
c. I, II, III and IV are correct
d. I, III and IV are correct
Q.25 A bob of pendulum forms an arc of a circle of radius 1.5 m. If the tension in the cord is 2.6 times the weight
of the bob at position of pendulum is shown below in the figure then the velocity of the bob in this position is
_____ m/s.
Q.26 PERT calculations yield a project length of 75 weeks with a variance of 9 weeks. Probability factor
corresponding to 95% probability is 1.65. The number of weeks required to complete the project with a
probability of 95% is _____
Q.27 Modular bricks are of nominal size 20 × 10 × 10 cm and 25% of the volume is lost in mortar between joints.
The number of modular bricks required per cubic meter of brickwork are ________. [Round off to nearest
integer]
Q.28
A beam AB, 2 m long, uniform in crosssection is held in equilibrium by the application of a force ‘P ’ as
shown below. If the self weight of beam AB is 100 kN then the magnitude of force ‘P ’ is _____ kN.
Q.29 A bar chart of four activities indicating their scheduled start and finish time in days and the resource
requirement per day are shown below. The ratio of maximum to the minimum resource needed on any of
the day will be _____.
Q.30 The crosssection of a strip footing is shown below :
The quantity of earth work in excavation per meter is ________ × 10–3 m3 .
Q.31 A triangle ABC with sides AB = 9 cm, BC = 7 cm, CA = 6 cm is shown in figure. The position of its centroid
on xaxis (i.e. distance from yaxis) is _____ cm.
Attempt Correct Correct Ans. 4.26 (4.2 4.4)
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Q.32 A network of seven activities is shown in the diagram given below. The respective activity durations (in
weeks) are shown beside the arrows. The sum of the total float in AB, the total float in CE and free float in
EF is _________ weeks.
Q.33 A mass of 35 kg is suspended from a weightless bar AB which is supported by a cable CB and a pin at A
as shown in figure. The resultant pin reaction at A on the bar AB is ____________N.