In a PERT network, the activity durations are given as to (optimistic), tp (pess

CuriousTab

CuriousTab

Home Aptitude

Discussion

Home ‣ Civil Engineering ‣ UPSC Civil Service Exam Questions Comments

Question
In a PERT network, the activity durations are given as t_o (optimistic), t_p (pessimistic) and t_m (most likely time). What is the variance of is activity?
Options
A.
B.
C.
D. None of the above

Correct Answer

UPSC Civil Service Exam Questions problems

Search Results

2. Consider the following methods of preservation of timber :
1. Dipping
2. Brushing or spraying
3. Pressure impregnation
The correct sequence in decreasing order of the effectiveness of these methods of preservation is
Options
A. 1, 2, 3
B. 2, 1, 3
C. 3, 1, 2
D. 3, 2, 1

3. What is the use of a station pointer?
Options
A. For making soundings in water bodies
B. For plotting of soundings in harbour area
C. For marking sunken shipping hazards
D. For making tidal observations

6. Consider the following statements :
A : In masonry, bricks are joined together by cement mortar.
B : Cement mortar adheres more effectively to brick surface than any other material.
Options
A. both A and R are true and R is the correct explanation of A
B. both A and R are true but R is not the correct explanation of A
C. A is true but R is false
D. A is false but R is true

7. Consider the following statements :
Collision diagram is used to
1. study accident pattern
2. eliminate accidents
3. determine remedial measures
4. make statistical analysis of accidents
Of these statements :
Options
A. 1 and 2 are correct
B. 1 and 3 are correct
C. 3 and 4 are correct
D. 2 and 4 are correct

8. A bar of circular cross-section of diameter D is subjected to a torque T at B as shown in the figure given. What is the angle of twist at A?
Options
A. Same as that at B
B. Zero
C. Twice as that at B
D. Half as that at B

10. The following steps are involved in making a spigot and socket joint of cast iron pipes used in water supply systems :
1. Tarred gasket or hemp yarn in wrapped around the spigot.
2. The sipgot end is centered into the socket end of the preceding pipe.
3. A joining ring end is placed around the barrel and against the face of the socket.
4. The gasket or hemp yarn in caulked slightly.
5. Molten pig lead is poured and then caulked.
The correct sequence of these steps is
Options
A. 2, 1, 4, 3, 5
B. 2, 1, 3, 4, 5
C. 1, 2, 4, 5, 3
D. 1, 2, 3, 5, 4

Comments

More in Civil Engineering: