Related Questions

Slack is the calculated time span within which the event must occur:
A TRUE
B FALSE
C cannot be said
D All of the above
E None of the above
If TL is the largest allowable event occurrence time, total activity slack (s) is equal to
A Latest start time earliest start time
B Latest finish time earliest finish time (EFT)
C TLEFT
D All of the above
The tension on the slack side of the belt is __________ the tension on the tight side of the belt.
A Equal to
B Less than
C Greater than
D None of these
In a band and block brake, the ratio of tensions on tight side and slack side of the band is (where $$\mu $$ = Coefficient of friction between the blocks and the drum, $$\theta $$ = Semi-angle of each block subtending at the center of drum and n = Number of blocks)
A $$\frac{{{{\text{T}}_1}}}{{{{\text{T}}_2}}} = \mu \theta {\text{n}}$$
B $$\frac{{{{\text{T}}_1}}}{{{{\text{T}}_2}}} = {\left( {\frac{{1 - \mu \tan \theta }}{{1 + \mu \tan \theta }}} \right)^{\text{n}}}$$
C $$\frac{{{{\text{T}}_1}}}{{{{\text{T}}_2}}} = {\left( {\mu \theta } \right)^{\text{n}}}$$
D $$\frac{{{{\text{T}}_1}}}{{{{\text{T}}_2}}} = {\left( {\frac{{1 + \mu \tan \theta }}{{1 - \mu \tan \theta }}} \right)^{\text{n}}}$$
In a band and block brake, the ratio of tensions on the tight and slack sides of band is given by (where $$\mu $$ = Coefficient of friction between the blocks and the drum, $$\theta $$ = Semi-angle of each block subtending at the centre of drum and n = Number of blocks)
A $$\frac{{{{\text{T}}_1}}}{{{{\text{T}}_{\text{2}}}}} = \mu \theta \times {\text{n}}$$
B $$\frac{{{{\text{T}}_1}}}{{{{\text{T}}_2}}} = {\left( {\mu \theta } \right)^{\text{n}}}$$
C $$\frac{{{{\text{T}}_1}}}{{{{\text{T}}_2}}} = {\left( {\frac{{1 - \mu \tan \theta }}{{1 + \mu \tan \theta }}} \right)^{\text{n}}}$$
D $$\frac{{{{\text{T}}_1}}}{{{{\text{T}}_2}}} = {\left( {\frac{{1 + \mu \tan \theta }}{{1 - \mu \tan \theta }}} \right)^{\text{n}}}$$
Slack of various events on the critical path in PERT/CPM chart
A Increases continuously
B Decreases continuously
C Remain constant
D May increase or decrease depending on various factors
Activity slack or float of any event on a PERT/CPM chart is represented by
A Latest start time of succeeding event earliest finish time of preceding event activity time
B Latest start time of the event earliest start time of the event
C Latest finish time of event earliest finish time of the event
D Anyone of the above
When slack of an activity is negative
A It represents a situation where extra resources are available and the completion of project is not delayed
B It represents that a programme falls behind schedule and additional resources are required to complete the project in time
C The activity is critical and any delay in its performance will delay the completion of whole project
D All of the above
When slack of an activity is positive
A It represents a situation where extra resources are available and the completion of project is not delayed
B It represents that a programme falls behind schedule and additional resources are required to complete the project in time
C The activity is critical and any delay in its performance will delay the completion of whole project
D Any one of the above
Slack represents the difference between the
A Latest allowable time and the normal expected time
B Latest allowable time and the earliest expected time
C Proposed allowable time and the earliest expected time
D Normal allowable time and the latest expected time

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