Math Terms
問題一覧
1
Which of these contour characteristics is not true
Contours on the ground can cross another
2
In many parts of the world, the high waters reach their greatest height and the low waters at the least height, soon after the time of full and new moon, this tides are called
Spring tides
3
based on the expression on the technical resolution of the International Water Way Congress, about how many percent of tide is guaranteed safe for the ships?
98%
4
In the standard practice of measuring vertical or zenith angles, the following practices are of great importance
I. Be sure instrument is level
II. Sight with the vertical crosshair
III. Sight exactly on the target
IV. Sight direct and reverse
I, III and IV only
5
The overall track structure for a railroad typically consist of the following except one.
I. Subgrade
II. Ballast
III. Spikes
IV. Ties
V. Rails
VI. Rails fastening
III
6
It is the maximum number of vehicles, which have a reasonable expectation of passing over a given section of lane or roadway in one direction or in both direction during one hour under prevailing road and traffic conditions.
Road Capacity
7
Guide signs are generally________ in shape
Rectangular
8
Pavement markings shall only be applied and/or removed by
DPWH
9
As stated in DPWH Road Safety and Design Manual, which of the following statements are elements to consider when planning National Roads?
I. Limited frontage access
II. Development set well back from the highways
III. All access to premises provided via provincial roads
IV. Number of Intersections to be minimized
V. Suitable at grade channelized intersections for minor flows and other elements
VI. No roadside vendor
VII. Their primary function is movement and not access
I thru VI only
10
According to DPWH Road Safety Design Manual, which of these factors are needed to be considered in choosing a design speed?
function of the road, anticipated operating speed and speed limit, economics
11
The DPWH Road Safety Design Manual emphasizes that at least four(4) different criteria are used for the establishment of sag vertical curve, these are:
headlights sight distance, passenger comfort, drainage control and general appearance
12
the provision of safety sight distance depends on the characteristics of:
The driver, the vehicle and the road environment
13
Each type of sight distance consist of three elements. Choose the best answer as stated in the DPWH Road Safety Design Manual
Driver Eye Height, Object Height, Sight Distance
14
Signs that inform road users of traffic laws and regulations which, if disregarded, will constitute an offense
Regulatory Signs
15
Warn road users of condition on or adjacent to the road that may be unexpected or hazardous
Warning Signs
16
Device mounted on a fixed support ( permanent signs) or portable support ( temporary signs) whereby a specific message is conveyed by means of words or symbols placed
Traffic Signs
17
used to separate adjacent lanes of traffic moving in the same direction
Lane line
18
A navigable deep channel leading through a harbour or along a shoreline
Fairway
19
A natural submerged ridge, bank or bar that consists of, or is covered by, sand or other unconsolidated material, and rises from the bed of a body of water to near the surface
Shoal
20
A straight or narrow sea between two close landmasses
Channel
21
Signs that instruct road users to meet certain traffic rule requirements on road conditions.
Special instruction signs
22
Signs which warn or advise temporary hazardous conditions that could
endanger road users or the men and equipment engaged on roadworks
Roadwork signs
23
Signs which provide means of displaying essential traffic information on wide multi-lane roads, where some degree of lane use control is required or where side of road clearance is insufficient to accommodate a road side sign.
Overhead signs
24
Signs used to guide drivers through a change in horizontal alignment of the
road.
Chevron signs
25
The reaction time used for road safety design is:
2.5 s
26
The purpose of installing edges lines is generally based on the following
I. To discourage travel on road shoulders.
II.To make driving safer and more assured particularly at night and during inclement weather conditions.
IlI.To act as a guide past object which are close to the edge of the pavement and which constitute a hazard.
IV.To prevent parking at or near intersections.
All of the above
27
Minimum K value vertical curves should be selected on the basis of three controlling factors:
I. Sight distance is a requirement in all situations for driver safety.
II.Appearance is generally required in low fill and flat topography situations.
III.Riding comfort is a general requirement with specific need on approaches to a floodway where the length of depression needs to be minimized.
IV.Vertical alignment should fit into the natural terrain earthwork balances.
I, II and III only
28
The safety of an intersection can be improved by he provision of right and left auxilliary turning lanes.
Turning lanes also improve intersection capacity and traffic flow.They are particularly important the
volume of trafic making these moves is high or the through or oncoming traffic flows are high. Provision for turning lanes an generally be provided in the following ways
I. Shared turning and through lane
II. Flaring and tape
III. Separate lane for deceleration and storage
IV. Establishment of a trafic Island
I, II and III only
29
Standard sign shape for STOP sign
Octagon
30
Standard sign shape for GIVEWAY sign.
Equilateral triangle
31
Standard sign shape for regulatory signs
Circle
32
Standard sign shape for additional information.
Circle
33
Standard sign shape for warning signs.
Equilateral triangle
34
Standard sign shape for directional signs, roadwork signs, signs for special purposes, and supplementary plates for warning signs.
Rectangle
35
Standard sign shape for facility information signs, instruction-signs, guide signs and destinations of point of interest.
Rectangle
36
Standard sign shape for pedestrian and school crossing sign.
Pentagon
37
PERT meaning
Program Evaluation Review Technique
38
CPM meaning
Critical Path Method
39
The ES time for an activity leaving a particular node is the largest of the EF times for all activities entering the node
Earliest Start Time Rule
40
The LF time for an activity entering e particular node is the smallest of the LS times for all activities leaving that node
Latest Finish Time Rule
41
Is the amount of time an activity can be delayed without affecting the completion date for all overall project
Slack
42
Those with zero slack
Critical path activities
43
Ways of reducing project duration
Strategic analysis and Tactical approach
44
In this approach the analyst assumes that the current diagram is appropriate and works at reducing the time of certain activities on the critical path by devoting more resources to them
A tactical approach
45
(Denotes by a): the minimum time. Everything has to go perfectly to achieve this time
Optimistic time
46
(Denoted by m): the most likely time. The time required under normal circumstances
Most probable time
47
(Denoted by b): the maximum time. One version of Murphy's Law is that if something can go wrong, it will. Is the time required when Murphy's Law is in effect
Pessimistic time
48
Has a minimum and maximum value. Also capable of assuming a wide variety of shapes
Beta distribution
49
Has infinite range of values and which is always symmetrical about its most likely value
Normal distribution
50
In 1 bd.ft how many inches
144 in^3
51
Default thickness of a concrete spacer or minimum steel cover of concrete
20 mm
52
of all paths through the network, the critical path has the
Maximum expected time
53
Which of the following satisfy the requirements for estimating expected activity times in a PERT network?
I. Make use of three estimates
II. Puts the greatest weight on the most likely time estimate
III.Is motivated by beta distribution
AOTA
54
Which of the following is the calculation of the probability that the critical path will be completed by the time T?
I. Assumes that the activity times are statistically independent
II. Assumes that the total time of the critical path has approximately beta distribution
III. Requires knowledge of the standard deviation for all activities in the network
I only
55
The earliest start time (ES) for an activity leaving node C(in the AOA approach)
All of the above
56
The latest finish time (LF) for an activity entering node H(in the AOA approach)
Depends on the latest finish time for the project
57
The slack for activity G
equals LS for G - ES for G
58
Probability that it will function properly for at least a specified time under specified experimental conditions.
Reliability
59
Distance traveled per unit of time
Speed
60
Arithmetic mean of the speeds observed at some designated point along the roadway
Time mean speed
61
Harmonic mean of the speeds observed at some designated point along the roadway
Space mean speed
62
The rate at which vehicles pass a given point in a roadway given in terms of vehicles per unit of time
Traffic flow
63
measure of the number of vehicles occupying a length of roadway
Traffic density
64
The distance between successive vehicles moving in the same lane measured from head to head at any instance
Space headway
65
The time interval between the passage of successive vehicles moving in the same lane measured from head to head as they pass a point on the road
Time headway
66
Which of the following is/are correct?
I. if two sides of a triangle are congruent, the angles opposite these sides are congruent
II. if two angles of a triangle are congruent, the sides opposite these angles are congruent
III. An equilateral triangle is equiangular
IV. An equiangular triangle is equilateral
All of the above
67
Which of the following is true
I. All histograms are single peaked
II. All bell-shaoed curves are normal curves and symmetrical
III. All normal curves are bell shaped and symmetrical
III only
68
To operate an instrument well, a field engineer needs to understand it's construction. There are differences among a transit, an optical theodolite, and the new electronic theodolites or total stations; hut geometrically, they are all the same. All instruments are designed around the same fundamental relationships or principle lines
Which of the following are correct geometric relationship?
I. The vertical axis should be perpendicular to axis of the plate levels
II. The vertical crosshair should lie in a plane perpendicular to the horizontal axis
III. The line of sight should be perpendicular to the horizontal axis
IV. The horizontal axis should be perpendicular to the vertical axis
V. The axis of the telescope should be perpeyto the line of sight
I, II, III and IV only
69
What are the components of stopping sight distance
Reaction Distance and Braking Distance
70
Primary consideration in the design of geometric cross-section of, highways, runways and taxiways
Drainage
71
The maximum number of vehicles, passengers, pedestrians or the like, which can be accommodated by a given facility under a given level of service
Volume
72
This is commonly identified as a primary, secondary and working control on the job site?
Horizontal control
73
Waves which falk forward since the forward velocity of the crest particles exceeds the velocity of propagation of the wave length L is less than 7 times the wave height (L lesser than 7H)
Breaking waves
74
The ratio of the wave height to it's wave length is called
Steepness
75
What is the meaning of MLLW
Mean Lower Low Water
76
A type of thermoplastic lane marking designed to aid and provide motorist with visual, audio Ang motion warning on the road
Rumble strip
77
A body of water with navigable depth leading to a harbour is called
Fairway
78
The distance travelled by a vehicle during the reaction time of the driver.
Lag distance
79
The distance a vehicle will travel from the point when its brakes are fully applied to when it comes to a complete stop
Braking distance
80
The sum of the braking distance and the distance traversed during the brake reaction time
Stopping sight distance
81
The length of roadway visible to a driver. Complete passing opposite vehicles without colliding
Sight distance
82
When directly generated and affected by local winds, a wind wave system is called
Wind sea
83
A maximum wave height and wave period of the maximum wave height in wave train
Significant wave
84
A wave generated in deep water, when reaching shoaling waters, charges not only in it's height but also in it's length but the period will
Decrease
85
In the measure of congestion of highway capacity, what will happen as the density continues to increase
The point is reached at w/c speed declines noticeably
86
What is the process of proportioning the cement, water, aggregates and additives prior to mixing concrete called
Batching
87
Following one or more condition
Locus of points
問題一覧
1
Which of these contour characteristics is not true
Contours on the ground can cross another
2
In many parts of the world, the high waters reach their greatest height and the low waters at the least height, soon after the time of full and new moon, this tides are called
Spring tides
3
based on the expression on the technical resolution of the International Water Way Congress, about how many percent of tide is guaranteed safe for the ships?
98%
4
In the standard practice of measuring vertical or zenith angles, the following practices are of great importance
I. Be sure instrument is level
II. Sight with the vertical crosshair
III. Sight exactly on the target
IV. Sight direct and reverse
I, III and IV only
5
The overall track structure for a railroad typically consist of the following except one.
I. Subgrade
II. Ballast
III. Spikes
IV. Ties
V. Rails
VI. Rails fastening
III
6
It is the maximum number of vehicles, which have a reasonable expectation of passing over a given section of lane or roadway in one direction or in both direction during one hour under prevailing road and traffic conditions.
Road Capacity
7
Guide signs are generally________ in shape
Rectangular
8
Pavement markings shall only be applied and/or removed by
DPWH
9
As stated in DPWH Road Safety and Design Manual, which of the following statements are elements to consider when planning National Roads?
I. Limited frontage access
II. Development set well back from the highways
III. All access to premises provided via provincial roads
IV. Number of Intersections to be minimized
V. Suitable at grade channelized intersections for minor flows and other elements
VI. No roadside vendor
VII. Their primary function is movement and not access
I thru VI only
10
According to DPWH Road Safety Design Manual, which of these factors are needed to be considered in choosing a design speed?
function of the road, anticipated operating speed and speed limit, economics
11
The DPWH Road Safety Design Manual emphasizes that at least four(4) different criteria are used for the establishment of sag vertical curve, these are:
headlights sight distance, passenger comfort, drainage control and general appearance
12
the provision of safety sight distance depends on the characteristics of:
The driver, the vehicle and the road environment
13
Each type of sight distance consist of three elements. Choose the best answer as stated in the DPWH Road Safety Design Manual
Driver Eye Height, Object Height, Sight Distance
14
Signs that inform road users of traffic laws and regulations which, if disregarded, will constitute an offense
Regulatory Signs
15
Warn road users of condition on or adjacent to the road that may be unexpected or hazardous
Warning Signs
16
Device mounted on a fixed support ( permanent signs) or portable support ( temporary signs) whereby a specific message is conveyed by means of words or symbols placed
Traffic Signs
17
used to separate adjacent lanes of traffic moving in the same direction
Lane line
18
A navigable deep channel leading through a harbour or along a shoreline
Fairway
19
A natural submerged ridge, bank or bar that consists of, or is covered by, sand or other unconsolidated material, and rises from the bed of a body of water to near the surface
Shoal
20
A straight or narrow sea between two close landmasses
Channel
21
Signs that instruct road users to meet certain traffic rule requirements on road conditions.
Special instruction signs
22
Signs which warn or advise temporary hazardous conditions that could
endanger road users or the men and equipment engaged on roadworks
Roadwork signs
23
Signs which provide means of displaying essential traffic information on wide multi-lane roads, where some degree of lane use control is required or where side of road clearance is insufficient to accommodate a road side sign.
Overhead signs
24
Signs used to guide drivers through a change in horizontal alignment of the
road.
Chevron signs
25
The reaction time used for road safety design is:
2.5 s
26
The purpose of installing edges lines is generally based on the following
I. To discourage travel on road shoulders.
II.To make driving safer and more assured particularly at night and during inclement weather conditions.
IlI.To act as a guide past object which are close to the edge of the pavement and which constitute a hazard.
IV.To prevent parking at or near intersections.
All of the above
27
Minimum K value vertical curves should be selected on the basis of three controlling factors:
I. Sight distance is a requirement in all situations for driver safety.
II.Appearance is generally required in low fill and flat topography situations.
III.Riding comfort is a general requirement with specific need on approaches to a floodway where the length of depression needs to be minimized.
IV.Vertical alignment should fit into the natural terrain earthwork balances.
I, II and III only
28
The safety of an intersection can be improved by he provision of right and left auxilliary turning lanes.
Turning lanes also improve intersection capacity and traffic flow.They are particularly important the
volume of trafic making these moves is high or the through or oncoming traffic flows are high. Provision for turning lanes an generally be provided in the following ways
I. Shared turning and through lane
II. Flaring and tape
III. Separate lane for deceleration and storage
IV. Establishment of a trafic Island
I, II and III only
29
Standard sign shape for STOP sign
Octagon
30
Standard sign shape for GIVEWAY sign.
Equilateral triangle
31
Standard sign shape for regulatory signs
Circle
32
Standard sign shape for additional information.
Circle
33
Standard sign shape for warning signs.
Equilateral triangle
34
Standard sign shape for directional signs, roadwork signs, signs for special purposes, and supplementary plates for warning signs.
Rectangle
35
Standard sign shape for facility information signs, instruction-signs, guide signs and destinations of point of interest.
Rectangle
36
Standard sign shape for pedestrian and school crossing sign.
Pentagon
37
PERT meaning
Program Evaluation Review Technique
38
CPM meaning
Critical Path Method
39
The ES time for an activity leaving a particular node is the largest of the EF times for all activities entering the node
Earliest Start Time Rule
40
The LF time for an activity entering e particular node is the smallest of the LS times for all activities leaving that node
Latest Finish Time Rule
41
Is the amount of time an activity can be delayed without affecting the completion date for all overall project
Slack
42
Those with zero slack
Critical path activities
43
Ways of reducing project duration
Strategic analysis and Tactical approach
44
In this approach the analyst assumes that the current diagram is appropriate and works at reducing the time of certain activities on the critical path by devoting more resources to them
A tactical approach
45
(Denotes by a): the minimum time. Everything has to go perfectly to achieve this time
Optimistic time
46
(Denoted by m): the most likely time. The time required under normal circumstances
Most probable time
47
(Denoted by b): the maximum time. One version of Murphy's Law is that if something can go wrong, it will. Is the time required when Murphy's Law is in effect
Pessimistic time
48
Has a minimum and maximum value. Also capable of assuming a wide variety of shapes
Beta distribution
49
Has infinite range of values and which is always symmetrical about its most likely value
Normal distribution
50
In 1 bd.ft how many inches
144 in^3
51
Default thickness of a concrete spacer or minimum steel cover of concrete
20 mm
52
of all paths through the network, the critical path has the
Maximum expected time
53
Which of the following satisfy the requirements for estimating expected activity times in a PERT network?
I. Make use of three estimates
II. Puts the greatest weight on the most likely time estimate
III.Is motivated by beta distribution
AOTA
54
Which of the following is the calculation of the probability that the critical path will be completed by the time T?
I. Assumes that the activity times are statistically independent
II. Assumes that the total time of the critical path has approximately beta distribution
III. Requires knowledge of the standard deviation for all activities in the network
I only
55
The earliest start time (ES) for an activity leaving node C(in the AOA approach)
All of the above
56
The latest finish time (LF) for an activity entering node H(in the AOA approach)
Depends on the latest finish time for the project
57
The slack for activity G
equals LS for G - ES for G
58
Probability that it will function properly for at least a specified time under specified experimental conditions.
Reliability
59
Distance traveled per unit of time
Speed
60
Arithmetic mean of the speeds observed at some designated point along the roadway
Time mean speed
61
Harmonic mean of the speeds observed at some designated point along the roadway
Space mean speed
62
The rate at which vehicles pass a given point in a roadway given in terms of vehicles per unit of time
Traffic flow
63
measure of the number of vehicles occupying a length of roadway
Traffic density
64
The distance between successive vehicles moving in the same lane measured from head to head at any instance
Space headway
65
The time interval between the passage of successive vehicles moving in the same lane measured from head to head as they pass a point on the road
Time headway
66
Which of the following is/are correct?
I. if two sides of a triangle are congruent, the angles opposite these sides are congruent
II. if two angles of a triangle are congruent, the sides opposite these angles are congruent
III. An equilateral triangle is equiangular
IV. An equiangular triangle is equilateral
All of the above
67
Which of the following is true
I. All histograms are single peaked
II. All bell-shaoed curves are normal curves and symmetrical
III. All normal curves are bell shaped and symmetrical
III only
68
To operate an instrument well, a field engineer needs to understand it's construction. There are differences among a transit, an optical theodolite, and the new electronic theodolites or total stations; hut geometrically, they are all the same. All instruments are designed around the same fundamental relationships or principle lines
Which of the following are correct geometric relationship?
I. The vertical axis should be perpendicular to axis of the plate levels
II. The vertical crosshair should lie in a plane perpendicular to the horizontal axis
III. The line of sight should be perpendicular to the horizontal axis
IV. The horizontal axis should be perpendicular to the vertical axis
V. The axis of the telescope should be perpeyto the line of sight
I, II, III and IV only
69
What are the components of stopping sight distance
Reaction Distance and Braking Distance
70
Primary consideration in the design of geometric cross-section of, highways, runways and taxiways
Drainage
71
The maximum number of vehicles, passengers, pedestrians or the like, which can be accommodated by a given facility under a given level of service
Volume
72
This is commonly identified as a primary, secondary and working control on the job site?
Horizontal control
73
Waves which falk forward since the forward velocity of the crest particles exceeds the velocity of propagation of the wave length L is less than 7 times the wave height (L lesser than 7H)
Breaking waves
74
The ratio of the wave height to it's wave length is called
Steepness
75
What is the meaning of MLLW
Mean Lower Low Water
76
A type of thermoplastic lane marking designed to aid and provide motorist with visual, audio Ang motion warning on the road
Rumble strip
77
A body of water with navigable depth leading to a harbour is called
Fairway
78
The distance travelled by a vehicle during the reaction time of the driver.
Lag distance
79
The distance a vehicle will travel from the point when its brakes are fully applied to when it comes to a complete stop
Braking distance
80
The sum of the braking distance and the distance traversed during the brake reaction time
Stopping sight distance
81
The length of roadway visible to a driver. Complete passing opposite vehicles without colliding
Sight distance
82
When directly generated and affected by local winds, a wind wave system is called
Wind sea
83
A maximum wave height and wave period of the maximum wave height in wave train
Significant wave
84
A wave generated in deep water, when reaching shoaling waters, charges not only in it's height but also in it's length but the period will
Decrease
85
In the measure of congestion of highway capacity, what will happen as the density continues to increase
The point is reached at w/c speed declines noticeably
86
What is the process of proportioning the cement, water, aggregates and additives prior to mixing concrete called
Batching
87
Following one or more condition
Locus of points