GENERAL DESIGN OF CANALS

Question 1

TRAPEZOIDAL IS THE MOST ACCEPTED SHAPE FOR EARTHEN CANALS

Answer 1

TRUE

Question 2

SIDE SLOPES OF 3:2 FOR SMALLER CANALS AND LATERALS AND 4:2 FOR LARGER CANALS IS GENERALLY ADEQUATE FOR MOST EARTH MATERIALS AND SHOULD BE CONSIDERED WHEN DETERMINING THE SIDE SLOPES OF CANALS

Answer 2

TRUE

Question 3

3.0 FPS FOR SMALLER CANALS UP TO 1.5 FPS FOR LARGER ARE THE RANGE OF PERMISSIBLE VELOCITIES CONSIDERED FOR SIZING A CANAL WATER SECTION

Answer 3

FALSE

Question 4

WHAT CONSIDERATIONS MUST BE MADE WHEN CANAL CONSTRUCTION IS TO UTILIZE CUT AND FILL METHODS

Answer 4

ALL OF THE ABOVE

Question 5

STEEL FLUMES ARE SELDOM USED TODAY DUE TO HIGH MAINTENANCE COSTS

Answer 5

TRUE

Question 6

ALONG UPHILL TERRAIN CONCRETE BENCH FLUMES ARE MOST COMMONLY USED

Answer 6

FALSE

Question 7

WHAT SHAPE OF FLUME GIVES THE MAXIMUM VELOCITY FOR A GIVEN AREA

Answer 7

ONE THAT HAS A BOTTOM WIDTH 2 TIMES THE DEPTH OF THE WATER

Question 8

ENCOUNTERED FALLING ROCK AND DEBRIS ARE IDEAL CONDITIONS TO MAKE PRECAST CONCRETE PRESSURE PIPE FOR FLUME SERVICE

Answer 8

TRUE

Question 9

BURIED PRECAST CONCRETE PIPE AND MONOLITHIC CONCRETE PIPE ARE CONSIDERED COMMON TYPES OF CONSTRUCTION FOR SIPHON SERVICE

Answer 9

TRUE

Question 10

WHY IS CONCRETE PIPE PREDOMINATELY USED FOR CANAL SIPHONS

Answer 10

ALL OF THE ABOVE

Question 11

MONOLITHIC CONSTRUCTION IS GENERALLY CONSIDERED FOR SIPHONS SMALLER THAN 96 INCHES IN DIAMETER

Answer 11

FALSE

Question 12

FACTORS THAT DICTATE CONSTRUCTION OF ELEVATED STEEL PIPE SIPHONS COULD BE WHERE COSTLY ROCK EXCAVATION IS ENCOUNTERED AND LIMITED SPACE FOR HANDLING RIVER FLOWS DURING CONSTRUCTION

Answer 12

TRUE

Question 13

WHAT ESSENTIAL DESIGN FEATURES IN ADDITION TO THE PIPE ITSELF MUST BE CONSIDERED FOR INVERTED SIPHONS

Answer 13

BOTH A AND B
INLET AND OUTLET TRANSITIONS
BLOWOFF STRUCTURES

Question 14

INLET AND OUTLET TRANSITIONS SERVE FOR THE PURPOSE OF MAXIMIZING HEAD LOSS AND EROSION DAMAGE

Answer 14

FALSE

Question 15

A PUMP TYPE GRAVITY TYPE AND PRESSURE TURNOUT TYPE ARE ALL CONSIDERED BLOWOFF STRUCTURES

Answer 15

TRUE

Question 16

WHEN FEASIBLE BLOWOFFS SHOULD BE LOCATED AT THE LOW POINTS OF SIPHON WHERE WATER IS DRAINED INTO NATURAL DRAINAGE CHANNELS

Answer 16

TRUE

Question 17

TO DISLODGE SEDIMENT AND DEBRIS THAT MAY BECOME PACKED IN THE DISCHARGE LINE IMMEDIATELY UPSTREAM OF THE BLOWOFF VLV IS THE PURPOSE OF THE HIGH VELOCITY JET UTILIZED IN SOME GRAVITY BLOWOFFS

Answer 17

TRUE

Question 18

TO CONVEY WATER OVER RELATIVELY STEEP SLOPES TO LOWER GRADES AND WATER SURFACES IN CANALS OR LATERALS IS THE PURPOSE OF CHUTE(DROP)

Answer 18

TRUE

Question 19

WHAT PURPOSE DO THE CONTROLLED NOTCH OR STOPLOGS SERVE IN THE INLET TRANSITIONS OF DROPS AND CHUTES

Answer 19

PREVENTS DRAWDOWN AT THE ENTRANCE THAT WOULD CAUSE EROSION OF CANAL BANK

Question 20

IF MAXIMUM VELOCITIES ARE MORE THAN 3.5 FPS AN OUTLET TRANSITION IS GENERALLY NOT NEEDED

Answer 20

FALSE

Question 21

BY PROVIDING A DEPRESSED SECTION OF PIPE AHEAD OF THE OUTLET TRANSITION IS HOW SUPERCRITICAL VELOCITIES ARE DISSIPATED IN PIPE DROPS

Answer 21

TRUE

Question 22

WATER HAMMER IS A REASON WHY OPEN TYPE STILLING POOLS OR IMPACT BASIN UTILIZED IN THE DESIGN OF OUTLET TRANSITIONS FOR PIPE CHUTES

Answer 22

TRUE

Question 23

WHAT IS THE PREFERRED SHAP OF A MONOLITHIC REINFORCED CONCRETE CHUTE

Answer 23

RECTANGLE

Question 24

BESIDES STOPLOGS SIPHONS ARE DEVICES USED TO CONTROL WATER LEVELS AT THE INLET TRANSITION OF MONOLITHIC REINFORCED CONCRETE DROPS AND CHUTES

Answer 24

FALSE

Question 25

THE ENERGY DISSIPATED BY THE BLOCKS CONSTRUCTED ALONG THE FLOOR OF THE CHUTE IS HOW THE CONVENTIONAL STILLING POOL IS UTILIZED IN THE BAFFLED DROP

Answer 25

FALSE

Question 26

CROSS DRAINAGE STRUCTURES SERVE THE PURPOSE TO PROTECT CANAL FROM DAMAGE DUE TO MOSS AND ALGAE

Answer 26

FALSE

Question 27

RELATIVE CAPACITY OF CANAL WITH RESPECT TO DRAINAGE FLOWS AND CANAL WATER SURFACE WITH RESPECT TO NATURAL GROUND SURFACE DICTATES THE NEED OF CROSS DRAINAGE

Answer 27

TRUE

Question 28

WHERE THE CANAL IS CARRIED ACROSS A NATURAL DRAINAGE CHANNEL UPON AN EMBANKMENT IS WHN CULVERTS ARE USED FOR CROSS DRAINAGE

Answer 28

TRUE

Question 29

FOR LARGE CANALS WHAT STORM FREQUENCY IS USED TO DEVELOP CULVERT SIZE

Answer 29

100 YEAR STORM FREQUENCY

Question 30

THE PURPOSE THAT PIPE COLLARS SERVE IN CULVERT CONSTRUCTION IS TO PREVENT WATER HAMMER IN THE DISCHARGE LINE

Answer 30

FALSE

Question 31

WHAT CONDITIONS DICTATE THE USE OF AN OVERCHUTE

Answer 31

ALL OF THE ABOVE

Question 32

WHEN THE AMOUNT OF DRAINAGE WATER IS LARGE BY COMPARISON TO THE CANAL IS WHAT MAKES DRAINAGE INLETS ACCEPTABLE

Answer 32

FALSE

Question 33

2 IMPORTANT FACTORS THAT DICTATE THE PLACEMENT OF A DRAINAGE INLET INTAKE ARE THE INTAKE MUST BE LOCATED BELOW THE MAXIMUM WATER SURFACE ELEVATION OF THE CANAL AND AT THE NATURAL GROUND LEVEL SURFACE

Answer 33

FALSE

Question 34

FLOW CONTROL AND FLOW MEASUREMENTS ARE CONSIDERED BASIC FUNCTIONS THAT A TURNOUT MUST PROVIDE

Answer 34

TRUE

Question 35

WHAT DEVICES ARE GENERALLY EMPLOYED FOR FLOW CONTROL AT TURNOUTS

Answer 35

-SLIDE GATES
-LIFT GATES
-RADIAL STEEL GATES

Question 36

PARSHALL FLUME AND CIPALLETTI WEIR ARE 2 MEASURING STRUCTURES PREDOMINATELY USED IN SMALL TURNOUTS

Answer 36

TRUE

Question 37

WASTE WAYS SERVE THE PURPOSE SO THAT THEY ARE UTILIZED TO DISPOSE OF UNWANTED EXCESS WATER FROM CANALS AND TO SAFELY EMPTY CANALS IN CASE OF CANAL BREAK OR OTHER EMERGENCIES

Answer 37

TRUE

Question 38

A SUDDEN DECREASE IN DISCHARGE WHEN THE SIPHON PRIMES IS DETRIMENTAL TO THE WASTE WAY CHANNEL AND WOULD BE CONSIDERED A DISADVANTAGE OF SIPHON SPILLWAYS

Answer 38

FALSE

Question 39

OVERFLOW SPILLWAY WITHOUT GATE CONTROL IS THE TYPE OF WASTE WAY CONSTRUCTION THAT IS GENERALLY PREFERRED

Answer 39

FALSE

Question 40

CHECKS SERVE THE PURPOSE TO CONTROL THE FLOW OF WATER IN A CANAL WHEN IT IS OPERATING AT PARTIAL CAPACITY

Answer 40

TRUE

Question 41

2 GENERAL TYPES OF CHECKS USED IN SMALL CANALS ARE THOSE UTILIZING FIXED CONCRETE CHECKS AND FLASHBOARDS FOR REGULATION

Answer 41

TRUE

Question 42

RADIAL GATE CHECKS OF THE CALIFORNIA AQUEDUCT ALWAYS EMPLOY OVERFLOW WEIRS

Answer 42

FALSE