(I. Hydrology (10%) EASY

Question 1

1. Area which contributes runoff or drains water into the reservoir (PAES 609:2016).

A. River basin
B. Runoff reservoir
C. Watershed
D. Drainage divide

Answer 1

Answer: C

Question 2

2. A thermometer that has a constriction above the bulb that permits the mercury to rise in the
   capillary tube but does not allow it to descend the capillary tube unless the thermometer is
   reset (PAGASA, 2022).

A. Minimum thermometer
B. Maximum thermometer
C. Air thermometer
D. Constrithermometer

Answer 2

Answer: B

Question 3

3. The science that encompasses the occurrence, distribution, movement and properties of the
   waters of the earth and their relationship with the environment (USGS, 2022).

A. Meteorology
B. Hydrometeorology
C. Hydrology
D. Limnology

Answer 3

Answer: C

Question 4

4. The study of the biological, chemical, and physical features of lakes and other bodies of fresh water (Oxford Languages, 2022).

A. Meteorology
B. Hydrology
C. Hydrometeorology
D. Limnology

Answer 4

Answer: D

Question 5

A branch of meteorology and hydrology that studies the transfer of water and energy between the land surface and the lower atmosphere (Wikipedia, 2022).
A. Meteorology
B. Hydrometeorology
C. Hydrology
D. Limnology

Answer 5

Answer: B

Question 6

6. Heavy rainfall or rain that accumulates at a rate of 3 tenths of an inch (0.3 inch or about 7.5
   mm) , or more, per hour (US National Weather Service, 2022).

A. Storm
B. Typhoon
C. Torrential rain
D. Heavy rain

Answer 6

Answer: C

Question 7

7. Dominant form of precipitation in the Philippines.

A. Flood
B. Rainfall
C. Runoff
D. Evaporation

Answer 7

Answer: B

Question 8

8. Kind of thermometer with pin inside its tube which does not go with the expanding liquid when temperature increases.

A. Maximum thermometer
B. Minimum thermometer
C. Air thermometer
D. Soil thermometer

Answer 8

Answer: B

Question 9

9. Method of areal rainfall determination done by computing the weighted average.

A. Averaging method
B. Polygon Method
C. Arithmetic method
D. Isohyetal method

Answer 9

Answer: C

Question 10

10. An instrument to measure depth of rainfall.

A. Rainfall dip stick
B. Rain gage
C. Bucket
D. Rainfall meter

Answer 10

Answer: B

Question 11

11. Part of rainfall which runs off the soil as surface or subsurface flow.

A. Flood
B. Runoff
C. Percolation
D. Infiltration

Answer 11

Answer: B

Question 12

12. Ratio of runoff over rainfall.

A. Runoff ratio
B. Runoff/rainfall ratio
C. Rainfall ratio
D. Runoff coefficient

Answer 12

Answer: D

Question 13

13. The part of rainfall that is stored in the root zone and can be used by the plants (FAO, 2022).
    This excludes rainfall that does not reach the soil and percolation below the root zone. For
    grassed soil surface, it is estimated that this rainfall is greater than 0.5 mm/day.

A. Atmospheric rainfall
B. Effective rainfall
C. Precipitation D.
Torrential rainfall

Answer 13

Answer: B

Question 14

14. The inverse of the probability of exceedance of a certain hydrologic event.

A. Hydro probability
B. Probability of inceedance
C. Return period
D. Event probability

Answer 14

Answer: C

Question 15

15. Airmass lifting process which is mountain-facilitated.

A. Natural
B. Convective
C. Mountain lifting
D. Orographic

Answer 15

Answer: D

Question 16

16. Airmass lifting process facilitated by sunlight or heating.

A. Natural
B. Convective
C. Mountain lifting
D. Orographic

Answer 16

Answer: B

Question 17

17. Indicates to what depth liquid precipitation would cover a horizontal surface in an
    observation period if nothing could drain, evaporate or percolate from this surface
    (Graf-Water, 2022).

A. Precipitation
B. Precipitation depth
C. Rainfall depth
D. Water depth

Answer 17

Answer: B