Find real questions from previous competitive exam papers with answers and solutions.
Leave the keyword blank to browse saved questions for your selected exam, newest papers first. Add a keyword, year or topic to narrow the results.
Browse complete papersIn an external focusing telescope, the focal length is 25cm, and the distance from the objective to the vertical axis is 15cm. If an anallatic lens is used, what is the additive constant?
0.40m
0.10m
0.00m
0.25m
Correct answer
0.40m
An EDM instrument uses a modulation frequency of 20MHz. What is the maximum distance (unit length) it can measure WITHOUT ambiguity? (Assuming \( c = 3.8 \times 10^8 \) m/s)
15.0m
9.5m
30.0m
60.0m
Correct answer
15.0m
If the standard deviation of an angle is \( \pm 2'' \), what is the standard deviation of the sum of four such angles?
\( \pm 2'' \)
\( \pm 4'' \)
\( \pm 8'' \)
\( \pm 16'' \)
Correct answer
\( \pm 2'' \)
Which of the following is NOT considered a method of micro-irrigation?
Mist system
Trickle method
Surface flooding
Bubbler irrigation
Correct answer
Mist system
Which crop is most suitable for drip irrigation?
Rice
Wheat
Sugarcane
Jute
Correct answer
Rice
The primary purpose of guide banks in diversion head works is to:
Store water
Increase the discharge of the bank of the river
Train and confine the river flow
Measure flood level
Correct answer
Store water
If water discharge in a canal is \( 20m^3/s \) and duty is \( 1,000ha/cumec \), the area irrigated is:
10,000 ha
20,000 ha
30,000 ha
5,000 ha
Correct answer
10,000 ha
The hydraulic jump in stilling basins is mainly used to:
Increase velocity
Store water
Dissipate excess energy
Divert flow
Correct answer
Increase velocity
The time between the centre of mass of rainfall excess and the peak of hydrograph is known as _________.
Lag time
Time of concentration
Base period
Rising time
Correct answer
Lag time
If time of concentration of a catchment is 2 hours, the duration of rainfall for rational method should be:
Less than 2 hours
Equal to 2 hours
More than 2 hours
Zero
Correct answer
Less than 2 hours