Rajasthan PSC Farm Machinery Testing, Evaluation & Standards: practice questions

Question 1 · medium

A state research station has built the first working unit of a new self-propelled paddy transplanter and wants to know whether the design is sound enough to be taken to production. The appropriate test is a

1. prototype or initial test, with extended field running to expose design faults
2. batch test, drawing the unit at random from a production line for comparison
3. commercial test, so that the published report qualifies it for subsidy at once
4. rollover protective structure test, because every new machine must pass one first

Question 2 · hard

Under a machinery subsidy scheme that pays only for tested models, a dealer submits a valid commercial test report for a tractor model. The tractor being sold has a different engine and a different transmission from the one described in the report. The correct action is to

1. accept the report, because a commercial test report covers every variant sold under the same model name
2. accept the report if the dealer signs a declaration that the new engine gives equal or greater power
3. reject it for this variant, since a report covers only the specification tested
4. accept the report if the tractor passes a short drive on the dealer's yard in front of an officer

Question 3 · easy

A tractor's specific fuel consumption is measured at full load and at several part loads. The general pattern a test report shows is that SFC

1. is highest at full load and falls steadily as the load falls
2. is lowest near full load and rises steeply as the load falls
3. stays constant at every load because the governor holds speed
4. is lowest at no load because the engine does almost no work

Question 4 · easy

A tractor has separate left and right brake pedals. Before travelling on a public road, the pedals should be latched together because

1. the latch adds hydraulic assistance that can only work on the road
2. braking one side alone at speed can swing the tractor sideways
3. an unlatched pedal disengages the differential lock automatically
4. road rules require the parking brake to be built into the latch

Question 5 · easy

Noise at the operator's ear in tractor tests is reported in dB(A). The A-weighting is used because it

1. removes all engine noise so that only the transmission is measured
2. mimics how the ear hears low and very high frequencies less well
3. doubles the reading so that small differences become easier to see
4. measures vibration at the seat as well as sound at the ear position

Question 6 · easy

In rollover protective structure testing, the clearance zone or deflection-limiting volume (DLV) is

1. the space around a seated operator that the structure must not enter
2. the area of ground that the tractor sweeps when it turns at full lock
3. the volume of steel the structure must contain to pass the static test
4. the distance the tractor slides on its side before it comes to rest

Question 7 · easy

A tractor's ROPS was bent in an overturn but no one was hurt. The correct action is to

1. replace the structure with one certified for that tractor model
2. straighten it in a press and re-weld any cracks that have appeared
3. heat it and bend it back so that it is stronger than before the overturn
4. add a welded bracing tube so that the bent section is fully supported

Question 8 · easy

In a tractor drawbar test, the pull exerted by the tractor is measured by

1. a pressure gauge on the tractor's own hydraulic lift
2. the tachometer reading of the tractor engine speed
3. the fuel meter reading multiplied by travel speed
4. a load cell in the hitch connection to the load car

Question 9 · medium

In a field test of a sprayer, water-sensitive paper cards are placed in the crop canopy. They are used to assess

1. the flow rate of each nozzle on the spray boom in L/min
2. the chemical concentration of the tank mix in g/L
3. spray coverage and the droplet number per cm² on the target
4. the pump's delivery pressure at the regulator valve

Question 10 · easy

Before using any number from a tractor test report, the first things a reader should check are

1. the colour of the tractor, the dealer's location and the price paid at sale
2. the name of the operator who drove the test and the weather on the test day
3. the number of pages in the report and whether it is printed in colour
4. the code and edition, and the tested ballast, tyres and PTO speed