Question:
Which ONE of the following CORRECTLY matches the metrology instruments and their respective most common applications?
Metrology Instrument Application P Sine bar 1 Surface roughness of milled planar surface Q Profilometer 2 Planar surface inclination of a part R Vernier calliper 3 Checking shaft diameter tolerance without direct measurement S Ring GO gauge 4 Length of any side of a cuboid
Which ONE of the following CORRECTLY matches the metrology instruments and their respective most common applications?
| Metrology Instrument | Application | ||
|---|---|---|---|
| P | Sine bar | 1 | Surface roughness of milled planar surface |
| Q | Profilometer | 2 | Planar surface inclination of a part |
| R | Vernier calliper | 3 | Checking shaft diameter tolerance without direct measurement |
| S | Ring GO gauge | 4 | Length of any side of a cuboid |
Show Hint
Match each tool to its single most common shop-floor job: angle, roughness, length, or go/no-go check.
Updated On: Aug 5, 2026
- P-2; Q-1; R-4; S-3
- P-4; Q-3; R-2; S-1
- P-4; Q-1; R-2; S-3
- P-2; Q-1; R-3; S-4
Show Solution
Verified By Collegedunia
The Correct Option is A
Solution and Explanation
Step 1: Understanding the Question:
We are given four metrology instruments P, Q, R, S and four applications numbered 1 to 4, and we need to find the correct instrument-to-application match.
Each instrument has one job it is best known for on the shop floor.
Step 2: Match each instrument to its real use:
P. Sine bar: used with slip gauges to set or measure an angle very precisely, so it matches with 2, planar surface inclination of a part.
Q. Profilometer: used to trace a surface and measure its roughness, so it matches with 1, surface roughness of a milled planar surface.
R. Vernier calliper: a general linear measuring tool used to measure lengths, widths, depths, and diameters directly, so it matches with 4, length of any side of a cuboid.
S. Ring GO gauge: a fixed limit gauge that checks whether a shaft diameter is within the allowed upper limit, without giving a numeric reading, so it matches with 3, checking shaft diameter tolerance without direct measurement.
Step 3: Check the options:
Option (A) says P-2, Q-1, R-4, S-3, this matches exactly what we found above, so it looks correct.
Option (B) says P-4, Q-3, R-2, S-1, this swaps sine bar with vernier calliper and profilometer with ring gauge, both wrong.
Option (C) says P-4, Q-1, R-2, S-3, this puts sine bar with cuboid length and vernier calliper with angle, both wrong.
Option (D) says P-2, Q-1, R-3, S-4, this swaps R and S, giving the vernier calliper a gauge job and the ring gauge a length job, both wrong.
Final Answer:
Only option (A) lines up every instrument with its correct application. \[ \boxed{P\text{-}2;\ Q\text{-}1;\ R\text{-}4;\ S\text{-}3} \]
We are given four metrology instruments P, Q, R, S and four applications numbered 1 to 4, and we need to find the correct instrument-to-application match.
Each instrument has one job it is best known for on the shop floor.
Step 2: Match each instrument to its real use:
P. Sine bar: used with slip gauges to set or measure an angle very precisely, so it matches with 2, planar surface inclination of a part.
Q. Profilometer: used to trace a surface and measure its roughness, so it matches with 1, surface roughness of a milled planar surface.
R. Vernier calliper: a general linear measuring tool used to measure lengths, widths, depths, and diameters directly, so it matches with 4, length of any side of a cuboid.
S. Ring GO gauge: a fixed limit gauge that checks whether a shaft diameter is within the allowed upper limit, without giving a numeric reading, so it matches with 3, checking shaft diameter tolerance without direct measurement.
Step 3: Check the options:
Option (A) says P-2, Q-1, R-4, S-3, this matches exactly what we found above, so it looks correct.
Option (B) says P-4, Q-3, R-2, S-1, this swaps sine bar with vernier calliper and profilometer with ring gauge, both wrong.
Option (C) says P-4, Q-1, R-2, S-3, this puts sine bar with cuboid length and vernier calliper with angle, both wrong.
Option (D) says P-2, Q-1, R-3, S-4, this swaps R and S, giving the vernier calliper a gauge job and the ring gauge a length job, both wrong.
Final Answer:
Only option (A) lines up every instrument with its correct application. \[ \boxed{P\text{-}2;\ Q\text{-}1;\ R\text{-}4;\ S\text{-}3} \]
Was this answer helpful?
0
0
Top GATE PI Metrology and Quality Control Questions
- A student is trying to determine the flatness and parallelism of the top surface of a part whose cross-section, assumed uniform in the Z direction, is shown in the figure.
Which ONE of the following options is CORRECT?
- Which ONE or MORE among the following options is/are TRUE for the ideal operating characteristics (OC) curve given in the figure?
Note: \( p_0 \) represents the acceptable quality level (AQL) and \( p_1 \) represents the lot tolerance percent defective (LTPD).
- In the measurement of surface roughness using a 2D stylus profilometer, a surface profile measured over a length of 0.8 mm was recorded on a graph paper. During recording, vertical magnification of 10,000 and horizontal magnification of 100 were used. The areas in the as-recorded graph above and below the datum line are as follows:
Above (mm\(^2\)): 140, 60, 150, 50
Below (mm\(^2\)): 70, 50, 120, 160
The average surface roughness (\(R_a\)) of the surface is ______ \(\mu m\) (rounded off to two decimal places).
Top GATE PI Questions
- In an air-standard Otto cycle, the pressure and temperature of air just before the compression stroke are 200 kPa and 26.85 °C, respectively. The combustion process is assumed to be a constant volume process, where 1.02 MJ/kg heat is added. The cycle efficiency is 50%. The adiabatic index \(γ\) and specific heat at constant volume \(C_v\) can be considered to be constant during the process (corresponding values taken at the mean cycle temperature).
Assuming that the ideal gas law is applicable, \(γ = \frac 43\) and \(c_v= 0.85\ kJ/kg-K\), the maximum pressure (in MPa) reached during the cycle is _____ . (Rounded off to 1 decimal place) - A metallic cylindrical pressure vessel, used to store compressed air in a plant, has 1 m mean radius and 4 mm wall thickness. The maximum allowable normal and shear stresses in the cylindrical portion of the vessel are 100 MPa and 40 MPa, respectively. Considering only these data in the design, the maximum allowable internal gauge pressure (in MPa) of the compressed air is ______ . (Rounded off to 2 decimal places)
- A flat belt drive with pulley of r = 20 cm radius is designed to transmit 6.283 kW power at 600 RPM. In the figure, τ is the corresponding torque. If the coefficient of static friction between the belt and the pulley is 0.3, then the minimum value of the tightening force F (in kN) required to prevent the belt slip is _____ . (Rounded off 2 decimal places)
- Mild steel plates are welded to make butt joints by arc welding with 85% heat transfer efficiency ignoring other losses. The first weld joint is made by selecting arc voltage of 30 V and current of 180 A with a welding speed of 6 mm/s. Using identical plates, a second weld joint is made with the same arc voltage and a welding speed of 8 mm/s. If both the welds have the same heat input, then the welding current (in A) for the second weld joint is _____. (Answer in integer)
- In a single pass cold rolling operation, a flat plate is reduced to a thickness of 3 mm. In this operation, two rolls of diameter 400 mm each are rotating in opposite direction at 300 RPM, and the elastic deflection of these rolls is negligible. The angle of bite is 10°. If the neutral point is present at an angle of 7° from the exit side, then the thickness of the plate (in mm) at the neutral point is _____ . (Rounded off to 1 decimal place)
View More Questions