মেট্রোলজি MCQ
121. Which of the following is incorrect about micrometer?
Thimble and barrel should have a dull finish
Total travel of the measuring spindle is called measuring range
Graduated surface diameter of barrel should be 5mm
Screw has 10 or 20 threads per cm
122. What is the least count of clinometer which is used to check reading of column rotation used for setting of helix angles in universal micrometer?
4”
2”
3”
1”
123. Which of the following option is correct for the given statements about vernier height gauge? Statement 1: The projection of scriber beyond the jaw should be 10 mm. Statement 2: Flatness of working surface of scriber can be checked by the knife edge.
Only statement I is correct
Only statement 2 is correct
Both the statements are correct
Both the statements are incorrect
124. Which of the following is used to check change in ocular lines position due to column rotation in universal micrometer?
Slip gauges
Control shaft
Universal microscope
Dial indicator
125. What is the value of total error for grade 1 micrometer when micrometer is tested at 20°C?
4+(L/100)µm
6+ (L/100)µm
5+ (L/100)µm
7+(L/100)µm
126. Vernier calipers is an instrument of-
precision
high precision
non-precision
none of there
127. Which of the following is used for checking the perpendicular distance from the graduated face of a beam to the graduated face of Vernier-
Angle gauge
Vernier depth gauge
Feeler gauge
Slip gauge
128. What is the least count of a micrometer?
0.01µm
0.02µm
0.35µm
0.2µm
129. Why tolerances are given to the parts?
Because it's impossible to make perfect settings
To reduce weight of the component
To reduce cost of the assembly
To reduce amount of material used
130. What is the maximum permissible error in wear of centres?
0.04 mm
0.03 mm
0.02 mm
0.01 mm
131. Which of the following option is correct about given statements about micrometer? Statement 1: The anvil should not protrude from the frame. Statement 2: An adjusting nut is present in micrometer to compensate wear.
Only stalement 1 is true
Only statement 2 is true
Both the statements are true
Both the statements are false
132. What is the use of ratchet stop in micrometer?
Prevent motion of spindle
Maintain uniform measuring pressure
Provide measuring surface
Forms measuring tip
133. What is the permissible error in the perpendicular motion of ocular microscope column w.r.t. The work stage over 100 mm movements?
0:04 mm
0.05 mm
0.07 mm
0.06 mm
134. What is the range of voltage fluctuations which can be taken care by an electronic unit in universal measuring instrument?
18% to 20%
-10% to +50%
-18% to +20%
10% to 50%
135. Which of the following is incorrect?
V-Artvil micrometer caliper is used to check out of roundness
Blade type micrometer has a non-rotating spindle
Tube wall thickness can be measured by an ordinary micrometer
Self-centering inside micrometer has an interchangeable measuring head Vernier
136. What is the maximum permissible error for class 1 micrometers?
0.002 mm
0.004 mm
0.008 mm
0.016 mm
137. What is the total error in micrometer?
Positive and negative deviation from the zero point
Error in parallelism
Deviation from measurement of a nominal dimension
Maximum difference between ordinates of cumulative error
138. Which of the following is correct about micrometer?
Plastic insulating grips are used on the frame
Satin chrome finish increase the reading enors
A uniform and maximum measuring force is applied
Bartel is the removable part of the frame
139. What is the standard reference temperature for the measurement of the accuracy of vernier height gauges?
20K
20°C
40K
40°C
140. What are the functional dimensions?
Have to be machined and fit with other mating components
Which have no effect on the performance of quality
Need not to be machined to an accuracy of the high degree
Function is more important than accuracy