1) Why are pitch errors observed in threads?
a. Lack of inspection
b. Incorrect ratio of tool work velocity
c. Interference between mating parts
d. All of the above
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Answer
Explanation
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ANSWER: Incorrect ratio of tool work velocity
Explanation:
No explanation is available for this question!
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2) Calculate diameter of best wire for a Withworth thread of M 24 x 7 mm size.
a. 4.04 mm
b. 7.8 mm
c. 3.94 mm
d. 8.08 mm
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Answer
Explanation
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ANSWER: 3.94 mm
Explanation:
No explanation is available for this question!
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3) According to Taylor's principle which type of gauge checks both size and geometric features?
a. Go gauge
b. No go gauge
c. Both a. and b.
d. None of the above
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Answer
Explanation
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ANSWER: Go gauge
Explanation:
No explanation is available for this question!
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4) Which thread has a combined strength of square thread and V thread?
a. Acme thread
b. Knuckle thread
c. Buttress thread
d. British standard Whitworth thread
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Answer
Explanation
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ANSWER: Buttress thread
Explanation:
No explanation is available for this question!
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5) Which type of errors show linear relation between cumulative pitch error and length of thread?
a. Periodic errors
b. Progressive errors
c. Both a. and b.
d. None of the above
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Answer
Explanation
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ANSWER: Progressive errors
Explanation:
No explanation is available for this question!
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6) What is used to measure the major diameter of an external thread?
a. Bench micrometer
b. Thread micrometer
c. One wire method
d. All of the above
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Answer
Explanation
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ANSWER: Bench micrometer
Explanation:
No explanation is available for this question!
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7) Which of the following statements is true?
a. In three wire method, each flank of a thread is touched by a wire in axial plane section and this is valid only for a thread having rank angle
b. Compression error is always subtracted from effective diameter value obtained
c. Floating carriage type of micrometer is used for two wire method ----
d. The value of θ is assumed 30 o while calculating best wire diameter for Withworth thread
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Answer
Explanation
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ANSWER: Floating carriage type of micrometer is used for two wire method ----
Explanation:
No explanation is available for this question!
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8) What effect does pitch error have on nut and bolt?
a. Major diameter of nut decreases and effective diameter of bolt increases
b. Effective diameter of nut decreases and effective diameter of bolt increases
c. Effective diameter of nut increases and effective diameter of bolt decreases
d. None of the above
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Answer
Explanation
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ANSWER: Effective diameter of nut decreases and effective diameter of bolt increases
Explanation:
No explanation is available for this question!
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9) Which type of threads are used to transmit power in one direction?
a. Square threads
b. Buttress threads
c. Both a. and b.
d. None of the above
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Answer
Explanation
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ANSWER: Buttress threads
Explanation:
No explanation is available for this question!
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10) Which method gives accurate results when effective diameter is measured without considering the thread angle?
a. Two wire method
b. Three wire method
c. Best wire size
d. All the above
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Answer
Explanation
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ANSWER: Best wire size
Explanation:
No explanation is available for this question!
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