1) A gear has 30 teeth with module 4 mm and pressure angle of 20o. Calculate length of base tangent in a gear over 7 teeth space.
a. 21.25 mm
b. 90.23 mm
c. 62.53 mm
d. None of the above
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Answer
Explanation
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ANSWER: 90.23 mm
Explanation:
No explanation is available for this question!
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2) Spiral gears are used to transmit power when the shafts are
a. parallel
b. interesting
c. parallel and intersecting
d. neither parallel nor intersecting
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Answer
Explanation
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ANSWER: neither parallel nor intersecting
Explanation:
No explanation is available for this question!
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3) Which of the following statements is/are true?
a. Parkinson's gear tester is used to measure variation in centre distance
b. Tool maker's microscope is used to measure tooth thickness
c. Teeth having wider flanks have less strength
d. All the above statements are true
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Answer
Explanation
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ANSWER: Parkinson's gear tester is used to measure variation in centre distance
Explanation:
No explanation is available for this question!
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4) Smooth motion in involute tooth profile is possible due to
a. variation in pressure angle
b. constant pressure angle
c. Both a. and b.
d. None of the above
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Answer
Explanation
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ANSWER: constant pressure angle
Explanation:
No explanation is available for this question!
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5) Which type of tooth profile has double curvature?
a. cycloidal tooth profile
b. involute tooth profile
c. both a. and b.
d. none of the above
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Answer
Explanation
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ANSWER: cycloidal tooth profile
Explanation:
No explanation is available for this question!
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6) Calculate the tool width of a gear having 30 number of teeth and with module 5 mm.
a. 6.352 mm
b. 5.555 mm
c. 7.850 mm
d. none of the above
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Answer
Explanation
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ANSWER: 7.850 mm
Explanation:
No explanation is available for this question!
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7) Which formula is used to calculate diametral pitch?
a. (number of teeth) x (pitch circle diameter)
b. (pitch circle diameter) / (number of teeth)
c. (number of teeth) / (pitch circle diameter)
d. none of the above
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Answer
Explanation
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ANSWER: (number of teeth) / (pitch circle diameter)
Explanation:
No explanation is available for this question!
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8) Analytical checking of gears includes checking of
a. tooth profile
b. vibrations
c. noise level
d. all of the above
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Answer
Explanation
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ANSWER: tooth profile
Explanation:
No explanation is available for this question!
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9) Which of the following instruments is used to measure base pitch of a gear in base tangent method?
a. Gear tooth vernier caliper
b. David Brown tangent caliper
c. David Brown tangent comparator
d. David Brown tangent micrometer
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Answer
Explanation
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ANSWER: David Brown tangent comparator
Explanation:
No explanation is available for this question!
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10) Which of the following components are inspected by a Tool maker's microscope?
a. gauges
b. screw threads
c. dies and fixtures
d. all of the above
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Answer
Explanation
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ANSWER: all of the above
Explanation:
No explanation is available for this question!
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