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Machine Design
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Question
When screw threads are to be used in a situation where power is being transmitted in one direction only, then the screw threads suitable for this will be
Options
A. square threads
B. acme threads
C. knuckle threads
D. buttress threads
Correct Answer
buttress threads
Machine Design problems
Search Results
1. In radial cams, the follower moves
Options
A. in a direction perpendicular to the cam axis
B. in a direction parallel to the cam axis
C. in any direction irrespective of cam axis
D. along the cam axis
Show Answer
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Discuss
Correct Answer: in a direction perpendicular to the cam axis
2. In a reciprocating steam engine, the heat energy in the steam is converted into mechanical work by the to and fro motion of the piston.
Options
A. Agree
B. Disagree
Show Answer
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Discuss
Correct Answer: Agree
3. The effect of wire drawing is to decrease the area of indicator diagram and thus work done by the engine is reduced.
Options
A. Agree
B. Disagree
Show Answer
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Discuss
Correct Answer: Agree
4. Which of the following statement is correct?
Options
A. Lancashire boiler is a fire tube boiler.
B. Fire tube boilers are internally fired.
C. Babcock and Wilcox boiler is a water tube boiler.
D. all of the above
Show Answer
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Correct Answer: all of the above
5. The length of shell of a Locomotive boiler is
Options
A. 1 m
B. 2 m
C. 3 m
D. 4 m
Show Answer
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Discuss
Correct Answer: 4 m
6. When a bolt is subjected to shock loading, the resilience of the bolt should be considered in order to prevent breakage at the
Options
A. head
B. shank
C. thread
D. middle
Show Answer
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Discuss
Correct Answer: thread
7. In unilateral system of tolerance, the tolerance is allowed on
Options
A. one side of the actual size
B. one side of the nominal size
C. both sides of the actual size
D. both sides of the nominal size
Show Answer
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Discuss
Correct Answer: one side of the nominal size
8. In a hydrodynamic lubricated bearing
Options
A. there is a thick film of lubricant between the journal and the bearing
B. there is a thin film of lubricant between the journal and the bearing
C. there is no lubricant between the journal and the bearing
D. the lubricant is forced between the journal and the bearing, by external pressure
Show Answer
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Discuss
Correct Answer: there is a thick film of lubricant between the journal and the bearing
9. Stress concentration is caused due to
Options
A. variations in load acting on a member
B. variations in properties of materials in a member
C. abrupt change of cross-section
D. all of these
Show Answer
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Discuss
Correct Answer: abrupt change of cross-section
10. In second type of levers,
Options
A. load is in between the fulcrum and effort
B. effort is in between the fulcrum and load
C. fulcrum is in between the load and effort
D. none of these
Show Answer
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Discuss
Correct Answer: load is in between the fulcrum and effort
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