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Mechanical Engineering Mcqs 1919 MCQs [All-Courses]

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Mechanical Engineering MCQs prepared for job test and interview preparation, especially for fresh graduates, students, and candidates appearing in competitive exams. These multiple-choice questions cover key topics such as Machine Design, Theory of Machines, Hydraulic Machines, and other important mechanical engineering concepts.

All Topics  1919

A self locking screw has________________>
A fine threads
B coarse threads
C coefficient of friction > tangent of load angle
D hole for inserting split pin
Correct Answer: coefficient of friction > tangent of load angle
Which is correct statement ?
A a member made of steel will generally be more rigid than a member of equal load-carrying ability made of cast iron
B a member made of cast iron will generally be. more rigid than a member of equal load carrying ability made of steel
C both will be equally rigid
D which one is rigid will depend on several other factors
Correct Answer: a member made of cast iron will generally be. more rigid than a member of equal load carrying ability made of steel
A bolt___________________?
A has a head on one end and a nut fitted to the other
B has head at one end and other end fits into a tapped hole in the other part to be joined
C has both the ends threaded
D is provided with pointed threads
Correct Answer: has a head on one end and a nut fitted to the other
If d is the diameter of bolt hole then for a flanged pipe joint to be leak proof, the circumferential pitch of the bolts should be_________________?
A lOVZ
B 10VZtol5Vd
C 15Vdto20VZ
D 20Vdto30Vd
Correct Answer: 20Vdto30Vd
Shear stress theory is applicable for____________________?
A ductile fnaterials
B brittle materials
C elastic materials
D all of the above
Correct Answer: ductile fnaterials
For applications involving high stresses in one direction only the following type of thread would be best suited______________________?
A ISO metric thread
B acme thread
C square thread
D buttress thread
Correct Answer: buttress thread
The function of a washer is to___________________?
A provide cushioning effect
B provide bearing area
C absorb shocks and vibrations
D provide smooth surface in place of rough surface
Correct Answer: provide bearing area
Ball bearing type screws are found in following application_____________________?
A screw jack
B aeroplane engines
C crane
D steering mechanism
Correct Answer: steering mechanism
An alien bolt is___________________?
A self locking bolt
B same as stud
C provided with hexagonal depression in head
D used in high speed components
Correct Answer: provided with hexagonal depression in head
Set screws are_________________?
A similar to small size tap bolts except that a greater variety of shapes of heads are available
B slotted for a screw driver and generally used with a nut
C used to prevent relative motion be-tween parts
D similar to stud
Correct Answer: used to prevent relative motion be-tween parts
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