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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

Elastic nut is a locking device in which__________________?
A one small nut is tightened over main nut and main nut tightened against smaller one by loosening, creating friction jamming
B a slot is cut partly in middle of nut and then slot reduced by tightening a screw
C hard fiber or nylon cotter is recessed in the nut and becomes threaded as the nut is stewed on the bolt causing a tight grip
D through slots are made at top and a cotter-pin is passed through these and a hole in the bolt, and cotter pin splitted and bent in reverse direction at other end
Correct Answer: hard fiber or nylon cotter is recessed in the nut and becomes threaded as the nut is stewed on the bolt causing a tight grip
If threads on a bolt are left hand, threads on nut will be_____________________?
A right hand with same pitch
B left hand with same pitch
C could be left or right hand
D right hand with fine pitch
Correct Answer: left hand with same pitch
Applications in which stresses are encountered in one direction only uses following type of threads____________________?
A metric
B buttress
C acme
D square
Correct Answer: buttress
A bench vice has following type of threads____________________?
A metric
B square
C buttress
D acme
Correct Answer: acme
Split nut is a locking device in which_________________?
A one smaller nut is tightened over main nut and main nut tightened against smaller one by loosening, creating friction jamming
B a slot is cut partly in middle of nut and then slot reduced by tightening screw
C a hard fiber or nylon cotter is recessed in the nut and becomes threaded as the nut is screwed on the bolt causing a tight grip
D through slots are made at top and a cotter-pin is passed through these and a hole in the bolt, and cotter pin splitted and bent in reverse direction at the other end
Correct Answer: a slot is cut partly in middle of nut and then slot reduced by tightening screw
The function of cutting oil when threading a pipe is to___________________?
A provide cooling action
B lubricate the dies
C help remove chips
D all of the above
Correct Answer: all of the above
A tube has the following advantage over pipe_________________?
A lighter and easier to handle
B greater shock absorption
C smoother inside walls
D all of the above
Correct Answer: all of the above
A backing ring is used inside the pipe joint when making a___________________?
A butt weld
B fillet weld
C sleeve weld
D socket weld
Correct Answer: butt weld
Castle nut is a locking device in which__________________?
A one smaller nut is tightened over main nut and main nut tightened against smaller one by loosening, creating friction jamming
B a slot is cut partly is middle of nut and then slot reduced by tightening a screw
C a hard fiber or nylon cotter is recessed in the nut and becomes threaded as the nut is screwed on the bolt causing a tight grip
D through slots are made at top and a cotter pin is passed through these and a hole in the bolt, and cotter pin spitted and bent in reverse direction at other end
Correct Answer: through slots are made at top and a cotter pin is passed through these and a hole in the bolt, and cotter pin spitted and bent in reverse direction at other end
Gear box is used___________________?
A to produce torque
B for speed reduction
C to obtain variable speeds
D to increase efficiency of system
Correct Answer: to obtain variable speeds
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