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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

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
The piston rod of a steam engine is usually connected to the cross head by means of__________________?
A bolted joint
B kunckle joint
C cotter joint
D universal joint
Correct Answer: cotter joint
Spring index is___________________?
A ratio of coil diameter to wire diameter
B load required to produce unit deflection
C its capability of storing energy
D indication of quality of spring
Correct Answer: ratio of coil diameter to wire diameter
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