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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

Guest’s theory of failure is applicable for following type of materials_________________?
A brittle
B ductile
C elastic
D plastic
Correct Answer: ductile
The property of a material which enables it to resist fracture due to high impact loads is known as__________________?
A elasticity
B endurance
C strength
D toughness
Correct Answer: toughness
The designation M 33 x 2 of a bolt means___________________?
A metric threads of 33 nos in 2 cm.
B metric threads with cross-section of 33 mm
C metric threads of 33 mm outside diameter and 2 mm pitch
D bolt of 33 mm nominal diameter having 2 threads per cm
Correct Answer: metric threads of 33 mm outside diameter and 2 mm pitch
Rivets are generally specified by_______________?
A thickness of plates to be riveted
B length of rivet
C diameter of head
D nominal diameter
Correct Answer: nominal diameter
Which of the following is a permanent fastening ?
A bolts
B keys
C cotters
D rivets
Correct Answer: rivets
If the tearing efficiency of a riveted joint is 75%, then the ratio of diameter of rivet to the pitch is equal to___________________?
A 0.2
B 0.25
C 0.50
D 0.6
Correct Answer: 0.2
Jam 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 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 spitted and bent in reverse direction at other end
Correct Answer: one smaller nut is tightened over main nut and main nut tightened against smaller one by loosening, creating friction jamming
A key capable of tilting in a recess milled out in a shaft is known as______________________?
A wood-ruff key
B feather key
C flat saddle key
D gib head key
Correct Answer: wood-ruff key
A tapered key which fits in a keyway in the hub and is flat on the shaft, is known as___________________?
A wood-ruff key
B feather key
C flat saddle key
D gib head key
Correct Answer: flat saddle key
Turn buckle has____________________?
A right hand threads on bout ends
B left hand threads on both ends
C left hand threads on one end and right hand threads on other end
D no threads
Correct Answer: left hand threads on one end and right hand threads on other end
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