Machine Design — Part 2 MCQs with Explanations

45° is the correct answer to “The groove angle of the pulley for rope drive is usually”. This question is standard in competitive examination syllabi for Machine Design.

Knuckle joint is the correct answer to “The valve rod in a steam engine is connected to an eccentric rod by”. This question is standard in competitive examination syllabi for Machine Design.

Always in double shear is the correct answer to “A double strap butt joint (with equal straps) is”. This question is standard in competitive examination syllabi for Machine Design.

All of these is the correct answer to “In designing thick cylinders, the equation used is”. This question is standard in competitive examination syllabi for Machine Design.

Higher is the correct answer to “The yield point in static loading is __________ as compared to fatigue loading.”. This question is standard in competitive examination syllabi for Machine Design.

Both ends of the column are clamped is the correct answer to “The buckling load will be maximum for a column, if”. This question is standard in competitive examination syllabi for Machine Design.

2136 N-m is the correct answer to “A shaft is subjected to fluctuating loads for which the normal torque (T) and bending moment (M) are 1000 N-m and 500 N-m respectively. If the combined shock and fatigue factor for bending is 1.5 and combined shock and fatigue factor for torsion is 2, then the equivalent twisting moment for the shaft is”. This question is standard in competitive examination syllabi for Machine Design.

Ductility is the correct answer to “The property of a material which enables it to be drawn into wires with the application of a tensile force, is called”. This question is standard in competitive examination syllabi for Machine Design.

Pitch angle - dedendum angle is the correct answer to “The root angle of a bevel gear is equal to”. This question is standard in competitive examination syllabi for Machine Design.

Pitch angle + addendum angle is the correct answer to “The face angle of a bevel gear is equal to”. This question is standard in competitive examination syllabi for Machine Design.

Diameter of boiler is the correct answer to “The longitudinal joint in boilers is used to get the required”. This question is standard in competitive examination syllabi for Machine Design.

Tolerance grade for the hole is 6 and for the shaft is 5 is the correct answer to “According to Indian standard specifications, 100 H6/g5 means that”. This question is standard in competitive examination syllabi for Machine Design.

$$\frac{{\text{d}}}{4}$$ is the correct answer to “The usual proportion for the width of key is (where d = Diameter of shaft or diameter of hole in the hub)”. This question is standard in competitive examination syllabi for Machine Design.

Canvas or cotton duck is the correct answer to “The suitable material for belt used in flour mill is”. This question is standard in competitive examination syllabi for Machine Design.

136° is the correct answer to “In Vickers hardness testing, the pyramid indentor apex is”. This question is standard in competitive examination syllabi for Machine Design.

Increases is the correct answer to “Wahl's stress factor __________ very rapidly as the spring index decreases.”. This question is standard in competitive examination syllabi for Machine Design.

More than is the correct answer to “In the levers of first type, the mechanical advantage is ________ one.”. This question is standard in competitive examination syllabi for Machine Design.

0.4 times is the correct answer to “For standard coarse threads of nut, the threads will be as strong in failure by shear as the bolt in tension, if the height of nut (h) is approximately”. This question is standard in competitive examination syllabi for Machine Design.

All of the above is the correct answer to “Stress concentration is caused due to”. This question is standard in competitive examination syllabi for Machine Design.

M6 - 8d is the correct answer to “According to Indian standards, a bolt thread of 6 mm size of coarse pitch and with allowance on the threads and normal tolerance grade is designated as”. This question is standard in competitive examination syllabi for Machine Design.

Strut is the correct answer to “A connecting rod is designed as a”. This question is standard in competitive examination syllabi for Machine Design.

Hollow shaft is the correct answer to “The sleeve or muff coupling is designed as a”. This question is standard in competitive examination syllabi for Machine Design.

First type is the correct answer to “When the fulcrum is in between the load and effort, the lever is said to be of”. This question is standard in competitive examination syllabi for Machine Design.

0.25 and 0.50 is the correct answer to “In block brakes, the ratio of shoe width to wheel diameter is taken between”. This question is standard in competitive examination syllabi for Machine Design.

Pre-stressing thick cylinders is the correct answer to “Auto frettage is the method of”. This question is standard in competitive examination syllabi for Machine Design.

All of the above is the correct answer to “Belt slip may occur due to”. This question is standard in competitive examination syllabi for Machine Design.

6 is the correct answer to “The number of slots in a 25 mm castle nut is”. This question is standard in competitive examination syllabi for Machine Design.

7 mm is the correct answer to “According to I.B.R., the thickness of the boiler shell should not be less than”. This question is standard in competitive examination syllabi for Machine Design.

4 is the correct answer to “According to I.B.R., the factor of safety of riveted joint should not be less than”. This question is standard in competitive examination syllabi for Machine Design.

2 d is the correct answer to “According to I.B.R., the distance between the rows of rivets, for equal number of rivets in more than one row for lap joint or butt joint (chain riveting) shall not be less than”. This question is standard in competitive examination syllabi for Machine Design.

3 mm is the correct answer to “The draw of cotter should not be more than”. This question is standard in competitive examination syllabi for Machine Design.

$$0.124 - \frac{{0.684}}{{\text{T}}}$$ is the correct answer to “Lewis form factor for $$14{\frac{1}{2}^ \circ }$$ composite and full depth involute system is (where T = Number of teeth)”. This question is standard in competitive examination syllabi for Machine Design.

Increases is the correct answer to “The speed of the sprocket reduces as the chain pitch __________ for a given number of teeth.”. This question is standard in competitive examination syllabi for Machine Design.

2.8 is the correct answer to “A shaft is subjected to a maximum bending stress of 80 N/mm 2 and maximum shearing stress equal to 30 N/mm 2 at a particular section. If the yield point in tension of the material is 280 N/mm 2 and the maximum shear stress theory of failure is used, then the factor of safety obtained will be”. This question is standard in competitive examination syllabi for Machine Design.

$$\frac{{{\text{G}}{{\text{d}}^4}}}{{8{{\text{D}}^3}{\text{n}}}}$$ is the correct answer to “The stiffness of a closely coiled helical spring subjected to an axial load W is equal to (where G = Modulus of rigidity and n = Number of active coils)”. This question is standard in competitive examination syllabi for Machine Design.

Butt joint with double cover plate is the correct answer to “For longitudinal joint in boilers, the type of joint used is”. This question is standard in competitive examination syllabi for Machine Design.

Lap joint with one ring overlapping the other is the correct answer to “For circumferential joint in boilers, the type of joint used is”. This question is standard in competitive examination syllabi for Machine Design.

$$\frac{l}{2}$$ is the correct answer to “A column of length $$l$$ is fixed at both ends. The equivalent length of the column is”. This question is standard in competitive examination syllabi for Machine Design.

It is subjected to a higher cyclic loading than the outer side is the correct answer to “The cracks in helical springs used in railway carriages usually start on the inner side of the coil because of the fact that”. This question is standard in competitive examination syllabi for Machine Design.

Yield strength is the correct answer to “Soderberg relation is based on __________ of the material whereas all other failure relation for dynamic loading are based on ultimate strength of the material.”. This question is standard in competitive examination syllabi for Machine Design.