This set of Machine Design Multiple Choice Questions & Answers (MCQs) focuses on “Numerical on Power Screws”. 1. Find the torque required to raise the load of 15kN and mean diameter of triple threaded screw being 46mm. Also given pitch=8mm and coefficient of friction is 0.15. a) 11831.06N-mm b) 11813.06N-mm c) 12811.06N-mm d) None of … Read more
This set of Machine Design Questions & Answers for experienced focuses on “Threaded Joints:Basics & Cap Screws”. 1. Threaded joints are non-separable joints. a) True b) False 2. Which type of joints is better when the product is subjected to large vibrations: welded or threaded? a) Welded b) Threaded c) Both have same results d) … Read more
This set of Machine Design Interview Questions & Answers focuses on “Effeciency of Screws”. 1. Efficiency of screw depends upon lead of the screw. a) True b) False 2. Efficiency of the screw depends upon helix angle but does not depend on friction angle. a) True b) False 3. Efficiency of the screw _______ with … Read more
This set of Machine Design Multiple Choice Questions & Answers (MCQs) focuses on “Power Screws & Self Locking Screws-Basics”. 1. A power screw is only used to convert rotary motion into linear motion and not for transmitting power. a) True b) False 2. Depending upon the holding arrangement, power screws operate in how many different … Read more
This set of Machine Design Questions & Answers for freshers focuses on “Fluctuating Stresses & Fatigue Failure”. 1. The stress represented by sin (t) + 1 belongs to which category? a) Fluctuating Stresses b) Alternating stresses c) Repeated Stresses d) Reversed Stresses 2. The stress represented by sin (t) + 2 belongs to which category? … Read more
This set of Machine Design Multiple Choice Questions & Answers (MCQs) focuses on “Stress Concentration & Its Factors”. 1. Stress concentration is defined as the localization of high stresses due to irregularities present in the component and no changes of the cross section. a) True b) False 2. Stress Concentration Factor is the ratio of … Read more
This set of Machine Design Multiple Choice Questions & Answers (MCQs) focuses on “Fracture Mechanics, Curved beams & Thermal Stresses”. 1. Stress intensity factor is the critical value of stress at which crack extension occurs. a) True b) False 2. The critical value at which crack extension occurs is called a) Stress Intensity Factor b) … Read more
This set of Machine Design Multiple Choice Questions & Answers (MCQs) focuses on “Levers”. 1. Mechanical advantage is the ratio of effort to load. a) True b) False 2. Leverage is the ratio of load arm to effort arm. a) True b) False 3. The distance between fulcrum and dead weights is 100mm. Dead weights … Read more
This set of Machine Design Multiple Choice Questions & Answers (MCQs) focuses on “Principal Stresses & Theories of Elastic Failures”. 1. The normal stress is perpendicular to the area under considerations, while the shear stress acts over the area. a) True b) False 2. If a body is subjected to stresses in xy plane with … Read more
This set of Machine Design Multiple Choice Questions & Answers (MCQs) focuses on “Knuckle Joints”. 1. Knuckle Joint can’t be used to connect two intersecting rods. a) Yes b) No, it can’t be used c) It can be used with some modificatios d) It is expensive and hence isn’t used 2. A knuckle joint is … Read more
