⚙️ Mechanical Eng Solved MCQs with Answers

Practice 934 approved ⚙️ Mechanical Eng questions with verified answers from the 🛠️ Engineering Essentials subject for Pakistan exams.

934 solved MCQs

In order to avoid excessive multiplication of facilities, the layout preferred isAnswer: process layout In A-B-C analysis, which class of items are generally large in number?Answer: C Simplex method is the method used forAnswer: linear programming DispatchingAnswer: is concerned with the starting of processes Which of the following wage incentive plan guarantees minimum wage to a worker and bonus is paid for the fixed percentage of time saved?Answer: Halsey plan Job evaluation is the method of determining theAnswer: relative values of a job The routing function in a production system design is concerned withAnswer: machine utilisation In big automobile repair shop, for elevating and moving the heavy parts such as complete engine assembly, gear box etc., an overhead crane and a fork lift truck is used.Answer: Yes Direct expenses includeAnswer: none of these String diagram is usedAnswer: all of the above Which of the following type of layout is suitable for automobile manufacturing concern?Answer: product layout Representative time is the average of times recorded by work study man for an operation.Answer: Agree Queuing theory is associated withAnswer: waiting time PERT requiresAnswer: triple time estimate The product layout is more amenable to automation than process layout.Answer: True In break even analysis, total cost consists ofAnswer: fixed cost + variable cost According to principle of conservation of energy, the total momentum of a system of masses in any direction remains constant unless acted upon by an external force in that direction.Answer: False The friction experienced by a body, when in motion, is known asAnswer: dynamic friction Two balls of equal mass and of perfectly elastic material are lying on the floor. One of the ball with velocity v is made to struck the second ball. Both the balls after impact will move with a velocityAnswer: v/2 The term 'force' may be defined as an agent which produces or tends to produce, destroys or tends to destroy motion.Answer: Agree The coefficient of restitution for elastic bodies is one.Answer: Incorrect The velocity ratio in case of an inclined plane inclined at angle θ to the horizontal and weight being pulled up the inclined plane by vertical effort isAnswer: sin θ The range of projectile on a downward inclined plane is __________ the range on upward inclined plane for the same velocity of projection and angle of projection.Answer: more than The angle of inclination of a vehicle when moving along a circular path __________ upon its mass.Answer: does not depend A body of weight W is required to move up on rough inclined plane whose angle of inclination with the horizontal is α. The effort applied parallel to the plane is given by(where μ = tanφ = Coefficient of friction between the plane and the body).Answer: P = W (sinα + μcosα) If the resultant of two equal forces has the same magnitude as either of the forces, then the angle between the two forces isAnswer: 120° A smooth cylinder lying on its convex surface remains in __________ equilibrium.Answer: unstable Coefficient of friction is the ratio of the limiting friction to the normal reaction between the two bodies.Answer: Yes Moment of inertia of a circular section about an axis perpendicular to the section isAnswer: πd⁴/32 The unit of angular acceleration isAnswer: rad/s²