Top 550+ Solved Machine Design MCQ Questions Answer
Q. Which of the following statement about wire ropes is not correct?
a. Wire ropes are used as guy wires with the steel towers
b. Wire ropes have the disadvantage of rigidity and poor strength
c. Increasing the diameter of threaded portion
d. Wire ropes require special fittings for proper end connections
e. Wire ropes are given initial tension
Q. The blow off pressure of a safety valve is
a. Slightly above atmospheric pressure
b. Half of the boiler working pressure
c. 2 x boiler working pressure
d. Boiler working pressure
e. 106% of boiler working pressure
Q. As viscosity of lubricating oil decreases, bearing load capacity
a. increases linearly
b. decreases
c. Increasing the diameter of threaded portion
d. increases exponentially
Q. The maximum strain at the end of plastic range of structural steel is about
a. 1.5 percent
b. 15.0 percent
c. Increasing the diameter of threaded portion
d. 11.0 percent
e. 0.11 percent
Q. The plastic design of a steel structure based on which of the following unsafe?
a. Kinematic method of plastic analyis
b. Mechanism method of plastic analysis
c. Upper bound theorem
d. All of the above
e. Increasing the diameter of threaded portion
Q. The critical pressure of the journal bearing is
a. at which oil film breaks down
b. metal to metal contact begins
c. minimum operating pressure of the bearing
d. none of the above
e. Cast steel
Q. In a shaft fibre orientation in the direction of prevailing stress can be obtained by
a. Increasing the diameter of threaded portion
b. tumbling
c. casting
d. forging
e. annealing
Q. Wringing fit is common in
a. Automobile wheel rims
b. Ball bearings
c. Roller bearing
d. Piston pins
e. Slip gauges
Q. Steel balls for ball bearings are manufactured by
a. Turning
b. Casting
c. Pressing
d. Cold heading
e. Rolling
Q. The piston of a double acting reciprocating steam engine is subjected to
a. fully reversed stresses
b. partly reversed stresses
c. repeated stresses
d. none of the above
e. Increasing the diameter of threaded portion
Q. Shear stress theory is applicable to
a. Brittle materials
b. Ductile materials
c. Plastic materials
d. Visco-elastic materials
e. Elastic materials
Q. In case of a fillet weld, the throat is
a. the hypotenuse of the triangle of the fillet
b. perpendicular distance from the root to the hypotenuse.
c. the smaller side of the triangle of the fillet
d. Increasing the diameter of threaded portion
e. the large side of the triangle of the fillet
Q. The number of degrees of accuracy in case of gears is
a. Ten
b. Twelve
c. Hundred
d. Six
e. One thousand
Q. In case the diameter of a shaft is doubled, its torque transmitting capacity will increase by
a. Big ends of connecting rods for I.C. engines
b. 2 times
c. 8 times
d. 16 times
e. 4 times