Top 550+ Solved Machine Design MCQ Questions Answer
Q. The ends of the coil of compression spring which are in contact with the seat are
a. Carry maximum load
b. Have significant role in compression
c. Inactive
d. Most active
e. As active as spring
Q. Transverse slots are provided on a thread
a. To reduce effort required to cut threads
b. For simplicity
c. For chip removal and lubrication
d. To reduce stress on threads to be cut
e. To reduce stress on die
Q. Plow bolts are widely used in
a. electrical fittings
b. plastics
c. form machinery
d. electronic components
e. Increasing the diameter of threaded portion
Q. In case of spur gears, the back lash depends on
a. Module
b. Pitch line velocity
c. Tooth profile
d. Both (A) and (B) above
e. None of the above
Q. If the threads on a bolt are right hand the threads on nut will be
a. Right hand with less clearance
b. Right hand withmore clerance
c. Left hand with more clearance
d. Right hand
e. Left hand
Q. Sand drops from the bottom of a hopper into a horizontally moving belt conveyor. If the conveyor is travelling at 2000 fpm and the sand is fed at the rate of 1500 1b/min, the force necessary to drive the conveyor would be
a. 258 lb
b. Zero
c. Cannot be determined from the given data
d. 10 kg
e. 516 lb
Q. In nylon bearings operate at very high rpm molybdenum disulphide as used mainly to
a. assists in heat dissipation
b. provide porous bearing media for vibration absorption
c. Increasing the diameter of threaded portion
d. reduce frictional losses
e. improve mechanical and lubricating properties
Q. The pin supporting the exhaust iever of an internal combustion engine is subjected to a shear load of 400 kg/sq-cm the diameter of the pin should be
a. 1.5 cm
b. 4 cm
c. 1 cm
d. 6 cm
e. 2 cm
Q. Which of the following is not a standard ball diameter for Brinell hardness testing?
a. 25 mm
b. 1 mm
c. 10 mm
d. 5 mm
e. 2 mm
Q. Rivets are made of
a. Brittle material
b. Ductile material
c. Soft material
d. Hard material
e. None of the above
Q. A rolled steel flat designated as 50 ISF 8 means
a. the flat is 50 mm wide and 8 mm thick
b. Increasing the diameter of threaded portion
c. the flat has cross-section 50 sq. mm and depth 8 mm
d. the flat has cross-section 50 sq mm and width 8 mm
e. the flat is 50 mm long and 8 mm thick
Q. The loss of strength in compression which occurs when there is a gain in strength in the tension due to overloading is
a. Bousehinger effect
b. Relaxation
c. Hysteresis
d. Iso-strain
e. Hooke's effect
Q. A spherical gas tank is made of 1 cm steel plate hemispheres but welded together. The tank is 1503 cm in diameter. The allowable internal pressure to which tank may be subjected is the permissible stress be limited to 840 kg/sq cm would be in the range
a. 2.0 to 2.5 kg/sq-cm
b. 3.5 to 5.0 kg/sq-cm
c. 2.5 to 3.5 kg/sq-cm
d. 1.5 to 2.0 kg/sq-cm
e. 1 to 1.5 kg/sq-cm
Q. Which type of gears are preferred for low noise applications?
a. Spur gears with cycloidal profile
b. Spur gears with involute profile
c. Bevel gears
d. Helical gears
e. Any of the above
Q. A screw jack spindle is provided with
a. Vee threads
b. BSW threads
c. Buttress threads
d. Square threads
e. None of the above