100 m of water column is equal to
A.10 kN/m2
B.100 kN/m2
C.1000 kN/m2
D.1 kN/m2
E.0.1 kN/m2
Category: Machine Design Mcqs
Dead weight type safety valve is not used on locomotives because
A.It is bulky
B.It gives bad apparatus
C.It is not reliable
D.It is costly
E.It is susceptible to vibratory forces
In case of aircraft body the type of welding generally used is
A.Gas welding
B.Arc welding
C.Spot welding
D.Seam welding
E.None of the above
Cold working of materials
A.Increases the fatigue strength
B.Reduces the fatigue strength
C.Does not change fatigue strength
D.Has no effect on fatigue trength
E.None of the above
ERW pipes are
A.Elastic reinforced wire
B.Extra reinforcement welded
C.Electrically resistance welded
D.Electrically reinforced and welded
E.None of the above
Transverse slots are provided on a thread
A.To reduce stress on threads to be cut
B.To reduce stress on die
C.To reduce effort required to cut threads
D.For simplicity
E.For chip removal and lubrication
The function of gear box in an automobile is
A.To reduce speed
B.To increase speed
C.To provide variable speeds
D.To produce torque
E.To increase efficiency
An induction motor meant for operation on 60 cycles per second is connected to a supply having 50 cycles per second. What will happen
A.The motor will not start
B.The motor will get burnt
C.The motor will run with peculiar noise
D.The operating speed of the motor will be less than the rated
E.The motor will not take load
A boiler shell 280 cm diameter and plate thickness 12 mm is subjected to an internal pressure of 1.2 MN/m2. The hoop stress will be
A.45 N/m2
B.60 N/m2
C.135 N/m2
D.155.5 N/m2
E.180 N/m2
