Bush bearings
A.Phosphor bronze
B.Aluminium bronze
C.Mild steel
D.White metal alloys
E.None of the above
Category: Machine Design Mcqs
A starter in automobile is generally
A.Single phase a.c.motor
B.dc shunt motor
C.dc series motor
D.dc compound motor
E.None of the above
In order to minimise jerks, the type of cam used is
A.Cycloidal
B.S.H.M.
C.Parabolic
D.Cylindrical
E.Hyperbolic
The stress concentration factor for flat bar in tension with a circular hole, is
A.1
B.1.25
C.1.5
D.2
E.2.5
The surface hardness that can be obtained by nitriding is generally in the range
A.1000 to 1100 VPN
B.600 to 800 VPN
C.400 to 600 VPN
D.Below 400 VPN
Lowest value of joint efficiency is assumed in case of
A.Single riveted butt joints
B.Double riveted butt joints
C.Single riveted lap joints
D.Double riveted lap joints
E.None of the above
A bench vice is provided with
A.Vee threads
B.BSW threads
C.Buttress threads
D.Acme threads
E.None of the above
When minimum axial thrust is the criteria, the choice of gears would been
A.Helical gears
B.Hypoid gears
C.Herringbone gears
D.Worm gears
E.None of the above
The thickness of a gear tooth is measured
A.Along the pitch circle
B.Along the root circle
C.Along the outer circle
D.Average of the profile
E.None of the above
The ‘crowning’ of flat pulleys is generally done
A.To rduce the belt friction
B.To prevent belt joint from damaging the belt surface
C.To prevent the belt from running off the pulley
D.In case of cross belt drives only
E.None of the above
