A.The range of variation of engine speed
B.The ratio of the maximum speed to minimum speed within the operating range
C.The ratio of the difference between the maximum and mean speed to that of minimum to mean speed
D.The ratio of the difference between the maximum and minimum equilibrium speed to the mean equilibrium speed
E.None of the above
A.Half of the reciprocating masses are balanced by rotating masses
B.1/2 of the reciprocating mass are balanced by equivalent rotating mass
C.More than half of the reciprocating masses are balanced by rotating masses
D.Reciprocating masses are balanced half by equivalent opposite reciprocating masses and the balance by rotating masses
E.None of the above
A.The part of the tooth surface lying below the pitch surface
B.The curve forming face and flank
C.The width of the gear tooth measured axially along the pitch surface
D.The surface of the top of the tooth
E.Radius that connects the root circle to the profile of the tooth
A.Worm is driver
B.Worm wheel is driver
C.Either of the worm or worm wheel is a driver
D.Depends on other factors
E.None of the above
A.Zero
B.One
C.Two
D.Three
E.Four
A.Addendum + dedendum
B.Dedendum
C.Addendum
D.Addendum-clearance
E.Dedendum-clearance
A.there are 4 turning pairs
B.one is a turning pair and 3 sliding pairs
C.two turning pairs and two sliding pairs
D.None of the above
A.0?
B.90?
C.180?
D.270?
E.None of the above
A.Bevel gears
B.Hooke’s joint
C.Oldham’s coupling
D.None of the above
A.Spherical pairs
B.Turning pairs
C.Rolling pairs
D.Lower pairs
E.Higher pairs
