600 Important Machine Design MCQ Question and Answer | PDF Free Download
1.The centre to centre distance between two consecutive rivets in a row, is called
- AMargin
- BPitch
- CBack pitch
- DDiagonal pitch
2.The bending stress in a curved beam is
- AZero at the centroidal axis
- BZero at the point other than centroidal axis
- CMaximum at the neutral axis
- DNone of these
3.The rated life of a bearing varies
- ADirectly as load
- BInversely as square of load
- CInversely as cube of load
- DInversely as fourth power of load
4.A cotter joint is used to connect two __________ rods
- ACo-axial
- BPerpendicular
- CPerpendicular
- DNone of these
5.In a gear, having Involute teeth, the normal to the Involute is a tangent to the
- ABase circle
- BPitch circle
- CAddendum circle
- DDedendum circle
6.The groove angle of the pulley for rope drive is usually
- A20°
- B35°
- C45°
- D60°
7.A thin spherical shell of internal diameter d is subjected to an internal pressure p. If V is the storage capacity of shell, then its diameter will be
- A(6V/ π)1/2
- B(6V/ π)1/3
- C(6V/ π)2
- D(6V/ π)3
8.Which one of the following loading is considered for the design of axles?
- ABending moment only
- BTwisting moment only
- CCombined bending moment and twisting moments
- DCombined action of bending moment, twisting moment and axial thrust
9.The coefficient of friction between the belt and pulley depends upon the
- AMaterial of belt and pulley
- BSlip of belt
- CSpeed of belt
- DAll of these
10.In a flange coupling, the bolts are subjected to
- ATensile stress
- BCompressive stress
- CShear stress
- DNone of these
11.Transverse fillet welded joints are designed for
- ATensile strength
- BCompressive strength
- CShear strength
- DBending strength
12.The edges of the plates for cylindrical vessels are usually bevelled to an angle of 80° for
- AReducing stress concentration
- BEase of manufacture
- CSafety
- DFullering and caulking
13.In a boundary lubricated bearing, there is a __________ of lubricant between the journal and the bearing.
- AThick film
- BThin film
- CEither A or B
- DNone of these
14.According to Unwin's formula, the relation between the diameter of rivet hole (d) and the thickness of plate (t) is given by (where d and t are in mm)
- Ad = √t
- Bd = 1.6√t
- Cd = 2√t
- Dd = 6√t
15.The buckling load will be maximum for a column, if
- AOne end of the column is clamped and the other end is free
- BBoth ends of the column are clamped
- CBoth ends of the column are hinged
- DOne end of the column is hinged and the other end is free
16.The yield point in static loading is __________ as compared to fatigue loading.
- AHigher
- BLower
- CSame
- DNone of these
17.In designing thick cylinders, the equation used is
- ALame's equation
- BBirnie's equation
- CClavarinos' equation
- DAll of these
18.A double strap butt joint (with equal straps) is
- AAlways in single shear
- BAlways in double shear
- CEither in single shear or double shear
- DAny one of these
19.The valve rod in a steam engine is connected to an eccentric rod by
- ACotter joint
- BBolted joint
- CKnuckle joint
- DUniversal coupling
20.The objective of idler pulley in belt drive is to
- ADecrease the tendency of belt to slip
- BIncrease the power transmission capacity
- CIncrease the wrap angle and belt tension
- DAll the above objectives