# Practice Test: Question Set - 02

**1. A cotter joint is used to transmit**

- (A) Axial
tensile force only

- (B) Axial
tensile or compressive force

- (C) Axial
compressive force only

- (D) Combined
bending and torsional moment

**2. A knuckle joint is used to transmit**

- (A) Axial
tensile force only

- (B) Axial
tensile or compressive force

- (C) Axial
compressive force only

- (D) Combined
bending and torsional moment

**3. In levers,**

- (A) Mechanical
advantage is more than leverage

- (B) Mechanical
advantage is less than leverage

- (C) Mechanical
advantage is equal to leverage

- (D) None
of the above

**4. The bell crank lever in centrifugal governor is**

- (A) First
type of lever

- (B) Second
type of lever

- (C) Third
type of lever

- (D) None
of the above

**5. Coulomb, Tresca and Guest’s theory of failure is applicable to**

- (A) Ductile
materials

- (B) Composites

- (C) Brittle
materials

- (D) Non-metals

**6. For maximum principal stress theory, the shape of the region of safety on σ**

_{1}, σ_{2}co-ordinate system is- (A) Square

- (B) Hexagon

- (C) Ellipse

- (D) Circle

**7. Fracture mechanics is the science of**

- (A) Predicting
the influence of cracks on fatigue fracture of components

- (B) Predicting
the influence of cracks on brittle fracture of components

- (C) Predicting
the influence of cracks on ductile fracture of components

- (D) None
of the above

**8. The ratio of shear stress to shear strain is called**

- (A) Bulk
modulus

- (B) Poisson’s
ratio

- (C) Modulus
of rigidity

- (D) Modulus
of elasticity

**9. A shaft is transmitting torque Mt and made of material having (t) as permissible shear stress. The diameter of shaft d is given by,**

- (A) ∛(16

*M*

_{t }/

*πτ*)

- (B) ∛(32

*M*

_{t }/

*πτ*)

- (C) ∛(64

*M*

_{t }/

*πτ*)

- (D) ∛(16

*M*

_{t }/

*τ*)

**10. The modulus of elasticity of grey cast iron is**

- (A) 2,07,000
N/mm

^{2}

- (B) 1,00,000
N/mm

^{2}

- (C) 50,000 N/mm

^{2}

- (D) 80,000 N/mm

^{2}

**11. The polar moment of inertia of a hollow shaft, with do and di as outer and inner diameters respectively, is given by,**

- (A)

*π*(

*d*

_{0}

^{4}-

*d*

_{i}

^{4})/32

- (B)

*π*(

*d*

_{0}

^{3}-

*d*

_{i}

^{3})/32

- (C)

*π*(

*d*

_{0}

^{2}-

*d*

_{i}

^{2})/32

- (D)

*π*(

*d*

_{0}

^{4}-

*d*

_{i}

^{4})/16

**12. The joint between the piston rod and the cross head of steam engine is**

- (A) Knuckle
joint

- (B) Universal
joint

- (C) Cotter joint

- (D) Key joint

**13. The modulus of elasticity of carbon steel is**

- (A) 2,07,000
N/mm

^{2}

- (B) 1,00,000
N/mm

^{2}

- (C) 50,000 N/mm

^{2}

- (D) 80,000 N/mm

^{2}

**14. The residual stresses are caused due to**

- (A) Manufacturing
methods like forging

- (B) Machining
methods like milling or grinding

- (C) Cold
working processes like rolling and extrusion

- (D) Any
one of the above

**15. In ‘third’ type of levers, mechanical advantage is**

- (A) Less than
one

- (B) More than
one

- (C) Equal to one

- (D) Any one of
the above

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