Practice Test: Question Set - 41
1. The bearing characteristic number in a hydrodynamic bearing depends upon
- (A) Length, width and load
- (B) Length, width and speed
- (C) Viscosity, speed and load
- (D) Viscosity, speed and bearing pressure
2. Which of the following welded joint is designed for shear strength?
- (A) Transverse fillet welded joint
- (B) Parallel fillet welded joint
- (C) Butt welded joint
- (D) All of these
3. The surface finish factor for a mirror polished material is
- (A) 0.45
- (B) 0.65
- (C) 0.85
- (D) 1
4. According to maximum normal stress theory, the maximum normal stress in the shaft is
- (A) (1/2) × √(σ² × 4τ²)
- (B) √(σ² × 4τ²)
- (C) (1/2) × [σ +√(σ² × 4τ²)]
- (D) σ +√(σ² × 4τ²)
5. The dynamic tooth load is due to
- (A) Inaccuracies of tooth spacing
- (B) Irregularities in tooth profiles
- (C) Deflections of teeth under load
- (D) All of these
6. In helical bevel gearing, the axes of shafts are __________ and the teeth are curved.
- (A) Intersecting
- (B) Non-intersecting and non-parallel
- (C) Intersecting and non-parallel
- (D) None of these
7. In a flange coupling, the keys are staggered at __________ along the circumference of the shafts in order to divide the weakening effect caused by key ways.
- (A) 90°
- (B) 135°
- (C) 160°
- (D) 180°
8. In the levers of __________ type, the mechanical advantage is less than one.
- (A) First
- (B) Second
- (C) Third
- (D) None of these
9. The strength of the unriveted plate (P) per pitch length is equal to
- (A) p.d.σt
- (B) p.t.σt
- (C) (p - d) σt
- (D) (p - d) t.σt
10. A shaft coupling should
- (A) Be easy to connect or disconnect
- (B) Transmit full power of the shaft
- (C) Hold the shafts in perfect alignment
- (D) All of these
11. The function of the washer is to
- (A) Fill up the axial gap
- (B) Provide bearing area
- (C) Provide cushioning effect
- (D) Absorb shocks and vibrations
12. Shaft coupling is used in machinery to
- (A) Introduce mechanical flexibility
- (B) Introduce protection against over loads
- (C) Reduce the transmission of shock loads
- (D) All of these
13. A saddle key __________ power through frictional resistance only.
- (A) Transmits
- (B) Does not transmit
- (C) Either A or B
- (D) None of these
14. The cam follower generally used in automobile engines is
- (A) Knife edge follower
- (B) Flat faced follower
- (C) Spherical faced follower
- (D) Roller follower
15. The shear modulus of resilience is proportional to
- (A) Shear stress
- (B) (Shear stress)²
- (C) (Shear stress)3
- (D) (Shear stress)⁴