Practice Test: Question Set - 30
1. The ratio of the ultimate stress to the design stress is known as
- (A) Elastic limit
- (B) Strain
- (C) Factor of safety
- (D) Bulk modulus
2. A shaft is subjected to fluctuating loads for which the normal torque (T) and bending moment (M) are 1000 N-m and 500 N-m respectively. If the combined shock and fatigue factor for bending is 1.5 and combined shock and fatigue factor for torsion is 2, then the equivalent twisting moment for the shaft is
- (A) 2000 N-m
- (B) 2050 N-m
- (C) 2100 N-m
- (D) 2136 N-m
3. Which of the following formula is used in designing a connecting rod?
- (A) Euler's formula
- (B) Rankine's formula
- (C) Johnson's straight line formula
- (D) Johnson's parabolic formula
4. In the levers of first type, the mechanical advantage is ________ one.
- (A) Less than
- (B) Equal to
- (C) More than
- (D) None of these
5. The plasticity is the property of a material which enables it to
- (A) Regain its original shape after deformation when the external forces are removed
- (B) Draw into wires by the application of a tensile force
- (C) Resist fracture due to high impact loads
- (D) Retain deformation produced under load permanently
6. In a journal bearing, the load on the bearing is __________ to the axis of the journal.
- (A) Parallel
- (B) Perpendicular
- (C) Both A and B
- (D) None of these
7. Which of the following cotter joint will be used to connect strap end of a connecting rod?
- (A) Spigot and socket cotter joint
- (B) Sleeve and cotter joint
- (C) Gib and cotter joint
- (D) Any one of these
8. The fatigue stress concentration factor is defined as
- (A) The ratio of endurance limit with stress concentration to the endurance limit without stress concentration
- (B) The ratio of endurance limit without stress concentration to the endurance limit with stress concentration
- (C) The product of the endurance limits with and without stress concentration
- (D) All of the above
9. A flange coupling is used to connect two shafts
- (A) Which are perfectly aligned
- (B) Which are not in exact alignment
- (C) Have lateral misalignment
- (D) Whose axes intersect at a small angle
10. In a full journal bearing, the angle of contact of the bearing with the journal is
- (A) 120°
- (B) 180°
- (C) 270°
- (D) 360°
11. The coefficient of friction between the belt and pulley depends upon the
- (A) Material of belt and pulley
- (B) Slip of belt
- (C) Speed of belt
- (D) All of these
12. The steel pulleys are __________ in weight than cast iron pulleys of the same capacity.
- (A) Heavier
- (B) Lighter
- (C) Moderate
- (D) None of these
13. The centre to centre distance between two consecutive rivets in a row, is called
- (A) Margin
- (B) Pitch
- (C) Back pitch
- (D) Diagonal pitch
14. If the size of a standard specimen for a fatigue testing machine is increased, the endurance limit for the material will
- (A) Have same value as that of standard specimen
- (B) Increase
- (C) Decrease
- (D) None of these
15. A crankshaft is a __________ shaft.
- (A) Transmission
- (B) Machine
- (C) Machine frame
- (D) None of these