Practice Test: Question Set - 38
1. A compound belt drive is used when
- (A) Shafts are arranged parallel and rotate in the opposite directions
- (B) Shafts are arranged parallel and rotate in the same directions
- (C) Shafts are arranged at right angles and rotate in one definite direction
- (D) None of the above
2. The application of second type levers is found in
- (A) Handle of a hand pump
- (B) Hand wheel of a punching press
- (C) Lever of a loaded safety valve
- (D) A pair of tongs
3. When a shaft is subjected to combined twisting moment (T) and bending moment (M), then the equivalent twisting moment is equal to
- (A) (1/2) × √(M² + T²)
- (B) √(M² + T²)
- (C) (1/2) × [M +√(M² + T²)]
- (D) M +√(M² + T²)
4. For crank shaft bearings, the ratio of the length of the journal to its diameter is_________.
- (A) Less than unity
- (B) Greater than unity
- (C) Equal to 1
- (D) None of these
5. Pitch point of a cam is
- (A) A point on the pitch curve having minimum pressure angle
- (B) A point on the pitch curve having maximum pressure angle
- (C) Any point on the pitch curve
- (D) Any point on the pitch circle
6. The property of a bearing material which has the ability to accommodate small particles of dust, grit etc. without scoring the material of the journal, is called
- (A) Bondability
- (B) Embeddability
- (C) Comformability
- (D) Fatigue strength
7. The face angle of a bevel gear is equal to
- (A) Pitch angle - addendum angle
- (B) Pitch angle + addendum angle
- (C) Pitch angle - dedendum angle
- (D) Pitch angle + dedendum angle
8. A thin spherical shell of internal diameter d is subjected to an internal pressure p. If σt is the tensile stress for the shell material, then thickness of shell is equal to
- (A) pd/σt
- (B) pd/2σt
- (C) pd/3σt
- (D) pd/4σt
9. When the pulley or other mating piece is required to slide along the shaft, a __________ sunk key is used.
- (A) Rectangular
- (B) Square
- (C) Parallel
- (D) None of these
10. The algebraic difference between the maximum limit and the basic size is called
- (A) Lower deviation
- (B) Upper deviation
- (C) Actual deviation
- (D) Mean deviation
11. If b denotes the face width and L denotes the cone distance for a bevel gear, then the bevel factor is written as
- (A) b/L
- (B) b/2L
- (C) 1 - 2 b.L
- (D) 1 - (b/L)
12. In order to have smooth operation, the minimum number of teeth on the smaller sprocket, for moderate speeds, should be
- (A) 15
- (B) 17
- (C) 21
- (D) 25
13. The included angle for the British standard whitworth thread is
- (A) 29°
- (B) 47.5°
- (C) 55°
- (D) 60°
14. The metal suitable for bearings subjected to light loads is
- (A) Silicon bronze
- (B) White metal
- (C) Monel metal
- (D) Phosphor bronze
15. In order to withstand resistance to wear, the best profile of gear is
- (A) 14½° full depth involute tooth
- (B) 20° full depth involute tooth
- (C) 20° involute stub tooth
- (D) 14½° stub tooth