# 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 σ_{t}is the tensile stress for the shell material, then thickness of shell is equal to- (A)

*pd/σ*

_{t}- (B)

*pd/*2

*σ*

_{t}- (C)

*pd/*3

*σ*

_{t}- (D)

*pd/*4

*σ*

_{t}**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*/2

*L*

- (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

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