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# Test: Shafts, Keys & Couplings - 3

## 20 Questions MCQ Test Topicwise Question Bank for Mechanical Engineering | Test: Shafts, Keys & Couplings - 3

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This mock test of Test: Shafts, Keys & Couplings - 3 for Mechanical Engineering helps you for every Mechanical Engineering entrance exam. This contains 20 Multiple Choice Questions for Mechanical Engineering Test: Shafts, Keys & Couplings - 3 (mcq) to study with solutions a complete question bank. The solved questions answers in this Test: Shafts, Keys & Couplings - 3 quiz give you a good mix of easy questions and tough questions. Mechanical Engineering students definitely take this Test: Shafts, Keys & Couplings - 3 exercise for a better result in the exam. You can find other Test: Shafts, Keys & Couplings - 3 extra questions, long questions & short questions for Mechanical Engineering on EduRev as well by searching above.
QUESTION: 1

### Match the following lists pertaining to standard proportions for various dimensions of the bushed-pin flexible coupling: List-I A. Outside diameter of hub B. Length of hub C. Pitch circle diameters of pins D. Thickness of output flange List-II 1. 1.5d 2. 4d 3. 0.5d 4. 2d to 3d 5. 3d to 4d 6. 2d 7. 0.7d Codes:      A B C D (a) 6 1 5 3 (b) 2 6 4 7 (c) 2 1 5 3 (d) 6 2 4 7

Solution:

where d is the diameter of shaft.

QUESTION: 2

### A sleeve or muff coupling is designed as

Solution:

Torsional shear stress induced in the sleeve is checked by the following equations.

QUESTION: 3

### The outer diameter of sleeve in the design of sleeve coupling is taken as where, d is the diameter of shaft

Solution:
QUESTION: 4

If d is the diameter of shaft, then in designing a sleeve coupling, the length of sleeve is prescribed by the identity

Solution:
QUESTION: 5

Which is not the correct proportion of the solid flanged (marine type flange) coupling in terms of diameter d of the shaft?

Solution:

Thickness of flange = 0.33 d

QUESTION: 6

A key connecting a flange coupling to a shaft is likely to fail in

Solution:
QUESTION: 7

The bolts in rigid flanged coupling connecting two shafts transmitting power are subjected to

Solution:
QUESTION: 8

Which of the following is a flexible coupling

Solution:

Odlham coupling is the flexible coupling used to connect two shaft have lateral misalignment.

QUESTION: 9

Which material is used for bushes in the bushed pin type of flexible coupling

Solution:

To have some flexibility rubber is used as a material for bushes in bushed pin type flexible coupling.

QUESTION: 10

In the assembly design of shaft, pulley and key the weakest member is

Solution:

Key is the weakest member in the assembly of shaft, pulley and key. Key acts as a safety device, whenever there is excess load appears on the pulley key first and it keeps safer to shift and pulley.

QUESTION: 11

The shearing area of a key of length l breadth ’b ’ depth ‘h’ is equal to

Solution:

Shearing area = b x L

QUESTION: 12

The key shown in the above figure is a

Solution:

Woodruff key is a sunk key, in the form of an almost semi-circular disc of uniform thickness. Due to its shape it has self aligning property.

QUESTION: 13

Which of the following key have self aligning property

Solution:
QUESTION: 14

A key made from a cylindrical disc having segmental cross-section is know as

Solution:

QUESTION: 15

Which key transmits power through frictional resistance only

Solution:

Saddle key is a key that fits in the key way of the hub only. In this case there is no keyway provided on the shaft and friction between shaft, key and hub prevents relative motion between the shaft and the hub and power is transmitted by means of friction only.

QUESTION: 16

Kennedy keys are used for applications like

Solution:
QUESTION: 17

Two shaft will have equal strength if

Solution:
QUESTION: 18

Which one of the following loading is considered for design of axles

Solution:

Axle is used to support the wheel hence it is subjected to only bending moment. Since it has no role to play in transmission of power hence it is not subjected to twisting moment.

QUESTION: 19

When a shaft transmits power through gears the shaft experience

Solution:
QUESTION: 20

Match List-I with List-ll and select the correct answer using the codes given below:
List-I
A. Rigid coupling
B. Oldham coupling
C. Universal joint
D. Gear coupling
List-ll
1. Permits greater torque capacity for a given size
2. Permits substantial angular misalign-ment of intersecting axes
3. Permits substantial lateral offset and little angular alignment
4. Permits almost no misalignment
Codes:
A B C D
(a) 1 2 3 4
(b) 4 2 3 1
(c) 1 3 2 4
(d) 4 3 2 1

Solution: