Online Mechanical Engineering Test - Machine Design Test 2

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Total number of questions: 20.
Time allotted: 30 minutes.
Each question carries 1 mark; there are no negative marks.
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A locking device extensively used in marine type connecting rod ends is a

jam nut

castle nut

sawn nut

ring nut

[#]

The V-belts are particularly suitable for __________ drives.

short

long

[#]

Which of the following has threads at both ends?

Bolt

Tap bolt

Stud

none of these

[#]

The ratio of driving tensions in V-belt drives is __________ flat belt drives.

equal to

sin α times more than

sin α times less than

cosec α times more than

[#]

A thin spherical shell of internal diameter d is subjected to an internal pressure p. If V is the storage capacity of shell, then its diameter will be

[#]

A screw is specified by its

major diameter

minor diameter

pitch diameter

pitch

[#]

Two rigid plates are clamped by means of bolt and nut with an initial force F. After tightening, a separating force P (P < F) is applied to the lower plate, which in turn acts on the nut. The tension in the both after this is

F + P

F - P

[#]

The shear stress at a point in a shaft subjected to a torque is

directly proportional to the polar moment of inertia and to the distance of the point from the axis

directly proportional to the applied torque and inversely proportional to the polar moment of inertia

directly proportional to the applied torque and the polar moment of inertia

inversely proportional to the applied torque and the polar moment of inertia

[#]

A bolt is designed on the basis of __________ with a large factor of safety.

direct tensile stress

direct compressive stress

direct bending stress

direct shear stress

[#]

10.

When a closely coiled helical spring is subjected to a couple about its axis, the stress induced in the wire material of the spring is

bending stress only

a combination of torsional shear stress and bending

direct shear stress only

a combination of bending stress and direct shear stress

[#]

11.

In radial bearings, the load acts __________ to the axis of rotation.

parallel

perpendicular

[#]

12.

In a turnbuckle, if one of the rods has left hand threads, then the other rod will have

right hand threads

left hand threads

multiple threads

pointed threads

[#]

13.

Which of the following statement is correct ?

The cold rolled shafting is stronger than hot rolled shafting

The hot rolled shafting is stronger than cold rolled shafting

The cold rolled and hot rolled shafting are equally strong

The shafts are not made by rolling process

[#]

14.

A hollow shaft will transmit a __________ torque than a solid shaft of the same mass and same material.

smaller

greater

[#]

15.

When a cylinder is subjected to a very high internal fluid pressure, the thin cylinder should be used.

Correct

Incorrect

[#]

16.

The pitch diameter is the __________ diameter of an external or internal screw thread.

effective

smallest

largest

[#]

17.

The diameter of knuckle pin in a knuckle joint is usually taken as (where d = Diameter of the rod)

0.5 d

0.8 d

1.2 d

[#]

18.

When carbon in the cast iron is in the form of cementite, the cast iron will be of white colour.

Correct

Incorrect

[#]

19.

The strength of a riveted joint is equal to

tearing strength of plate (P_t)

shearing strength of rivet (P_s)

crushing strength of rivet (P_c)

least value of P_t P_s and P_c

[#]

20.

The V-belt is used to transmit great amount of power and when the two pulleys are very near to each other.

Correct

Incorrect

[#]

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Online Mechanical Engineering Test - Machine Design Test 2

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