A locking device extensively used in marine type connecting rod ends is a

A locking device extensively used in automobile industry is a

A

Jam nut

B

Castle nut

C

Sawn nut

D

Ring nut

A locking device in which the bottom cylindrical portion is recessed to receive the tip of the locking set screw, is called

A

Ring nut

B

Castle nut

C

Sawn nut

D

Jam nut

What type of bearing is used for main bearings and connecting rod bearings?

A

Ball bearings

B

Plain bearings

C

Needle roller bearing

D

Taper roller bearing

Elastic nut is a locking device in which

A

One small nut is tightened over main nut and main nut tightened against smaller one by loosening, creating friction jamming

B

A slot is cut partly in middle of nut and then slot reduced by tightening a screw

C

Hard fibre or nylon cotter is recessed in the nut and becomes threaded as the nut is stewed on the bolt causing a tight grip

D

Through slots are made at top and a cotter pin is passed through these and a hole in the bolt, and cotter pin splitted and bent in reverse direction at other end

Jam nut is a locking device in which

A

One smaller nut is tightened over main nut and main nut tightened against smaller one by loosening, creating friction jamming

B

A slot is cut partly in middle of nut and then slot reduced by tightening a screw

C

A hard fibre or nylon cotter is recessed in the nut and becomes threaded as the nut is screwed on the bolt causing a tight grip

D

Through slots are made at top and a cotter pin is passed through these and a hole in the bolt, and cotter spitted and bent in reverse direction at other end

Split nut is a locking device in which

A

One smaller nut is tightened over main nut and main nut tightened against smaller one by loosening, creating friction jamming

B

A slot is cut partly in middle of nut and then slot reduced by tightening screw

C

A hard fibre or nylon cotter is recessed in the nut and becomes threaded as the nut is screwed on the bolt causing a tight grip

D

Through slots are made at top and a cotter pin is passed through these and a hole in the bolt, and cotter pin splitted and bent in reverse direction at the other end

Castle nut is a locking device in which

A

One smaller nut is tightened over main nut and main nut tightened against smaller one by loosening, creating friction jamming

B

A slot is cut partly is middle of nut and then slot reduced by tightening a screw

C

A hard fibre or nylon cotter is recessed in the nut and becomes threaded as the nut is screwed on the bolt causing a tight grip

D

Through slots are made at top and a cotter pin is passed through these and a hole in the bolt, and cotter pin spitted and bent in reverse direction at other end

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

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

The primary unbalanced force due to inertia of reciprocating parts in a reciprocating engine is given by (where m = Mass of reciprocating parts, $$\omega $$ = Angular speed of crank, r = Radius of crank, $$\theta $$ = Angle of inclination of crank with the line of stroke and n = Ratio of the length of connecting rod to radius of crank)

A

$${\text{m}}{\omega ^2}{\text{r}}\sin \theta $$

B

$${\text{m}}{\omega ^2}{\text{r}}\cos \theta $$

C

$${\text{m}}{\omega ^2}{\text{r}}\frac{{\sin 2\theta }}{{\text{n}}}$$

D

$${\text{m}}{\omega ^2}{\text{r}}\frac{{\cos2\theta }}{{\text{n}}}$$

A locking device extensively used in marine type connecting rod ends is a

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