The ratio of pitch circle diameter in millimeters to the number of teeth, is called

The ratio of the number of teeth to the pitch circle diameter in millimeters, is called

A

circular pitch

B

diametral pitch

C

module

D

none of the mentioned

A certain dentist specializes in implanting gold and silver teeth in his patients mouths .He charges $ 650 for a gold tooth an $ 325. for a silver tooth. If his told fees for implanting gold and silver teeth last week were $ 15, 925 in total and he implanted five more gold teeth that silver teeth, how many teeth in total did he implant over the week?

A

33

B

32

C

31

D

34

The relation between the pitch of the chain (p) and pitch circle diameter of the sprocket (D) is given by (where T = Number of teeth on the sprocket)

A

$${\text{p}} = {\text{D}}\sin \frac{{{{90}^ \circ }}}{{\text{T}}}$$

B

$${\text{p}} = {\text{D}}\sin \frac{{{{120}^ \circ }}}{{\text{T}}}$$

C

$${\text{p}} = {\text{D}}\sin \frac{{{{180}^ \circ }}}{{\text{T}}}$$

D

$${\text{p}} = {\text{D}}\sin \frac{{{{360}^ \circ }}}{{\text{T}}}$$

For a bevel gear having the pitch angle $$\theta $$, the ratio of formative number of teeth (TE) to actual number of teeth (T) is

A

$$\frac{1}{{\sin \theta }}$$

B

$$\frac{1}{{\cos \theta }}$$

C

$$\frac{1}{{\tan \theta }}$$

D

$$\sin \theta \cos \theta $$

If T is the actual number of teeth on a helical gear and $$\varphi $$ is the helix angle for the teeth, then formative number of teeth is written as

A

$${\text{T}}{\sec ^3}\varphi $$

B

$${\text{T}}{\sec ^2}\varphi $$

C

$$\frac{{\text{T}}}{{{{\sec }^3}\varphi }}$$

D

$${\text{Tcosec}}\varphi $$

In helical gears, the distance between similar faces of adjacent teeth along a helix on the pitch cylinders normal to the teeth, is called

A

normal pitch

B

axial pitch

C

diametral pitch

D

module

When the addenda on pinion and wheel is such that the path of approach and path of recess are half of their maximum possible values, then the length of the path of contact is given by (where r = Pitch circle radius of pinion, R = Pitch circle radius of wheel and $$\varphi $$ = Pressure angle)

A

$$\frac{{\left( {{{\text{r}}^2} + {{\text{R}}^2}} \right)\cos \varphi }}{2}$$

B

$$\frac{{\left( {{{\text{r}}^2} + {{\text{R}}^2}} \right)\sin \varphi }}{2}$$

C

$$\frac{{\left( {{\text{r}} + {\text{R}}} \right)\cos \varphi }}{2}$$

D

$$\frac{{\left( {{\text{r}} + {\text{R}}} \right)\sin \varphi }}{2}$$

In a shell and tube heat exchanger having square pitch, the shell side equivalent diameter is given by (where, P = pitch, d = outside diameter of the tube)

A

$$\frac{{4\left( {{{\text{p}}^2} - \pi {{\text{d}}^2}/4} \right)}}{{\pi {\text{d}}}}$$

B

$$\frac{{{{\text{p}}^2} - \pi {{\text{d}}^2}/4}}{{\pi {\text{d}}}}$$

C

$$\frac{{4{{\text{p}}^2}}}{{\pi {\text{d}}}}$$

D

$$\frac{{\pi {\text{d}}}}{{4{{\text{p}}^2}}}$$

Which of the following property sets pitch or tone (high or low) for the synthesized speech when reading an element; the pitch may be specified absolutely or relative to the normal pitch for the voice-family used to read the text?

A

voice-check

B

voice-format

C

voice-pitch

D

voice-volume

If average particle size of the silt in millimeters is m, the Lacey's silt factor f is proportional to

A

m³

B

$${{\text{m}}^{\frac{1}{2}}}$$

C

$${{\text{m}}^{\frac{1}{3}}}$$

D

$${{\text{m}}^{\frac{2}{3}}}$$

The ratio of pitch circle diameter in millimeters to the number of teeth, is called

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