Theory Of Machine MCQ Questions & Answers

91

What is the number of instantaneous centers for an eight link mechanism?

A) 15 B) 28 C) 30 D) 8

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Answer & Solution

Answer: Option B

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92

A Porter governor is a

A) Pendulum type governor B) Dead weight governor C) Spring loaded governor D) Inertia governor

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Answer & Solution

Answer: Option B

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93

Two pulleys of radii r₁ and r₂ and at distance x apart are connected by means of a cross belt drive. The length of the belt is

A) $$\pi \left( {{{\text{r}}_1} + {{\text{r}}_2}} \right) + \frac{{{{\left( {{{\text{r}}_1} + {{\text{r}}_2}} \right)}^2}}}{{\text{x}}} + 2{\text{x}}$$ B) $$\pi \left( {{{\text{r}}_1} + {{\text{r}}_2}} \right) + \frac{{{{\left( {{{\text{r}}_1} - {{\text{r}}_2}} \right)}^2}}}{{\text{x}}} + 2{\text{x}}$$ C) $$\pi \left( {{{\text{r}}_1} - {{\text{r}}_2}} \right) + \frac{{{{\left( {{{\text{r}}_1} - {{\text{r}}_2}} \right)}^2}}}{{\text{x}}} + 2{\text{x}}$$ D) $$\pi \left( {{{\text{r}}_1} - {{\text{r}}_2}} \right) + \frac{{{{\left( {{{\text{r}}_1} + {{\text{r}}_2}} \right)}^2}}}{{\text{x}}} + 2{\text{x}}$$

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Answer & Solution

Answer: Option A

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94

Two pulleys of radii r₁ and r₂ and at distance x apart are connected by means of an open belt drive. The length of the belt is

A) $$\pi \left( {{{\text{r}}_1} + {{\text{r}}_2}} \right) + \frac{{{{\left( {{{\text{r}}_1} + {{\text{r}}_2}} \right)}^2}}}{{\text{x}}} + 2{\text{x}}$$ B) $$\pi \left( {{{\text{r}}_1} + {{\text{r}}_2}} \right) + \frac{{{{\left( {{{\text{r}}_1} - {{\text{r}}_2}} \right)}^2}}}{{\text{x}}} + 2{\text{x}}$$ C) $$\pi \left( {{{\text{r}}_1} - {{\text{r}}_2}} \right) + \frac{{{{\left( {{{\text{r}}_1} - {{\text{r}}_2}} \right)}^2}}}{{\text{x}}} + 2{\text{x}}$$ D) $$\pi \left( {{{\text{r}}_1} - {{\text{r}}_2}} \right) + \frac{{{{\left( {{{\text{r}}_1} + {{\text{r}}_2}} \right)}^2}}}{{\text{x}}} + 2{\text{x}}$$

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Answer & Solution

Answer: Option B

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95

Transmission angle is the angle between

A) Input link and coupler B) Input link and fixed link C) Output link and coupler D) Output link and fixed link

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Answer & Solution

Answer: Option C

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96

A disc is a spinning with an angular velocity $$\omega $$ rad/s about the axis of spin. The couple applied to the disc causing precession will be (where $$I$$ = Mass moment of inertia of the disc and $$\omega {\text{P}}$$ = Angular velocity of precession of the axis of spin)

A) $$\frac{1}{2}I{\omega ^2}$$ B) $$I{\omega ^2}$$ C) $$\frac{1}{2}I\omega \omega {\text{P}}$$ D) $$I\omega \omega {\text{P}}$$

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Answer & Solution

Answer: Option D

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97

Throw of a cam is the maximum distance of the follower from

A) Base circle B) Pitch circle C) Root circle D) Prime circle

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Answer & Solution

Answer: Option A

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98

The height of a Watt's governor (in meters) is equal to (where N = Speed of the arm and ball about the spindle axis)

A) $$\frac{{8.95}}{{{{\text{N}}^2}}}$$ B) $$\frac{{89.5}}{{{{\text{N}}^2}}}$$ C) $$\frac{{895}}{{{{\text{N}}^2}}}$$ D) $$\frac{{8950}}{{{{\text{N}}^2}}}$$

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Answer & Solution

Answer: Option C

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99

Oldham’s coupling is an inversion of the kinematic chain used in

A) Whitworth quick return mechanism B) Elliptical trammels C) Rotary engine D) Universal joint

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Answer & Solution

Answer: Option B

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100

The Coriolis component of acceleration depends upon

A) Velocity of slider B) Angular velocity of the link C) Both (A) and (B) D) None of these

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Answer & Solution

Answer: Option C

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Theory Of Machine MCQ Questions & Answers | Mechanical Engineering