Theory Of Machine MCQ Questions & Answers

61

The radial distance from the top of a tooth to the bottom of a tooth in a meshing gear, is called

A) Dedendum B) Addendum C) Clearance D) Working depth

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Answer & Solution

Answer: Option C

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62

Flexible coupling is used because

A) It is easy to disassemble B) It is easy to engage and disengage C) It transmits shocks gradually D) It prevents shock transmission and eliminates stress reversals

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Answer & Solution

Answer: Option D

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63

In its simplest form, a cam mechanism consists of following number of links

A) 1 B) 2 C) 3 D) 4

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Answer & Solution

Answer: Option C

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64

The steering of a ship means

A) Movement of a complete ship up and down in vertical plane about transverse axis B) Turning of a complete ship in a curve towards right or left, while it moves forward C) Rolling of a complete ship sideways D) None of the above

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Answer & Solution

Answer: Option B

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65

In a reciprocating steam engine, when the crank has turned from inner dead center through an angle $$\theta $$, the angular velocity of the connecting rod is given by

A) $$\frac{{\omega \,\sin \theta }}{{{{\left( {{{\text{n}}^2} - {{\sin }^2}\theta } \right)}^{\frac{1}{2}}}}}$$ B) $$\frac{{\omega \,\cos\theta }}{{{{\left( {{{\text{n}}^2} - {{\cos }^2}\theta } \right)}^{\frac{1}{2}}}}}$$ C) $$\frac{{\omega \,\sin \theta }}{{{{\left( {{{\text{n}}^2} - {{\cos }^2}\theta } \right)}^{\frac{1}{2}}}}}$$ D) $$\frac{{\omega \,\cos\theta }}{{{{\left( {{{\text{n}}^2} - {{\sin }^2}\theta } \right)}^{\frac{1}{2}}}}}$$

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Answer & Solution

Answer: Option D

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66

The Klein's diagram is used when

A) Crank has uniform angular velocity B) Crank has nonuniform angular velocity C) Crank has uniform angular acceleration D) Crank has nonuniform angular acceleration

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Answer & Solution

Answer: Option A

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67

Two heavy rotating masses are connected by shafts of lengths $${l_1},\,{l_2}$$ and $${l_3}$$ and the corresponding diameters are d₁, d₂ and d₃. This system is reduced to a torsionally equivalent system having uniform diameter d = d₁ of the shaft. The equivalent length of the shaft is

A) $$\frac{{{l_1} + {l_2} + {l_3}}}{3}$$ B) $${l_1} + {l_2}{\left( {\frac{{{{\text{d}}_1}}}{{{{\text{d}}_2}}}} \right)^3} + {l_3}{\left( {\frac{{{{\text{d}}_1}}}{{{{\text{d}}_3}}}} \right)^3}$$ C) $${l_1} + {l_2}{\left( {\frac{{{{\text{d}}_1}}}{{{{\text{d}}_2}}}} \right)^4} + {l_3}{\left( {\frac{{{{\text{d}}_1}}}{{{{\text{d}}_3}}}} \right)^4}$$ D) $${l_1} + {l_2} + {l_3}$$

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Answer & Solution

Answer: Option C

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68

The radius of a friction circle for a shaft rotating inside a bearing is (where r = Radius of shaft and $$\tan \varphi $$ = Coefficient of friction between the shaft and bearing)

A) $${\text{r}}\sin \varphi $$ B) $${\text{r}}\cos \varphi $$ C) $${\text{r}}\tan \varphi $$ D) $$\frac{{\text{r}}}{2}\cos \varphi $$

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Answer & Solution

Answer: Option A

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69

Any point on a link connecting double slider crank chain will trace a

A) Straight line B) Circle C) Ellipse D) Parabola

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Answer & Solution

Answer: Option C

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70

The method of obtaining different mechanisms by fixing in turn different links in a kinematic chain, is known as

A) Structure B) Machine C) Inversion D) Compound mechanism

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Answer & Solution

Answer: Option C

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Theory Of Machine MCQ Questions & Answers | Mechanical Engineering