Applied Mechanics and Graphic Statics

161. In a lifting machine with efficiency 60%, an effort of 200 N is required to raise a load of 6 kN. The velocity ratio of the machine is

1. 30
2. 50
3. 60
4. 80

View answer

162. In a simple harmonic motion, the position of equilibrium is always

1. Stable
2. Unstable
3. Neutral
4. None of the above

View answer

163. In a simple screw jack, the pitch of the screw is 9 mm and length of the handle operating the screw is 45 cm. The velocity ratio of the system is

1. 1.5
2. 5
3. 25
4. 314

View answer

164. In case of S.H.M. the period of oscillation (T), is given by

1. T = 2ω/π²
2. T = 2π/ω
3. T = 2/ω
4. T =π/2ω

View answer

165. In SI units, the units of force and energy are respectively

1. Newton and watt
2. Dyne and erg
3. Newton and joule
4. kg wt and joule

View answer

166. In simple harmonic motion, acceleration of a particle is proportional to

1. Rate of change of velocity
2. Displacement
3. Velocity
4. Direction

View answer

167. In which of the following trusses, the method of substitution is required for determining the forces in all the members of the truss by graphic statics?

1. Howe truss
2. King post truss
3. Fink truss
4. Warren truss

View answer

168. Instantaneous center is at infinity when the angular velocity is

1. Constant
2. Zero
3. Maximum
4. Minimum

View answer

169. It is observed that in a certain sinusoidal oscillation, the amplitude is linearly dependent on the frequency ƒ . If the maximum velocity during the oscillation is 'V' , then 'V' must be proportional to

1. ƒ
2. 1/ƒ
3. 1/ƒ²
4. ƒ²

View answer

170. Joule is the unit of

1. Work
2. Force
3. Power
4. Torque

View answer