AUTOMOBILE ENGINEERING MCQ SECTION 19

181. The working cycle in case of four stroke engine is completed in following number of revolutions of crankshaft

(A) 1/2

(B) 1

(C) 2

(D) 4

Answer: - 2

182. For steel, the ultimate strength in shear as compared to in tension is nearly

(A) same

(B) half

(C) one-third

(D) two-third

Answer: - half

183. The materials having same elastic properties in all directions are called

(A) ideal materials

(B) uniform materials

(C) isotropic materials

(D) real materials

Answer: - isotropic materials

184. In actual machines

(A) mechanical advantage is greater than velocity ratio

(B) mechanical advantage is equal to velocity ratio

(C) mechanical advantage is less than velocity ratio

(D) mechanical advantage is unity

Answer: - mechanical advantage is less than velocity ratio

185. The maximum frictional force which comes into play when a body just begins to slide over another surface is called

(A) limiting friction

(B) sliding friction

(C) rolling friction

(D) kinematic friction

Answer: - limiting friction

186. Center of gravity of a thin hollow cone lies on the axis at a height of

(A) one-fourth of the total height above base

(B) one-third of the total height above base

(C) one-half of the total height above base

(D) three-eighth of the total height above the base

Answer: - one-third of the total height above base

187. If a number of forces act simultaneously on a particle, it is possible

(A) not a replace them by a single force

(B) to replace them by a single force

(C) to replace them by a single force through C.G.

(D) to replace them by a couple

Answer: - to replace them by a single force

188. The designation M 35 × 2 of a bolt means

(A) metric threads of 35 nos in 2 cm

(B) metric threads with cross-section of 35 mm

(C) metric threads of 35 mm outside diameter and 2 mm pitch

(D) none of the above

Answer: - metric threads of 35 mm outside diameter and 2 mm pitch

189. The most common application of float system is

(A) To monitor the fuel tank level in motor vehicle

(B) To monitor the flow of solid

(C) To monitor the flow of liquid

(D) All of these

Answer: - To monitor the fuel tank level in motor vehicle

190. The amount by which the actual size of a shaft is larger than the actual size of mating hole in an assembly

(A) Clearance

(B) Interference

(C) Allowance

(D) None of the above

Answer: - Interference