AUTOMOBILE ENGINEERING MCQ SECTION 18

171. The following type of radiator matrices has greatest structural strength?

(A) Film type

(B) Tube and flat fin type

(C) Tube and corrugated type

(D) None of the above

Answer: - Tube and corrugated type

172. ‘Damper’ is also known as

(A) Shock absorber

(B) Torsion bar

(C) Spring

(D) Radius rod

Answer: - Shock absorber

173. A battery can be charged by

(A) Adding distilled water

(B) Adding sulphuric acid

(C) Applying voltage in the reverse direction to that of charging

(D) Applying a voltage in the same direction to that of charging

Answer: - Applying voltage in the reverse direction to that of charging

174. The vapour compression refrigerator employs the following cycle

(A) Rankine

(B) Carnot

(C) Reversed Rankine

(D) Reversed Carnot

Answer: - Reversed Carnot

175. The efficiency of a Carnot engine depends on

(A) working substance

(B) design of engine

(C) size of engine

(D) temperatures of source and sink

Answer: - temperatures of source and sink

176. In compression ignition engines, swirl denotes a

(A) Haphazard motion of the gases in the chamber

(B) Rotary motion of the gases in the chamber

(C) Radial motion of the gases in the chamber

(D) None of the above

Answer: - Rotary motion of the gases in the chamber

177. The knocking in spark ignition engines can be reduced by

(A) Retarding the spark

(B) Increasing the engine speed

(C) Both (A) and (B)

(D) None of these

Answer: - Both (A) and (B)

178. In loop scavenging, the top of the piston is

(A) flat

(B) contoured

(C) slanted

(D) depressed

Answer: - contoured

179. Which of the following is the lightest and most volatile liquid fuel ?

(A) diesel

(B) kerosene

(C) fuel oil

(D) gasoline

Answer: - gasoline

180. Compression ratio of I.C. engines is

(A) the ratio of volumes of air in cylinder before compression stroke and after compression stroke

(B) volume displaced by piston per stroke and clearance volume in cylinder

(C) ratio of pressure after compression and before compression

(D) swept volume/cylinder volume

Answer: - the ratio of volumes of air in cylinder before compression stroke and after compression stroke