Today, all competitive exams are Multiple Choice Questions(MCQ) based examination system and the main factor is to answer each question in a prescribed time. So, practice as much as possible before the original test you are going to face.
Total number of Multiple Choice Question (MCQ) is 15 and time allotted for each question is 30 seconds. After the allotted time, the question will be marked as un-attempt.
QUIZ
Test Conducted by: ObjectiveBooks.com
Next Mock Tests:
01. If the spark plug deposit indicates black coating of soot, it indicates that the engine has been generally operating on
(A) Too lean mixture
(B) Stoichiometric mixture
(C) Most economical mixture
(D) Too rich mixture
Answer: Option D
02. Most high speed compression engines operate on
(A) Diesel cycle
(B) Otto cycle
(C) Dual combustion cycle
(D) Special type of air cycle
Answer: Option C
03. The ignition coil is used to
(A) Step up current
(B) Step down current
(C) Step up voltage
(D) Step down voltage
Answer: Option C
04. Combustion in compression ignition engines is
(A) Homogeneous
(B) Heterogeneous
(C) Both (A) and (B)
(D) Laminar
Answer: Option B
05. The exhaust gas from petrol engine contains
(A) Petrol vapours
(B) Water vapours
(C) Carbon monoxide
(D) All of these
Answer: Option D
06. In a four stroke cycle, the minimum temperature inside the engine cylinder occurs at the
(A) Beginning of suction stroke
(B) End of suction stroke
(C) Beginning of exhaust stroke
(D) End of exhaust stroke
Answer: Option A
07. The reconditioning process used to give cylinder bore surfaces a crosshatch pattern, is known as
(A) Honing
(B) Porous plating
(C) Boring
(D) Shot peening
Answer: Option A
08. The scavenging efficiency of a four stroke cycle diesel engine is
(A) Below 50%
(B) Between 50 and 85%
(C) Between 85 and 95%
(D) Between 95 and 100%
Answer: Option D
09. The best fuels for compression ignition engines are
(A) Straight chain paraffin
(B) Aromatics
(C) Branched chain paraffin
(D) Naphthalene
Answer: Option D
10. The ignition quality of diesel oil is expressed by
(A) Cetane number
(B) Octane number
(C) Calorific value
(D) None of these
Answer: Option A
11. The combustion process in a Diesel engine is a
(A) Constant volume process
(B) Constant pressure process
(C) Constant temperature process
(D) Adiabatic process
Answer: Option B
12. The object of supercharging the engine is
(A) To reduce mass of the engine per brake power
(B) To reduce space occupied by the engine
(C) To increase the power output of an engine when greater power is required
(D) All of the above
Answer: Option D
13. The ignition in a spark ignition engine takes place when the piston is
(A) Exactly at the T.D.C. position on its compression stroke
(B) Approaching the T.D.C. position on its compression stroke
(C) Leaving the T.D.C. position on its compression stroke
(D) Approaching the T.D.C position on its exhaust stroke
Answer: Option B
14. In a four stroke cycle engine, the sequence of operations is
(A) Suction, compression, expansion and exhaust
(B) Suction, expansion, compression and exhaust
(C) Expansion, compression, suction and exhaust
(D) Compression, expansion, suction and exhaust
Answer: Option A
15. The correct way to rectify an imbalanced wheel is to
(A) Adjust the tyre pressure
(B) Rotate the tyres
(C) Adjust the damper spring tension
(D) Attach appropriate weights to the wheel at appropriate positions
Answer: Option D
