Internal Combustion Engines (I.C. Engines) MCQ Questions & Answers | Mechanical Engineering

A. More

B. Less

C. Same

D. May be more or less depending on engine capacity

A. Benzene

B. Iso-octane

C. Normal heptane

D. Alcohol

A. Minimum temperature to which oil is heated in order to give off inflammable vapours in sufficient quantity to ignite momentarily when brought in contact with a flame

B. Temperature at which it solidifies or congeals

C. It catches fire without external aid

D. Indicated by 90% distillation temperature i.e., when 90% of sample oil has distilled off

A. To distribute spark

B. To distribute power

C. To distribute current

D. To time the spark

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

A. Alcohol

B. Water

C. Lead

D. None of these

A. $${\text{B}}{\text{.P}}{\text{.}} = \frac{{{\text{W}}l \times 2\pi {\text{N}}}}{{60}}{\text{ watts}}$$

B. $${\text{B}}{\text{.P}}{\text{.}} = \frac{{\left( {{\text{W}} - {\text{S}}} \right)\pi {\text{DN}}}}{{60}}{\text{ watts}}$$

C. $${\text{B}}{\text{.P}}{\text{.}} = \frac{{\left( {{\text{W}} - {\text{S}}} \right)\pi \left( {{\text{D}} + {\text{d}}} \right){\text{N}}}}{{60}}{\text{ watts}}$$

D. All of these

A. Pre-ignition

B. Detonation

C. Ignition delay

D. Auto-ignition

A. $$1 - {{\text{r}}^{\gamma - 1}}$$

B. $$1 + {{\text{r}}^{\gamma - 1}}$$

C. $$1 - \frac{1}{{{r^{\gamma - 1}}}}$$

D. None of these

A. F.P. = B.P. - I.P.

B. F.P. = I.P. - B.P.

C. $${\text{F}}{\text{.P}}{\text{.}} = \frac{{{\text{B}}{\text{.P}}{\text{.}}}}{{{\text{I}}{\text{.P}}{\text{.}}}}$$

D. $${\text{F}}{\text{.P}}{\text{.}} = \frac{{{\text{I}}{\text{.P}}{\text{.}}}}{{{\text{B}}{\text{.P}}{\text{.}}}}$$