Automobile Engineering MCQ page-14

Question 131:- The piston-skirt clearance at room temperature is about (a) 0.004 mm (b) 0.04 mm (c) 0.4 mm (d) 1 mm

Question 132:- Piston pins on some engines are offset to the (a) right side (b) left side (c) major thrust side (d) minor thrust side

Question 133:- The purpose of piston rings is to control (a) combustion pressures (b) cylinder wall lubrication (c) oil consumption (d) all of the above

Question 134:- In autothermic pistons steel inserts arc used to (a) reduce piston expansion (b) control the direction of expansion (c) reduce piston weight (d) make the piston stronger

Question 135:- The minimum number of compression rings in an automotive engine is (a) one (b) two (c) three (d) four

Question 136:- Compression rings are generally made of (a) low carbon steel (b) high carbon steel (c) aluminium (d) chromium

Question 137:- The uppermost ring on a piston is usually plated with (a) steel (b) cast iron (c) aluminium (d) chromium

Question 138:- On the compression stroke the rings are pressed against (a) top of groove (b) bottom of groove (c) inner side of groove (d) all of these

Question 139:- The primary purpose of a ring expander is to (a) make up for cylinder wear (b) increase static ring tension (c) decrease dynamic ring tension (d) reduce ring vibrations

Question 140:- Connecting rod connects the crankshaft and the (a) cylinder head (b) cylinder block (c) piston (d) camshaft

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