A. cast iron
B. aluminium
C. phosphor bronze
D. babbitt
E. carbon steel
Related Mcqs:
- The top piston ring nearer to the piston crown is known as_____________________?
A. compression ring
B. oil ring
C. scrapper ring
D. groove ring
E. leading ring - Piston rings are plated with chromium,cadmium or phosphate in order to__________________?
A. reduce cost
B. improve surface finish
C. prevent clogging
D. reduce wear and eliminate scuffing
E. improve heat transfer - Leakage past the piston rings and valve seats in I.C. engines with increase in speed_______________?
A. increases.
B. decreases
C. remains same
D. unpredictable
E. none of the above - In loop scavenging, the top of the piston is________________?
A. flat
B. contoured
C. slanted
D. depressed
E. convex shaped - In the opposed piston diesel engine, the combustion chamber is located________________?
A. above the piston (/;) below the piston
C. between the pistons
D. any when
E. there is no such criterion - Self-ignition temperature of petrol is of the order of___________________?
A. 150°C
B. 240°C
C. 370°C
D. 450°C
E. more than 500°C. - Air injection in I.C. engines refers to injection of___________________?
A. air only
B. liquid fuel only
C. liquid fuel and air
D. supercharging
E. does not exist - An engineer’s hammer is made of___________________?
A. cast iron
B. forged steel
C. mild steel
D. high carbon steel
E. H.S.S - Pearlite is a combination of___________________?
A. ferrite and cementite
B. cementite and gamma iron
C. ferrite and austenite
D. ferrite and iron graphite
E. pearlite and ferrite - The specific heat of superheated steam in kcal/kg is generally of the order of___________________?
A. 0.1
B. 0.3
C. 0.5
D. 0.8
E. 1.0
