The tropical cyclone ‘Pabuk’ has occurred on 5 Jan, 2019 in which of the following countries?A. Thailand
B. Indonesia
C. Japan
D. Mauritius
B. Indonesia
C. Japan
D. Mauritius
Month: January 2019
Piston rings are plated with chromium,cadmium or phosphate in order to__________________?
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
The pistons are usually given a coating such as tin plating in order to________________?
The pistons are usually given a coating such as tin plating in order to________________?
A. reduce weight
B. conduct heat efficiently
C. reduce possibility of scoring
D. reduce friction
E. increase lubrication effect
If overhead clearance is less, then the following type of engine should be selected__________________?
If overhead clearance is less, then the following type of engine should be selected__________________?
A. V-type
B. In-line
C. Vertical
D. Horizontal
E. Radial
The top piston ring nearer to the piston crown is known as_____________________?
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 usually made of___________________?
Piston rings are usually made of___________________?
A. cast iron
B. aluminium
C. phosphor bronze
D. babbitt
E. carbon steel
Which is false statement about advantages of V-type engine_________________?
Which is false statement about advantages of V-type engine_________________?
A. compact design requiring lesser space
B. improved distribution of air to cylinder
C. casting less liable to distortion
D. reduced torsional vibration because of shorter crankshaft
E. less overhead clearance
Detonation is caused by the following unstable compounds______________________?
Detonation is caused by the following unstable compounds______________________?
A. peroxides, aldehydes and ketones
B. peroxides, aldehydes, oxides and sul-phides
C. aldehydes, oxides and ketones
D. ketones and sulphur compounds
E. none of the above
The function of a fuel pump in a petrol pump is to______________________?
The function of a fuel pump in a petrol pump is to______________________?
A. inject fuel in cylinder
B. supply fuel when carburettor fails
C. pump fuel so that it reaches carburettor (to improve thermal efficiency)
D. does not exist
The thermal efficiency of a petrol engine of two stroke with crank case scavenging as compared to four stroke petrol engine with same comperssion ratio will be_____________________?
The thermal efficiency of a petrol engine of two stroke with crank case scavenging as compared to four stroke petrol engine with same comperssion ratio will be_____________________?
A. higher
B. lower
C. same
D. depends on size of engine
E. unpredictable.