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Which of the following heart valves are mechanical valves? i. Ball Valve ii. Autograft Valve iii. Xenograft Valve iv. Single Leaflet Valve v. Homograft Valve vi. Bi leaflet Valves
The maximum harbour depth below lowest low water is generally equal to
(i) loaded draft + 1.2 m when bottom is rock
(ii) loaded draft + 1.8 m when bottom is soft
(iii) loaded draft + 1.2 m when bottom is soft
(iv) loaded draft + 1.8 m when bottom is rock
Which one of the statement is correct?
1. Petrol engine is a reciprocating engine
2. Petrol engine is high speed engine
3. Petrol engine uses petrol as fuel
4. Petrol engine is internal combustion engine
Directions : In each of the following questions a statement is given, followed by two conclusions. Give answer :

Statement : Sachin's mother instructed him to return home by train if it rains heavily.

Assumptions :
I. Sachin may not be able to decide himself if it rains heavily.
II. The trains may ply even if it rains heavily.
A 2" gate valve fitted in a pipe is replaced by a similar globe valve. Pressure drop in gate valve was Δp. For the same discharge, the pressure drop across globe valve is
Which of the figures shown in the options is an F-head engine as per valve arrangement (SV is suction valve, whereas EV is Exhaust valve)?
Saurabh is shifting his house. He loaded things on a horse-cart who cannot pull a load heavier than 300kg. He loaded the following weights on the horse-cart. Things loaded Weight A sack of wheat 150kg A sack of rice 55kg Almirah 68kg Water tank 75kg Utensils 20kg Which thing should be removed so that the weight of the load is equal to 300 kg?
A valve clearance of about 0.3 mm is usually given to ensure that the valve closes fully. What is tappet clearance in an overhead valve engine?
If due attention is not given to the valve size, valve timing and valve flow coefficients there may be a substantial loss with the increase in engine speed.
Consider the following statements regarding supercharging of Diesel engines: 1) The mechanical efficiency of a supercharged diesel engine is slightly better than that of the naturally aspirated engine. 2) There is a reduction in smoke in the case of a supercharged engine in the overload operation. 3) Increased valve overlap is used in the supercharged engine. Which of the above statements are correct?