Question: The operation of straightening a curved sheet metal, is known as____________________?

• 1. squeezing
• 2. coining
• 3. planishing
• 4. drawing

Question: Which of the following statement is wrong ?

• 1. The mortise gauge has two scribing pins
• 2. The gouges are chisels with a hollow shaped blade
• 3. An auger is a planning tool
• 4. all of these

Question: The evolution of heat of solution takes place in ammonia absorption plant when _____________________?

• 1. ammonia vapour goes into solution
• 2. ammonia vapour is driven out of solution
• 3. lithium bromide mixes with ammonia
• 4. weak solution mixes with strong solution

Question: The C.O.P. of a refrigeration cycle with lowering of condenser temperature, keeping the evaporator temperature constant, will__________________?

• 1. increase
• 2. decrease
• 3. may increase or decrease depending on the type of refrigerant used
• 4. remain unaffected

Question: Cooling water is required for following equipment in ammonia absorption plant__________________?

• 1. condenser
• 2. evaporator
• 3. absorber
• 4. condenser, absorber and separator (rectifier)

Question: The general rule for rating refrigeration systems (excepting for C02 system) is to approximate following h.p. per ton of refrigeration__________________?

• 1. 0.1 to 0.5 h.p. per ton of refrigeration
• 2. 0.5 to 0.8 h.p. per ton of refrigeration
• 3. 1 to 2 h.p. per ton of refrigeration
• 4. 2 to 5 h.p. per ton of refrigeration

Question: Vertical lines on pressure-enthalpy chart show constant_______________?

• 1. pressure lines
• 2. temperature lines
• 3. total heat lines
• 4. entropy lines

Question: The coefficient of performance is the ratio of the refrigerant effect to the_________________?

• 1. heat of compression
• 2. work done by compressor
• 3. enthalpy increase in compressor
• 4. all of the above

Question: Under-cooling in a refrigeration cycle_________________?

• 1. increases COP
• 2. decreases COF
• 3. COP remains unaltered
• 4. other factors decide COP

Question: The suction pipe diameter of refrigerating unit compressor in comparison to delivery side is_________________?

• 1. bigger
• 2. smaller
• 3. equal
• 4. smaller/bigger depending on capacity